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https://hackaday.com/2025/07/18/2025-one-hertz-challenge-zx-spectrum-is-now-a-z80-frequency-counter/ | 2025 One-Hertz Challenge: ZX Spectrum Is Now A Z80 Frequency Counter | Lewin Day | [
"Retrocomputing"
] | [
"2025 Hackaday One Hertz Challenge",
"frequency counter",
"retrocomputing",
"spectru",
"spectrum",
"ZX Spectrum"
] | The ZX Spectrum is perhaps most fondly remembered as a home computer and a games machine. [Tito] has grabbed the faithful black plastic box
and turned it into a frequency counter
as an innovative entry to our 2025 One Hertz Challenge.
The code was prepared in assembly using ZASM—
a Z80 online assembler
. It works in qu... | 1 | 1 | [
{
"comment_id": "8151610",
"author": "make piece not war",
"timestamp": "2025-07-19T17:59:34",
"content": "I would love to enter the same contest. I am counting to 60 in binary, using the 5 fingers of the left hand and the thumb on my right, and chanting “one mississippi, one mississippi, one missis... | 1,760,371,481.143088 | ||
https://hackaday.com/2025/07/18/before-macintosh-the-story-of-the-apple-lisa/ | Before Macintosh: The Story Of The Apple Lisa | John Elliot V | [
"computer hacks",
"hardware",
"Mac Hacks",
"Retrocomputing"
] | [
"Apple Lisa",
"Apple Macintosh",
"documentary"
] | Film maker [David Greelish] wrote in to let us know about his recent documentary:
Before Macintosh: The Apple Lisa
.
The documentary covers the life of the Apple Lisa. It starts with the genesis of the Lisa Project at Apple, covering its creation, then its marketing, and finally its cancellation. It then discusses the ... | 14 | 7 | [
{
"comment_id": "8151471",
"author": "Bruce W",
"timestamp": "2025-07-19T03:12:03",
"content": "According to Andy Hertzfield, it was actually “Dolt” that was the problematic misreading, though of course it could have been both depending on the user.https://folklore.org/Do_It.html",
"parent_id": ... | 1,760,371,481.431495 | ||
https://hackaday.com/2025/07/18/pvcsub-a-submarine-from-the-plumbing-aisle/ | PVCSub: A Submarine From The Plumbing Aisle | John Elliot V | [
"hardware",
"Misc Hacks",
"Toy Hacks"
] | [
"pvc-pipe",
"submarine"
] | Today in the submersibles department our hacker [Rupin Chheda] wrote in to tell us about
their submarine project
.
This sub is made from a few lengths of PVC piping of various diameters. There is an inflation system comprised of a solenoid and a pump, and a deflation system, also comprised of a solenoid and a pump. The... | 11 | 4 | [
{
"comment_id": "8151440",
"author": "Ject",
"timestamp": "2025-07-18T23:43:44",
"content": "Cool, but really needs a demonstration. Its pretty easy to assemble to basic components of a ROV. Much harder to make it actually work and not flood with water. I notice for example that there is no provisio... | 1,760,371,481.519666 | ||
https://hackaday.com/2025/07/18/time-stars-and-tides-all-on-your-wrist/ | Time, Stars, And Tides, All On Your Wrist | Heidi Ulrich | [
"clock hacks",
"Wearable Hacks"
] | [
"chronograph",
"horology",
"sky chart",
"watch"
] | When asked ‘what makes you tick?’ the engineers at Vacheron Constantin
sure know what to answer
– and fast, too. Less than a year after last year’s horological kettlebell, the 960g Berkley Grand Complication, a new invention had to be worked out. And so, they delivered.
Vacheron Constantin’s Solaria Ultra Grand Complic... | 30 | 13 | [
{
"comment_id": "8151393",
"author": "ono",
"timestamp": "2025-07-18T20:14:14",
"content": "Oh, wonderful! Now I want a 3D-printed one out of PLA. Does not have to be wearable, though…",
"parent_id": null,
"depth": 1,
"replies": []
},
{
"comment_id": "8151400",
"author": "Mar... | 1,760,371,481.657454 | ||
https://hackaday.com/2025/07/18/2025-one-hertz-challenge-hp-logic-probe-brought-into-the-future/ | 2025 One-Hertz Challenge: HP Logic Probe Brought Into The Future | Lewin Day | [
"contests",
"Tool Hacks"
] | [
"2025 Hackaday One Hertz Challenge",
"hewlett packard",
"HP",
"logic",
"logic probe"
] | [Robert Morrison] had an ancient HP 545A logic probe, which was great for debugging SMT projects. The only problem was that being 45 years old, it wasn’t quite up to scratch when it came to debugging today’s faster circuitry. Thus,
he hacked it to do better
, and entered it in our 2025 One Hertz Challenge to boot!
[Rob... | 3 | 3 | [
{
"comment_id": "8151461",
"author": "Andrew",
"timestamp": "2025-07-19T01:59:01",
"content": "My dad worked for HP from 1980-2002, and he’s got one of these that I am pretty sure he got about the time he started working there. The tip is bent because 7 year old me was a jerk but the last time I plu... | 1,760,371,481.231175 | ||
https://hackaday.com/2025/07/17/a-neural-net-for-a-graphing-calculator/ | A Neural Net For A Graphing Calculator? | Navarre Bartz | [
"Artificial Intelligence",
"handhelds hacks",
"Machine Learning"
] | [
"calculator",
"graphics calculator",
"neural network",
"texas instruments",
"ti-84"
] | Machine learning and neural nets can be pretty handy, and people continue to push the envelope of what they can do both in high end server farms as well as slower systems. At the extreme end of the spectrum is [ExploratoryStudios]’s
Hermes Optimus Neural Net for a TI-84 Plus Silver Edition
.
This neural net is setup as... | 3 | 1 | [
{
"comment_id": "8151080",
"author": "RetepV",
"timestamp": "2025-07-18T09:57:10",
"content": "Works on my TI-84 Plus, no Silver Edition needed. Just needs a lot of memory.Although I’m also not sure if it works correctly. The library contains the word ‘BACK’. And if I try to classify ‘BOCK’, I would... | 1,760,371,481.325648 | ||
https://hackaday.com/2025/07/16/vintage-hardware-find-includes-time-capsule-of-data/ | Vintage Hardware Find Includes Time Capsule Of Data | Bryan Cockfield | [
"Retrocomputing"
] | [
"bbs",
"DEC",
"emulator",
"hardware",
"messageboard",
"retrocomputing",
"SIMH",
"vaxstation ii",
"virtualization"
] | Before social media brought the Internet to the masses, and before even Napster, ICQ, and AIM gave those with a phone line a reason to connect online at all, those who went online often went to a BBS messageboard. By modern standards these text-only environments would have been extremely limited, with only weather upda... | 5 | 3 | [
{
"comment_id": "8150577",
"author": "Matt",
"timestamp": "2025-07-17T05:33:52",
"content": "Door games were the best part once yakking with mates online got old. Blobs, operation overkill II.",
"parent_id": null,
"depth": 1,
"replies": []
},
{
"comment_id": "8150639",
"autho... | 1,760,371,481.184167 | ||
https://hackaday.com/2025/07/16/this-ssd-will-self-destruct-in-ten-seconds/ | This SSD Will Self Destruct In Ten Seconds… | Al Williams | [
"Security Hacks"
] | [
"flash memory",
"self destruct"
] | In case you can’t wait for your flash memory to die from write cycling,
TeamGroup
now has a drive that, via software or hardware, can
destroy its own flash chips
with a surge of voltage. If you wonder why you might want this, there are military applications where how you destroy a piece of equipment is right up there i... | 16 | 9 | [
{
"comment_id": "8150539",
"author": "tomas316",
"timestamp": "2025-07-17T02:38:46",
"content": "You’re too good for a $50 microwave?!",
"parent_id": null,
"depth": 1,
"replies": [
{
"comment_id": "8150554",
"author": "Eric",
"timestamp": "2025-07-17T03:49:1... | 1,760,371,481.382021 | ||
https://hackaday.com/2025/07/16/opening-a-six-lock-safe-with-one-key-using-brunnian-links/ | Opening A Six-Lock Safe With One Key Using Brunnian Links | Maya Posch | [
"Misc Hacks",
"Science"
] | [
"brunnian link",
"knots"
] | Brunnian links are a type of nontrivial link – or knot – where multiple linked loops become unlinked if a single loop is cut or removed. Beyond ‘fun’ disentanglement toys and a tantalizing subject of academic papers on knot theory, it can also be used for practical applications, as demonstrated by [Anthony Francis-Jone... | 6 | 3 | [
{
"comment_id": "8150516",
"author": "Bigfoot_T",
"timestamp": "2025-07-17T01:40:57",
"content": "What a good lad, I was impressed when he took the time to put it back together – shows that he wanted to properly understand the linkage.",
"parent_id": null,
"depth": 1,
"replies": []
},
... | 1,760,371,481.474139 | ||
https://hackaday.com/2025/07/16/mini-car-racing-game-really-shows-off-multicolor-printing/ | Mini Car Racing Game Really Shows Off Multicolor Printing | Donald Papp | [
"Games",
"how-to"
] | [
"3d printed",
"arcade",
"belt",
"driving simulator",
"electromechanical",
"print in place",
"treadmill"
] | Quality 3D printing is a common hobbyist tool nowadays, and
[wontonnn]’s
mini arcade car racing game
really shows off how 3D printing can bring parts from functional to fantastic. There are quite a few details we like in [wontonn]’s design, so let’s take a closer look.
The mini mechanical game is one of those treadmill... | 12 | 6 | [
{
"comment_id": "8150459",
"author": "G-man",
"timestamp": "2025-07-16T23:04:21",
"content": "That’s a lovely looking piece of kit!",
"parent_id": null,
"depth": 1,
"replies": []
},
{
"comment_id": "8150475",
"author": "Ken C",
"timestamp": "2025-07-16T23:45:58",
"con... | 1,760,371,481.287272 | ||
https://hackaday.com/2025/07/16/floss-weekly-episode-841-drupal-and-ai-the-right-tool-for-everything/ | FLOSS Weekly Episode 841: Drupal And AI: The Right Tool For Everything | Jonathan Bennett | [
"Hackaday Columns",
"Podcasts"
] | [
"artifical intelligence",
"Drupal",
"FLOSS Weekly"
] | This week
Jonathan
and
Katherine
talk with
Jamie Abrahams
about Drupal, and how AI just makes sense. No, really. Jamie makes a compelling case that Drupal is a really good tool for building AI workflows. We cover security, personal AI, and more!
https://www.drupal.org/u/yautja_cetanu
https://www.drupal.org/project/ai
h... | 1 | 1 | [
{
"comment_id": "8150448",
"author": "Dude",
"timestamp": "2025-07-16T22:26:49",
"content": "Moving manually written things into structured data by AI seems like a cool thing until you realize that there’s an equal lack of standards over there and everyone wants to use their own formatting and encap... | 1,760,371,481.767087 | ||
https://hackaday.com/2025/07/16/mach-cutoff-bending-the-sonic-boom/ | Mach Cutoff: Bending The Sonic Boom | Lewin Day | [
"Hackaday Columns",
"Science"
] | [
"mach cutoff",
"supersonic",
"supersonic flight"
] | Supersonic air travel is great if you want to get somewhere quickly. Indeed, the Concorde could rush you from New York to London in less than three and a half hours, over twice as fast as a conventional modern airliner. Despite the speed, though, supersonic passenger service has never really been sustainable thanks to ... | 28 | 7 | [
{
"comment_id": "8150330",
"author": "SteveS",
"timestamp": "2025-07-16T17:15:44",
"content": "Ugg.Commercial supersonic again. This time in a fun-sized private jet format.I don’t mean to be “that guy”. I love technology, I love aerospace stuff. I love things that go boom. But the biggest problem wi... | 1,760,371,481.893072 | ||
https://hackaday.com/2025/07/17/esp32-plugs-in-to-real-time-crypto-prices/ | ESP32 Plugs In To Real-Time Crypto Prices | Bryan Cockfield | [
"Microcontrollers",
"News"
] | [
"crypto",
"custom display",
"dashboard",
"ESP32",
"touchscreen"
] | In today’s high-speed information overload environment, we often find ourselves with too much data to take in at once, causing us to occasionally miss out on opportunities otherwise drowned out in noise. None of this is more evident in the realm of high-speed trading, whether it’s for stocks, commodities, or even crypt... | 8 | 5 | [
{
"comment_id": "8151061",
"author": "anon",
"timestamp": "2025-07-18T09:17:06",
"content": "this stuff should not be allowed here",
"parent_id": null,
"depth": 1,
"replies": [
{
"comment_id": "8151100",
"author": "Richard",
"timestamp": "2025-07-18T10:39:10... | 1,760,371,481.810984 | ||
https://hackaday.com/2025/07/17/building-a-stirling-engine-bike/ | Building A Stirling Engine Bike | John Elliot V | [
"3d Printer hacks",
"cnc hacks",
"Engine Hacks",
"hardware",
"Transportation Hacks"
] | [
"bicycle",
"stirling engine"
] | Over on his YouTube channel [Tom Stanton] shows us
how to build a Stirling Engine for a bike
.
A
Stirling Engine
is a heat engine, powered by the expansion and contraction of a working fluid (such as air) which is heated and cooled in a cycle. In the video [Tom] begins by demonstrating the Stirling Engine with some mod... | 27 | 6 | [
{
"comment_id": "8150891",
"author": "craig",
"timestamp": "2025-07-17T20:28:52",
"content": "“Includes paid promotion”Also- I can’t fathom how this works. Stirling engines function on a heat differential. I skimmed the video and cannot see where that heat differential is generated. In models a can... | 1,760,371,481.970213 | ||
https://hackaday.com/2025/07/17/2025-one-hertz-challenge-building-a-better-jumping-bean/ | 2025 One Hertz Challenge: Building A Better Jumping Bean | Seth Mabbott | [
"Microcontrollers",
"Toy Hacks"
] | [
"2025 Hackaday One Hertz Challenge",
"jumping",
"vibration motor"
] | Do you feel nostalgia for a childhood novelty toy that had potential but ultimately fell short of its promise? Do you now have the skills to go make a better version of that toy to satisfy your long-held craving? [ExpensivePlasticCrap] does and has set off on a mission to
make a better jumping bean
.
Jumping beans, the... | 4 | 3 | [
{
"comment_id": "8150866",
"author": "Michel",
"timestamp": "2025-07-17T19:12:09",
"content": "What about a 555 ? :-D",
"parent_id": null,
"depth": 1,
"replies": [
{
"comment_id": "8151134",
"author": "marmakoide",
"timestamp": "2025-07-18T11:30:58",
... | 1,760,371,482.063853 | ||
https://hackaday.com/2025/07/17/the-apollo-soyuz-legacy-lives-on-fifty-years-later/ | The Apollo–Soyuz Legacy Lives On, Fifty Years Later | Tom Nardi | [
"History",
"Space"
] | [
"apollo",
"Apollos Soyuz Test Project",
"docking",
"docking port",
"Soyuz",
"space race"
] | On this date in 1975, a Soviet and an American shook hands. Even for the time period, this wouldn’t have been a big deal if it wasn’t for the fact that it happened approximately 220 kilometers (136 miles) over the surface of the Earth.
Crew of the Apollo–Soyuz Test Project
Although their spacecraft actually launched a ... | 11 | 5 | [
{
"comment_id": "8150840",
"author": "Dielectric",
"timestamp": "2025-07-17T18:05:33",
"content": "Just for fun, check out the “ISS Fan Club”. The ISS is sending slow-scan TV images all week. Then pull up your favorite ISS tracker and figure out when it will be overhead. The signal is crazy strong s... | 1,760,371,482.024651 | ||
https://hackaday.com/2025/07/17/protoweb-browsing-the-information-superhighway-like-its-1995/ | ProtoWeb: Browsing The Information Superhighway Like It’s 1995 | John Elliot V | [
"internet hacks",
"Retrocomputing"
] | [
"FTP Proxy",
"HTTP Proxy",
"Information Superhighway",
"ProtoWeb"
] | Feeling nostalgic? Weren’t around in the 90s but wonder what it was like? ProtoWeb has you covered! Over on his YouTube channel [RetroTech Chris] shows you
how to browse the web like it’s 1995
.
The service that [RetroTech Chris] introduces is on the web over here:
protoweb.org
. The way it works is that you configure ... | 19 | 7 | [
{
"comment_id": "8150764",
"author": "Ian",
"timestamp": "2025-07-17T15:45:07",
"content": "“There are several things we miss, but waiting for websites to load isn’t one of them! ”I’d love to experience your fantasy Internet where web sites don’t load 500MB of garbage and have 18 different scripts w... | 1,760,371,482.126805 | ||
https://hackaday.com/2025/07/17/a-field-guide-to-the-north-american-cold-chain/ | A Field Guide To The North American Cold Chain | Dan Maloney | [
"Engineering",
"Featured",
"Interest",
"Slider"
] | [
"cold chain",
"Field Guide",
"food",
"freezer",
"logistics",
"produce",
"refrigerator",
"shipping",
"supply chain"
] | So far in the “Field Guide” series, we’ve mainly looked at critical infrastructure systems that, while often blending into the scenery, are easily observable once you know where to look. From the
substations
,
transmission lines
, and
local distribution systems
that make up the electrical grid to
cell towers
and even
w... | 22 | 7 | [
{
"comment_id": "8150731",
"author": "Ostracus",
"timestamp": "2025-07-17T14:30:04",
"content": "Remember working it. It was kind of nice during summer though.",
"parent_id": null,
"depth": 1,
"replies": []
},
{
"comment_id": "8150747",
"author": "shinsukke",
"timestamp":... | 1,760,371,482.192706 | ||
https://hackaday.com/2025/07/17/this-service-life-study-really-grinds-our-gears/ | This Service Life Study Really Grinds Our Gears | Tyler August | [
"3d Printer hacks",
"Science"
] | [
"3D printed gears",
"destructive testing",
"lifetime"
] | 3D printing is arguably over-used in the maker community. It’s just so easy to run off a quick prototype and then… well, it’s good enough, right? Choosing the right plastic can go a long way to making sure your “good enough” prototype really is good enough for long term use. If you’re producing anything with gearing, y... | 69 | 22 | [
{
"comment_id": "8150651",
"author": "Clara Hobbs",
"timestamp": "2025-07-17T11:03:03",
"content": "One word for 3D printing good gears: nylon.",
"parent_id": null,
"depth": 1,
"replies": [
{
"comment_id": "8150693",
"author": "ukezi",
"timestamp": "2025-07-... | 1,760,371,482.311139 | ||
https://hackaday.com/2025/07/18/hackaday-podcast-episode-329-ai-surgery-a-prison-camp-lathe-and-a-one-hertz-four-fer/ | Hackaday Podcast Episode 329: AI Surgery, A Prison Camp Lathe, And A One Hertz Four-Fer | Tom Nardi | [
"Hackaday Columns",
"Podcasts"
] | [
"Hackaday Podcast"
] | Join Hackaday Editors Elliot Williams and Tom Nardi as they talk about their favorite hacks and stories from the previous week. They’ll start things off with a small Supercon update, and go right into fusion reactors, AI surgeons, planned obsolescence, and robotic cats and dogs. They’ll also go over several entries fro... | 3 | 1 | [
{
"comment_id": "8151415",
"author": "Dude",
"timestamp": "2025-07-18T21:24:57",
"content": "Making herringbone gears by traditional manufacturing techniques isn’t exceedingly difficult. It’s just that they’re more commonly cast rather than machined because it’s more conductive to mass manufacturing... | 1,760,371,482.354643 | ||
https://hackaday.com/2025/07/18/unlocking-the-potential-of-a-no-name-handheld-game/ | Unlocking The Potential Of A No-Name Handheld Game | Bryan Cockfield | [
"Games"
] | [
"gaming",
"handheld",
"raspberry pi",
"retropie",
"upgrades",
"zero 2w"
] | The rise of inexpensive yet relatively powerful electronics has enabled a huge array of computing options that would have been unheard of even two decades ago. A handheld gaming PC with hours of battery life, for example, would have been impossible or extremely expensive until recently. But this revolution has also ena... | 9 | 4 | [
{
"comment_id": "8151306",
"author": "jenningsthecat",
"timestamp": "2025-07-18T16:04:37",
"content": "“Ultimate Brick Game” strikes me as a particularly inauspicious name for an electronic device of any kind…",
"parent_id": null,
"depth": 1,
"replies": [
{
"comment_id": "8... | 1,760,371,482.396075 | ||
https://hackaday.com/2025/07/18/this-week-in-security-trains-fake-homebrew-and-ai-auto-hacking/ | This Week In Security: Trains, Fake Homebrew, And AI Auto-Hacking | Jonathan Bennett | [
"Hackaday Columns",
"Security Hacks"
] | [
"homebrew",
"This Week in Security",
"trains",
"Vibe Researching"
] | There’s a
train vulnerability
making the rounds this week. The research comes from [midwestneil], who first discovered an issue way back in 2012, and tried to raise the alarm.
Turns out you can just hack any train in the USA and take control over the brakes. This is CVE-2025-1727 and it took me 12 years to get this pub... | 7 | 5 | [
{
"comment_id": "8151233",
"author": "WTF Detector",
"timestamp": "2025-07-18T14:02:56",
"content": "Unless the intention is to imply that the trains are break-dancing, I believe the term is “braking system”, not “breaking system”.",
"parent_id": null,
"depth": 1,
"replies": [
{
... | 1,760,371,482.445137 | ||
https://hackaday.com/2025/07/18/a-vulnerable-simulator-for-drone-penetration-testing/ | A Vulnerable Simulator For Drone Penetration Testing | Aaron Beckendorf | [
"drone hacks",
"Security Hacks"
] | [
"drone",
"drone security",
"penetration testing",
"security"
] | The old saying that the best way to learn is by doing holds as true for penetration testing as for anything else, which is why intentionally vulnerable systems like the Damn Vulnerable Web Application are so useful. Until now, however, there hasn’t been a practice system
for penetration testing with drones
.
The Damn V... | 7 | 3 | [
{
"comment_id": "8151131",
"author": "shinsuke",
"timestamp": "2025-07-18T11:29:15",
"content": "I would like to bring to attention that Ardupilot, the beloved quadcopter/boat software is being used in actual warfare as we speak.Its truly a shame, something made for enjoyment of students and hobbyis... | 1,760,371,482.486116 | ||
https://hackaday.com/2025/07/18/mr-browser-is-the-package-manager-classic-macs-never-had/ | MR Browser Is The Package Manager Classic Macs Never Had | Tyler August | [
"Mac Hacks",
"Retrocomputing"
] | [
"classic mac",
"m68k",
"ppc",
"retrocomputing",
"software repositories"
] | Homebrew bills itself as the package manager MacOS never had (conveniently ignoring MacPorts) but they leave the PPC crowd criminally under-served, to say nothing of the 68k gang. Enter [that-ben] with
MR Browser, a simple utility to fetch software from Macintosh Repository
for computers too old to hit up the website.
... | 2 | 2 | [
{
"comment_id": "8151184",
"author": "emuboy",
"timestamp": "2025-07-18T12:55:24",
"content": "Oh this is a godsend.",
"parent_id": null,
"depth": 1,
"replies": []
},
{
"comment_id": "8151553",
"author": "Joshua",
"timestamp": "2025-07-19T12:34:17",
"content": "Upgrad... | 1,760,371,482.532998 | ||
https://hackaday.com/2025/07/17/improve-your-kicad-productivity-with-these-considered-shortcut-keys/ | Improve Your KiCad Productivity With These Considered Shortcut Keys | John Elliot V | [
"PCB Hacks",
"Software Hacks"
] | [
"keyboard shortcuts",
"keymaps",
"KiCAD",
"pcb layout",
"Schematic Capture"
] | [Pat Deegan] from
Psychogenic Technologies
shows us
two KiCad tips to save a million clicks
, and he made a video to support it, embedded below.
In the same way that it makes sense for you to learn to touch type if you’re going to be using a computer a lot, it makes sense for you to put some thought and effort into you... | 15 | 9 | [
{
"comment_id": "8151033",
"author": "jpa",
"timestamp": "2025-07-18T06:33:46",
"content": "I also feel that KiCAD’s default keyboard shortcuts are not very well laid out, so I need to customize them. It also seems to often forget many of the keys in major upgrades.The keymaps here would be nice, bu... | 1,760,371,482.687102 | ||
https://hackaday.com/2025/07/17/8-core-arm-pocket-computer-runs-nixos/ | 8-Core ARM Pocket Computer Runs NixOS | Tyler August | [
"Phone Hacks"
] | [
"linux phone",
"mobile-NixOS",
"oneplus 6",
"postmarketos"
] | What has 8 ARM cores, 8 GB of RAM, fits in a pocket, and runs NixOS? It’s no pi-clone SBC, but [MWLabs]’s smartphone–
a OnePlus 6, to be precise.
The video embedded below, and the git link above, are [MWLabs]’s walk-through for loading the mobile version of Nix onto the cell phone, turning it into a tiny-screened Linux... | 9 | 5 | [
{
"comment_id": "8151006",
"author": "echodelta",
"timestamp": "2025-07-18T04:08:30",
"content": "Ouch, stuck in the raspberry bush!",
"parent_id": null,
"depth": 1,
"replies": []
},
{
"comment_id": "8151044",
"author": "rthrthrt",
"timestamp": "2025-07-18T07:15:03",
... | 1,760,371,482.730903 | ||
https://hackaday.com/2025/07/15/pulling-at-threads-with-the-flipper-zero/ | Pulling At Threads With The Flipper Zero | Adam Zeloof | [
"home hacks",
"Microcontrollers",
"Network Hacks"
] | [
"flipper zero",
"home automation",
"Matter",
"thread"
] | Gone are the days when all smart devices were required an internet uplink. The WiFi-enabled IoT fad, while still upon us (no, my coffee scale doesn’t need to be on the network, dammit!) has begun to give way to low-power protocols actually designed for this kind of communication, such as ZigBee, and more recently, Thre... | 13 | 5 | [
{
"comment_id": "8149911",
"author": "Tim Andersson",
"timestamp": "2025-07-15T20:17:10",
"content": "How is it better than bog standard 433 as used in garage door remotes? I don’t understand.",
"parent_id": null,
"depth": 1,
"replies": [
{
"comment_id": "8149920",
... | 1,760,371,482.786149 | ||
https://hackaday.com/2025/07/15/2025-one-hertz-challenge-metronalmost-is-gunning-for-last-place/ | 2025 One Hertz Challenge: Metronalmost Is Gunning For Last Place | Tyler August | [
"clock hacks",
"contests"
] | [
"ESP-12E",
"gaussian",
"metronome"
] | We’ve just begun to receive entries to the One Hertz Challenge, but we already have an entry by [Mike Coats] that explicitly demands to be awarded last place:
the Metronalmost, a metronome that will never, ever, tick at One Hertz
.
Unlike a real metronome that has to rely on worldly imperfections to potentially vary th... | 18 | 6 | [
{
"comment_id": "8149876",
"author": "smellsofbikes",
"timestamp": "2025-07-15T17:54:14",
"content": "Now I want to do this electromechanically, with a classic metronome that has some electromagnets to tweak the timing, so it’s accurate everywhere else but right around 1hz it starts clicking with a ... | 1,760,371,482.843137 | ||
https://hackaday.com/2025/07/15/a-collection-of-lightning-detectors/ | A Collection Of Lightning Detectors | Al Williams | [
"Radio Hacks"
] | [
"lightning detector"
] | You would think detecting lightning would be easy. Each lightning bolt has a staggering amount of power, and, clearly, you can hear the results on any radio. But it is possible to optimize a simple receiver circuit to specifically pick up lightning. That’s exactly what [Wenzeltech] shows in
a page with several types of... | 20 | 10 | [
{
"comment_id": "8149822",
"author": "dk",
"timestamp": "2025-07-15T15:50:09",
"content": "Want to see a couple detectors in action? Seehttps://www.blitzortung.org/de/live_lightning_maps.php",
"parent_id": null,
"depth": 1,
"replies": [
{
"comment_id": "8149949",
"a... | 1,760,371,482.951845 | ||
https://hackaday.com/2025/07/15/the-fight-to-save-lunar-trailblazer/ | The Fight To Save Lunar Trailblazer | Tom Nardi | [
"Current Events",
"Featured",
"Slider",
"Space"
] | [
"Deep Space Network",
"moon",
"nasa"
] | After the fire and fury of liftoff, when a spacecraft is sailing silently through space, you could be forgiven for thinking the hard part of the mission is over. After all, riding what’s essentially a domesticated explosion up and out of Earth’s gravity well very nearly pushes physics and current material science to th... | 42 | 5 | [
{
"comment_id": "8149788",
"author": "Joshua",
"timestamp": "2025-07-15T14:18:58",
"content": "Should have used silver-zinc batteries (charged by solar panels).They apparaently had worked reliable some 65 years ago.https://en.wikipedia.org/wiki/Venera_1https://en.wikipedia.org/wiki/Silver_zinc_batte... | 1,760,371,483.034703 | ||
https://hackaday.com/2025/07/15/will-hp-create-a-carfax-system-for-pcs/ | Will HP Create A Carfax System For PCs? | Bryan Cockfield | [
"computer hacks"
] | [
"carfax",
"data",
"firmware",
"hardware",
"HP",
"use history"
] | When buying used cars there are plenty of ways to check on their history. In many countries there are systems, like Carfax for parts of North America and Europe, that can provide crash history in some situations and alert a potential buyer of hidden damage. Not so for computers, where anyone can run an intensive mining... | 23 | 12 | [
{
"comment_id": "8149700",
"author": "A",
"timestamp": "2025-07-15T11:35:33",
"content": "I can’t imagine Microsoft wanting a crash history that survives a reinstall. ;)",
"parent_id": null,
"depth": 1,
"replies": []
},
{
"comment_id": "8149714",
"author": "NFM",
"timesta... | 1,760,371,483.253887 | ||
https://hackaday.com/2025/07/15/a-chip8-emulator-for-68000-based-macs/ | A Chip8 Emulator For 68000-based Macs | Tyler August | [
"Retrocomputing"
] | [
"Chip8Emulator",
"macintosh 512k",
"Motorola 68000",
"retrocomputing"
] | Among this crowd, it’s safe to say that the original 68000 Macintosh computers need no introduction, but it’s possible some of you aren’t familiar with Chip8. It was an interpreted virtual machine originally created for the COSMAC VIP microcomputer by [Joe Weisbecker] way back in 1977. It enabled coding simple games on... | 22 | 6 | [
{
"comment_id": "8149638",
"author": "Joshua",
"timestamp": "2025-07-15T09:22:59",
"content": "Hmpf. By-passing firmware and accessing hardware directly used to be “bad practice” according to programming guidelines.That’s why the Amiga couldn’t evolve and why advancedd MS-DOS compatibles didn’t took... | 1,760,371,483.137739 | ||
https://hackaday.com/2025/07/14/quasi-quantifying-qubits-for-100-quid/ | Quasi-Quantifying Qubits For 100 Quid | Adam Zeloof | [
"hardware",
"Raspberry Pi",
"Science"
] | [
"NMR",
"quantum computing",
"quantum physics",
"raspberry pi"
] | As part of his multi-year project to build a quantum computer, hacakday.io poster [skywo1f] has shared with us his most recent accomplishment — a
Nuclear Magnetic Resonance Spectrometer
, which he built for less than $100.
The
NMR spectrometer
is designed to disturb protons, which naturally line up according to the Ear... | 3 | 2 | [
{
"comment_id": "8149607",
"author": "Davide Gessa",
"timestamp": "2025-07-15T07:58:10",
"content": "I follow this project since two years, very impressive (y) I hope one day every one can build their DIY quantum computer like our fathers did in the last century :)",
"parent_id": null,
"dept... | 1,760,371,483.076532 | ||
https://hackaday.com/2025/07/14/introducing-poola-filament-grass-fiber-reinforced-pla/ | Introducing PooLA Filament: Grass Fiber-Reinforced PLA | Maya Posch | [
"3d Printer hacks"
] | [
"3d printer filament",
"polylactic acid"
] | We’re probably all familiar with adding wood dust, hemp and carbon fibers to PLA filament, but there are so many other fillers one could add. During the completely unrelated recent heatwave in Germany, [Stefan] from
CNCKitchen
decided to give a new type of biodegradable filler type a shot by scooping some freshly dried... | 25 | 10 | [
{
"comment_id": "8149540",
"author": "Zaphod Harkonnen",
"timestamp": "2025-07-15T02:27:25",
"content": "I admit it took me a while to figure out the title said “Grass-reinforced” and not “Glass-reinforced” lol",
"parent_id": null,
"depth": 1,
"replies": [
{
"comment_id": "... | 1,760,371,483.192632 | ||
https://hackaday.com/2025/07/14/record-changer-spins-round-and-round/ | Record Changer Spins Round And Round | Al Williams | [
"Teardown"
] | [
"45 rpm",
"RCA",
"record player"
] | There was a time when all the cool kids had a 45 RPM record player. [RF Burns]
picked up a 1950s-era player from RCA
. However, it needed a lot of work. The good news? We get to see the teardown and the result in a two-part video series, which you can see below. If you are looking for the schematic, you’ll have to wai... | 1 | 1 | [
{
"comment_id": "8149751",
"author": "Garth",
"timestamp": "2025-07-15T13:08:23",
"content": "It’s great to see a restoration like this. Great job ! There is so much old “tech” like this that has faded away except for the rare finds at thrift shops and flea markets. It seems no one cares. I have eve... | 1,760,371,483.291397 | ||
https://hackaday.com/2025/07/14/do-you-trust-this-ai-for-your-surgery/ | Do You Trust This AI For Your Surgery? | Ian Bos | [
"Medical Hacks",
"News"
] | [
"ai",
"bioengineering",
"ChatGPT",
"robotic surgery"
] | If you are looking for the perfect instrument to start a biological horror show in our age of AI, you have come to the right place. Researchers at Johns Hopkins University have successfully used
AI-guided robotics to perform surgical procedures
. So maybe a bit less dystopian, but the possibilities are endless.
Pig par... | 52 | 13 | [
{
"comment_id": "8149436",
"author": "Cad the Mad",
"timestamp": "2025-07-14T20:17:44",
"content": "Definitely. There’s still humans in the loop so the introduction of computer intelligence only adds additional layers of protection against human error.Same reason why I’d rather a surgical robot than... | 1,760,371,483.570625 | ||
https://hackaday.com/2025/07/14/2025-one-hertz-challenge-valvano-clock-makes-the-seconds-count/ | 2025 One Hertz Challenge: Valvano Clock Makes The Seconds Count | Tyler August | [
"clock hacks",
"contests"
] | [
"arduino nano",
"DS3231 RTC",
"oled display"
] | A man named [Jim Valvano] once said “There are 86,400 seconds in a day. It’s up to you to decide what to do with them.” — while we couldn’t tell you who [Jim Valvano] was without a google search*, his math checks out. The quote was
sufficiently
inspirational to inspire [danjovic] to create
a clock count those seconds p... | 3 | 2 | [
{
"comment_id": "8149457",
"author": "asheets",
"timestamp": "2025-07-14T21:01:28",
"content": "You don’t know who Jimmy V was? He and NCAA basketball were robbed of way to many seconds…",
"parent_id": null,
"depth": 1,
"replies": [
{
"comment_id": "8150442",
"auth... | 1,760,371,483.339327 | ||
https://hackaday.com/2025/07/14/robots-want-the-jobs-you-cant-do/ | Robots Want The Jobs You Can’t Do | Al Williams | [
"Hackaday Columns",
"Robots Hacks",
"Slider"
] | [
"pipe",
"pipeline",
"pipeline pig",
"pipeline robot"
] | There’s something ominous about robots taking over jobs that humans are suited to do. Maybe you don’t want a job turning a wrench or pushing a broom, but someone does. But then there are the jobs no one wants to do or physically can’t do. Robots fighting fires, disarming bombs, or cleaning up nuclear reactors is someth... | 11 | 9 | [
{
"comment_id": "8149399",
"author": "concretedog",
"timestamp": "2025-07-14T18:04:44",
"content": "Some superb bots in the various linked videos there. I always sort of lament that this stuff is almost always in the student domain, I’d love to see some opensource communities I could interact with o... | 1,760,371,483.782163 | ||
https://hackaday.com/2025/07/14/coroutines-in-c/ | Coroutines In C | Al Williams | [
"Software Development"
] | [
"c++",
"coroutine",
"protothreads"
] | It is virtually a rite of passage for C programmers to realize that they can write their own cooperative multitasking system. C is low-level enough, and there are several ways to approach the problem, so, like Jedi light sabers, each one is a little bit different. [Christoph Wolcher] took his turn, and not only is his ... | 20 | 11 | [
{
"comment_id": "8149365",
"author": "Cad the Mad",
"timestamp": "2025-07-14T16:21:57",
"content": "You’re not kidding about it being a rite of passage. This brought back memories.Back in grad school I ran into the problem for the first time because of the limitations of Arduino. On bare metal micro... | 1,760,371,483.628856 | ||
https://hackaday.com/2025/07/14/hacking-when-it-counts-diy-prosthetics-and-the-prison-camp-lathe/ | Hacking When It Counts: DIY Prosthetics And The Prison Camp Lathe | Dan Maloney | [
"Engineering",
"Featured",
"History",
"Interest",
"Slider"
] | [
"civil engineering",
"hacking when it counts",
"lathe",
"limb",
"machine tools",
"POW",
"prison",
"prosthetic",
"social engineering",
"wwii"
] | There are a lot of benefits to writing for Hackaday, but hands down one of the best is getting paid to fall down fascinating rabbit holes. These often — but not always — delightful journeys generally start with chance comments by readers, conversations with fellow writers, or just the random largesse of The Algorithm. ... | 13 | 7 | [
{
"comment_id": "8149313",
"author": "a_do_z",
"timestamp": "2025-07-14T14:36:58",
"content": "Somewhere in this story is a movie I’d watch.",
"parent_id": null,
"depth": 1,
"replies": [
{
"comment_id": "8149437",
"author": "Joel",
"timestamp": "2025-07-14T2... | 1,760,371,483.735799 | ||
https://hackaday.com/2025/07/16/blu-ray-won-but-at-what-cost/ | Blu-ray Won, But At What Cost? | John Elliot V | [
"Laser Hacks",
"Video Hacks"
] | [
"blu-ray",
"Masanobu Yamamoto",
"personal media",
"physical media",
"sony"
] | Over on their substack [ObsoleteSony] has a new article:
The Last Disc: How Blu-ray Won the War but Lost the Future
.
In this article the author takes us through the history of Blu-ray media and how under Sony’s stewardship it successfully defeated the competing format of the time,
HD DVD
. Sony started behind the eigh... | 73 | 24 | [
{
"comment_id": "8150300",
"author": "Natalie RMDP",
"timestamp": "2025-07-16T16:09:51",
"content": "I’d love to see commercial physical media get more love.",
"parent_id": null,
"depth": 1,
"replies": [
{
"comment_id": "8150368",
"author": "hjf",
"timestamp... | 1,760,371,484.135568 | ||
https://hackaday.com/2025/07/16/the-dew-line-remembered/ | The DEW Line Remembered | Al Williams | [
"Featured",
"History",
"Slider",
"Wireless Hacks"
] | [
"cold war",
"DEW Line",
"history",
"radar"
] | The DEW line
was one of three radar early warning systems of the time.
If you grew up in the middle of the Cold War, you probably remember hearing about the Distant Early Warning line between duck-and-cover drills. The United States and Canada built the DEW line radar stations throughout the Arctic to detect potential ... | 20 | 15 | [
{
"comment_id": "8150268",
"author": "Ostracus",
"timestamp": "2025-07-16T15:16:11",
"content": "Some stations were upgraded and incorporated into NWS.",
"parent_id": null,
"depth": 1,
"replies": []
},
{
"comment_id": "8150280",
"author": "Sloppy Moses",
"timestamp": "202... | 1,760,371,483.957003 | ||
https://hackaday.com/2025/07/16/caltech-scientists-make-producing-plastics-from-co2-more-efficient/ | Caltech Scientists Make Producing Plastics From CO2 More Efficient | Maya Posch | [
"green hacks",
"Science"
] | [
"carbon dioxide",
"carbon sequestration",
"plastics"
] | For decades there has been this tantalizing idea being pitched of pulling CO
2
out of the air and using the carbon molecules for something more useful, like making plastics. Although this is a fairly simple process, it is also remarkably inefficient. Recently Caltech researchers have managed to
boost the efficiency som... | 26 | 6 | [
{
"comment_id": "8150195",
"author": "Stanson",
"timestamp": "2025-07-16T12:36:10",
"content": "Wait a second. The most effective process of producing plastics from CO2 is here for billions years already. Plants perfectly do exactly that – consume CO2 and produce even two plastics – cellulose and li... | 1,760,371,484.028377 | ||
https://hackaday.com/2025/07/16/arduino-saves-heat-pump/ | Arduino Saves Heat Pump | Bryan Cockfield | [
"Arduino Hacks",
"green hacks"
] | [
"arduino",
"arduino mega",
"control",
"efficiency",
"Heat pump",
"inverter",
"repair",
"swimming pool"
] | For home HVAC systems, heat pumps seem to be the way of the future. When compared to electric heating they can be three to four times more efficient, and they don’t directly burn fossil fuels. They also have a leg up over standard air conditioning systems since they can provide both cooling and heating, and they can ev... | 29 | 11 | [
{
"comment_id": "8150071",
"author": "Jan",
"timestamp": "2025-07-16T08:26:15",
"content": "cool",
"parent_id": null,
"depth": 1,
"replies": [
{
"comment_id": "8150078",
"author": "Andrew",
"timestamp": "2025-07-16T08:46:22",
"content": "So hot right... | 1,760,371,484.205667 | ||
https://hackaday.com/2025/07/15/a-history-of-the-tandy-computers/ | A History Of The Tandy Computers | Al Williams | [
"Retrocomputing"
] | [
"radio shack",
"tandy",
"trs-80"
] | Radio Shack, despite being gone for a number of years, is still in our cultural consciousness. But do you know Tandy? And did you ever wonder how a leather company that started in 1919 became, briefly, a computer giant? Or even an electronics retailer? [Abort Retry Fail] has
the story
in
three
parts
, framed with their... | 22 | 11 | [
{
"comment_id": "8150006",
"author": "PPJ",
"timestamp": "2025-07-16T05:48:32",
"content": "“Did you ever wonder how a leather company started in 1919, because, briefly, a computer giant?”Did you mean “became”?",
"parent_id": null,
"depth": 1,
"replies": [
{
"comment_id": "... | 1,760,371,484.263986 | ||
https://hackaday.com/2025/07/15/wendelstein-7-x-sets-new-record-for-the-nuclear-fusion-triple-product/ | Wendelstein 7-X Sets New Record For The Nuclear Fusion Triple Product | Maya Posch | [
"Science"
] | [
"nuclear fusion",
"Stellerator",
"wendelstein 7-x"
] | Fusion product against duration, showing the Lawson criterion progress. (Credit: Dinklage et al., 2024, MPI for Plasma Physics)
In nuclear fusion, the triple product – also known as the Lawson criterion – defines the point at which a nuclear fusion reaction produces more power than is needed to sustain the fusion react... | 36 | 6 | [
{
"comment_id": "8149983",
"author": "Johnny H. Lee",
"timestamp": "2025-07-16T03:18:26",
"content": "Net break-even fusion is still 20 years away, but it’s really exciting that there’s actual progress now compared to 20 years ago.",
"parent_id": null,
"depth": 1,
"replies": [
{
... | 1,760,371,484.342472 | ||
https://hackaday.com/2025/07/15/usb-c-rainbow-ranger-sensing-volts-with-style/ | USB-C Rainbow Ranger: Sensing Volts With Style | Matt Varian | [
"hardware"
] | [
"USB C",
"USB Power Delivery",
"USB-C PD"
] | USB-C has enabled a lot of great things, most notably removing the no less than three attempts to plug in the cable correctly, but gone are the days of just 5V over those lines. [Meticulous Technologies] sent in their project to help easily identify what voltage your USB-C line is running at, the
USB VSense
.
The USB V... | 1 | 1 | [
{
"comment_id": "8149992",
"author": "chango",
"timestamp": "2025-07-16T04:24:47",
"content": "It needs an NE-2 bulb across Vbus labeled “TILT”",
"parent_id": null,
"depth": 1,
"replies": []
}
] | 1,760,371,484.378272 | ||
https://hackaday.com/2025/07/14/a-budget-quasi-direct-drive-motor-inpired-by-mits-mini-cheetah/ | A Budget Quasi-Direct-Drive Motor Inspired By MIT’s Mini Cheetah | Aaron Beckendorf | [
"hardware",
"Robots Hacks"
] | [
"actuator",
"actuators",
"quasi direct drive",
"robot actuator"
] | It’s an unfortunate fact that when a scientist at MIT describes an exciting new piece of hardware as “low-cost,” it might not mean the same thing as if a hobbyist had said it. [Caden Kraft] encountered this disparity when he was building a SCARA arm and needed good actuators. An actuator like those on MIT’s Mini Cheeta... | 27 | 5 | [
{
"comment_id": "8149253",
"author": "Steve",
"timestamp": "2025-07-14T11:27:18",
"content": "This isn’t hacking anymore, this is just a great example of good engineering on a budget by a talented and passionate individual. Very impressive and kudos for contributing the work to the public domain!",
... | 1,760,371,484.442652 | ||
https://hackaday.com/2025/07/14/explore-the-granddaddy-of-all-macs-with-lisagui/ | Explore The Granddaddy Of All Macs With LisaGUI | Tyler August | [
"Mac Hacks",
"Retrocomputing"
] | [
"Apple Lisa",
"emulator",
"javascript"
] | Sure, Apple’s Lisa wasn’t the first computer released with a graphical user interface — Xerox was years ahead with the Alto and the Star workstation — but Lisa was the first that came within the reach of mere mortals. Which doesn’t mean many mortals got their hands on one; with only about 10,000 sold, they were never c... | 23 | 8 | [
{
"comment_id": "8149230",
"author": "Joshua",
"timestamp": "2025-07-14T09:02:00",
"content": "Funny: The NCR PC4 series looked quite like Lisa and won German Design Award of 1985.https://www.oldsilicon.com/ncr-pc4Also, the Lisas had a second life as Macintosh XL computers.By help of various version... | 1,760,371,484.546655 | ||
https://hackaday.com/2025/07/13/citizen-science-is-all-fun-and-games/ | Citizen Science Is All Fun And Games | Al Williams | [
"Games",
"Science"
] | [
"cancer",
"citizen science"
] | You are probably familiar with initiatives like Seti@Home, where you donate unused computer power to some science project that needs computer cycles. [Jeff Yoshimi] wants to
borrow your most powerful computer
: your brain. The reason: cancer research.
[Jeff’s] recent book,
Gaming Cancer
, has three examples:
Eterna
,
F... | 7 | 5 | [
{
"comment_id": "8149212",
"author": "Trevor E. Pierre",
"timestamp": "2025-07-14T07:13:01",
"content": "Totally Citizen Science works best when it feels like fun. If it feels like a game, people actually want to join in, and that’s when the magic happens.",
"parent_id": null,
"depth": 1,
... | 1,760,371,484.484581 | ||
https://hackaday.com/2025/07/13/smart-coffee-table-to-guide-your-commute/ | Smart Coffee Table To Guide Your Commute | Ian Bos | [
"home hacks",
"Transportation Hacks"
] | [
"3d printed",
"cnc",
"raspberry pi",
"topographic"
] | One of the simple pleasures of life is enjoying a drive to work… only to get stuck in traffic that you could’ve known about if you just checked before your daily commute. Who are we kidding? There’s almost nothing worse. [Michael Rechtin] saw this as a great opportunity to spruce up his living room with something pract... | 8 | 5 | [
{
"comment_id": "8149193",
"author": "Oliver",
"timestamp": "2025-07-14T05:42:21",
"content": "Super idea. What I miss/wonder though is the current situation can be augmented with the predicted upcomming situation. On longer commutes, everything is fine now, but in 30 minutes from now, things may be... | 1,760,371,486.529554 | ||
https://hackaday.com/2025/07/13/hackaday-links-july-13-2025/ | Hackaday Links: July 13, 2025 | Dan Maloney | [
"Hackaday Columns",
"Hackaday links",
"Slider"
] | [
"45rpm",
"adapter",
"coal",
"cubesat",
"factyory tour",
"hackaday links",
"heathkit",
"hydrocarbons",
"kit",
"linesman",
"lp",
"mining",
"pcb",
"pole",
"quick-turn",
"rare-earth",
"record",
"REEs",
"stem",
"utility",
"vinyl",
"Wyoming"
] | There’s interesting news out of Wyoming, where a coal mine was opened this week. But the fact that it’s the first new coal mine in 50 years isn’t the big news — it’s the mine’s
abundance of rare earth elements
that’s grabbing the headlines.
As we’ve pointed out before
, rare earth elements aren’t actually all that rare... | 8 | 4 | [
{
"comment_id": "8149131",
"author": "Then",
"timestamp": "2025-07-14T02:22:46",
"content": "The cubesat kit is now listed at almost 8000$ :O",
"parent_id": null,
"depth": 1,
"replies": [
{
"comment_id": "8149226",
"author": "Bob",
"timestamp": "2025-07-14T0... | 1,760,371,486.23573 | ||
https://hackaday.com/2025/07/13/2025-one-hertz-challenge-ham-radio-foxhunt-transmitter/ | 2025 One Hertz Challenge: Ham Radio Foxhunt Transmitter | John Elliot V | [
"contests",
"Radio Hacks"
] | [
"2025 One Hertz Contest",
"foxhunting",
"ham radio"
] | [Jim Matthews] submitted his
Ham Radio foxhunt transmitter
project for the 2025 One Hertz Challenge.
This is a clever Spartan build. In order to create a radio beacon for use in a “fox hunt” [Jim] combined a
SR-T300
walkie talkie module with a phototransistor and oscillating LED circuit. The phototransistor and oscilla... | 9 | 2 | [
{
"comment_id": "8149125",
"author": "Joshua",
"timestamp": "2025-07-14T02:02:27",
"content": "Interesting! Here in Germany, fox hunting (foxoring) is common on 80m band.Often done via homebrew receivers.Foxes without a proper CW ID are so-called training foxes, I think.They’re basically an 3,57 MHz... | 1,760,371,486.189405 | ||
https://hackaday.com/2025/07/13/hurdy-posting-continues-with-the-balfolk-boombox-a-synth-gurdy/ | Hurdy-posting Continues With The Balfolk Boombox, A Synth Gurdy | Tyler August | [
"Musical Hacks"
] | [
"analog synthesizer",
"audio synth",
"eurorack",
"hurdy gurdy"
] | The Hurdy-Gurdy continues to worm its way into pole position as the hacker’s instrument. How else could you explain a medieval wheel fiddle being turned into a synthesizer? Move over, keytar — [Rory Scammell]’s
Balfolk Boombox is the real deal
.
It began life as MIDI-outputting SAMgurdy by [Sam Palmer], which we sadly ... | 2 | 2 | [
{
"comment_id": "8149175",
"author": "Physics_Dude",
"timestamp": "2025-07-14T04:44:33",
"content": "Good things come in threes :)",
"parent_id": null,
"depth": 1,
"replies": []
},
{
"comment_id": "8149373",
"author": "Floofy Catto",
"timestamp": "2025-07-14T16:56:46",
... | 1,760,371,486.100561 | ||
https://hackaday.com/2025/07/13/from-leash-to-locomotion-cara-the-robotic-dog/ | From Leash To Locomotion: CARA The Robotic Dog | Matt Varian | [
"Robots Hacks"
] | [
"capstan drive",
"inverse kinematics",
"robot dog",
"robotics"
] | Normally when you hear the words “rope” and “dog” in the same sentence, you think about a dog on a leash, but in this robot dog, the rope is what makes it move, not what stops it from going too far. [Aaed Musa]’s latest project is
CARA, a robotic dog
made mostly of 3D printed parts, with brushless motors and ropes used... | 9 | 3 | [
{
"comment_id": "8148961",
"author": "KIM TAE",
"timestamp": "2025-07-13T17:13:38",
"content": "Almost $2.5K on odrives alone. Computation, brushless motors, power regulation, and custom structural parts are cheap now but damn, the controllers to handle low level motor control are still such a hit i... | 1,760,371,486.146771 | ||
https://hackaday.com/2025/07/13/jcorp-nomad-esp32-s3-offline-media-server-in-a-thumbdrive/ | Jcorp Nomad: ESP32-S3 Offline Media Server In A Thumbdrive | John Elliot V | [
"hardware",
"Network Hacks"
] | [
"captive portal",
"ESP32-S3",
"media center",
"thumb drive"
] | [Jackson Studner] wrote in to let us know about his ESP32-based media server:
Jcorp Nomad
.
This project uses a ESP32-S3 to create a WiFi hotspot you can connect to from your devices. The hotspot is a captive portal which directs the user to a web-interface comprised of static HTML assets which are in situ with the var... | 27 | 11 | [
{
"comment_id": "8148827",
"author": "diddy",
"timestamp": "2025-07-13T11:20:21",
"content": "Dam, this is smalller than my Raspberry Pi Zero 2 W media server.https://hackaday.io/project/199227-pi-zero-2w-mini-dlna-server",
"parent_id": null,
"depth": 1,
"replies": []
},
{
"comm... | 1,760,371,486.429688 | ||
https://hackaday.com/2025/07/13/what-will-it-take-to-restore-a-serious-flight-simulator/ | What Will It Take To Restore A Serious Flight Simulator? | Donald Papp | [
"Repair Hacks",
"Transportation Hacks"
] | [
"flight simulator",
"rebuild"
] | [Jared] managed to find a professional FAA-certified flight simulator at an auction (a disassembled, partial one anyway) and wondered, what would it take to rebuild it into the coolest flight sim rig ever?
In a video, [Jared]
gives a tour of the system and highlights the potential
as well as pointing out challenges and... | 14 | 6 | [
{
"comment_id": "8148787",
"author": "shinsukke",
"timestamp": "2025-07-13T09:38:14",
"content": "My little cousin (he’s in highschool) is really into ETS (a truck sim game) and Microsoft Flight Simulator. He has been telling me to make him a sim rig for both games for 3+ years.I have all the skills... | 1,760,371,486.485912 | ||
https://hackaday.com/2025/07/12/an-open-concept-3d-printer-using-cantilever-arms/ | An Open-Concept 3D Printer Using Cantilever Arms | Aaron Beckendorf | [
"3d Printer hacks"
] | [
"3d printer",
"auto bed leveling",
"cantilever"
] | If you’re looking for a more open, unenclosed 3D printer design than a cubic frame can accommodate, but don’t want to use a bed-slinger, you don’t have many options. [Boothy Builds] recently found himself in this situation, so he
designed the Hi5
, a printer that holds its hotend between two cantilevered arms.
The hote... | 14 | 4 | [
{
"comment_id": "8148731",
"author": "Schobi",
"timestamp": "2025-07-13T06:46:23",
"content": "It is great that people try new designs still. Kudos for a nice build and optimization process.I agree, it looks less cluttered and light, but is it really? I’m not sure if anything is saved in parts or si... | 1,760,371,486.282321 | ||
https://hackaday.com/2025/07/12/die-cut-machine-makes-portable-metal-cuts/ | Die Cut Machine Makes Portable Metal Cuts | Al Williams | [
"classic hacks",
"Tool Hacks"
] | [
"die cut",
"sheet metal",
"soda can"
] | [Kevin Cheung] likes to upcycle old soda cans into — well — things. The metal is thin enough to cut by hand, but he’d started using a manual die-cutting machine, and it worked well. The problem? The machine was big and heavy, weighing well over 30 pounds. The solution was to get a lightweight die cutter. It worked bett... | 10 | 5 | [
{
"comment_id": "8148665",
"author": "BrightBlueJim",
"timestamp": "2025-07-13T02:16:39",
"content": "Flashback! When I was a small child, there were cheap cheap toys of many kinds, made from thin sheet metal. These came from Japan or Hong Kong. If you took them apart, you would see that they had... | 1,760,371,486.827186 | ||
https://hackaday.com/2025/07/12/playing-snake-with-digital-microfluidics/ | PlayingSnakeWith Digital Microfluidics | Adam Zeloof | [
"Games",
"hardware"
] | [
"droplet microfluidics",
"microfluidics",
"snake"
] | Display technology has come a long way since the advent of the CRT in the late 1800s (
yes, really!
). Since then, we’ve enjoyed the Nixie tubes, flip dots, gas plasma, LCD, LED, ePaper, the list goes on. Now, there’s a new kid on the block — water.
[Steve Mould] recently got his hands on an
OpenDrop
— an open-source d... | 2 | 2 | [
{
"comment_id": "8148598",
"author": "paulvdh",
"timestamp": "2025-07-12T23:20:09",
"content": "You can compare it with the older version from 2017 below to see how much progress they made in 8 years :)https://hackaday.com/2017/01/16/microfluidics-frogger-is-a-game-changer-for-diy-biology/(I.e. Yout... | 1,760,371,486.870318 | ||
https://hackaday.com/2025/07/12/2025-one-hertz-challenge-an-ancient-transistor-counts-the-seconds/ | 2025 One Hertz Challenge: An Ancient Transistor Counts The Seconds | Jenny List | [
"clock hacks",
"contests"
] | [
"1hz signal",
"2025 One Hertz Contest",
"germanium",
"phase shift oscillator"
] | If you’ve worked with germanium transistors, you’ll know that many of them have a disappointingly low maximum frequency of operation. This has more to do with some of the popular ones dating from the earliest years of the transistor age than it does to germanium being inherently a low frequency semiconductor, but it’s ... | 8 | 4 | [
{
"comment_id": "8148548",
"author": "Joshua",
"timestamp": "2025-07-12T20:12:58",
"content": "I would have used a little incandescent lamp instead of the white LED,because it’s prettier/warmer/smoother looking.Maybe via an switching transistor or an electro-mechanical relay, if needed to drive it."... | 1,760,371,486.781587 | ||
https://hackaday.com/2025/07/12/wire-like-a-pro-peeking-into-wire-harness-mastery/ | Wire Like A Pro: Peeking Into Wire Harness Mastery | Matt Varian | [
"how-to"
] | [
"cable harness",
"connectors",
"wire harness",
"wiring"
] | There are many ways to learn, but few to none of them compare to that of spending time standing over the shoulder of a master of the craft. This awesome page sent in by [JohnU] is a fantastic corner of the internet that lets us all peek over that shoulder to see someone who’s not only spent decades learning the art of ... | 26 | 9 | [
{
"comment_id": "8148521",
"author": "baltar",
"timestamp": "2025-07-12T17:37:51",
"content": "How does it apply to CAN signals? They degrade quite badly when used in non-compliant connectors.No offense but I’d rather my car not loose brakes just because of shoddy Temu connector.",
"parent_id": ... | 1,760,371,487.052973 | ||
https://hackaday.com/2025/07/12/trickle-down-when-doing-something-silly-actually-makes-sense/ | Trickle Down: When Doing Something Silly Actually Makes Sense | Elliot Williams | [
"3d Printer hacks",
"Hackaday Columns",
"Rants",
"Slider"
] | [
"3dbenchy",
"Benchy",
"newsletter",
"trickle"
] | One of the tropes of the space race back in the 1960s, which helped justify the spending for the part of the public who thought it wasn’t worth it, was that the technology developed for use in space would help us out here back on earth. The same goes for the astronomical expenses in Formula 1, or even on more pedestria... | 10 | 2 | [
{
"comment_id": "8148477",
"author": "CJay",
"timestamp": "2025-07-12T14:55:17",
"content": "Some high speed dot matrix printers would have more than one print head (the most I saw was 6) so the amount of movement to print a full row was minimised, I wonder if there’s scope for a multi head 3d print... | 1,760,371,487.699033 | ||
https://hackaday.com/2025/07/12/the-cantareel-is-hurdy-guitar-turned-inside-out/ | The Cantareel Is Hurdy-Guitar Turned Inside Out | Tyler August | [
"Musical Hacks"
] | [
"guitar",
"hurdy gurdy"
] | Sometimes, all you need to make something work is to come at it from a different angle from anyone else — flip the problem on its head, so to speak. That’s what [Keizo Ishibashi] did to create his
Cantareel, a modified guitar that actually sounds like a hurdy-gurdy
.
We wrote recently about a maker’s quest to create
ju... | 14 | 8 | [
{
"comment_id": "8148400",
"author": "Lightislight",
"timestamp": "2025-07-12T11:28:14",
"content": "Never thought I’d see the hurdy gurdy a topic of such fascination. This is awesome and even though the video sounds quality isn’t great you can tell they did what they set out to do. I love it.",
... | 1,760,371,486.921989 | ||
https://hackaday.com/2025/07/12/the-555-writ-large/ | The 555 Writ Large | Al Williams | [
"classic hacks",
"Parts"
] | [
"555",
"discrete transistors"
] | Few electronic ICs can claim to be as famous as the 555 timer. Maybe part of the reason is that the IC doesn’t have a specific function. It has a lot of building blocks that you can use to create timers and many other kinds of circuits. Now [Stoppi] has decided to make
a 555 out of discrete components
. The resulting I... | 25 | 10 | [
{
"comment_id": "8148344",
"author": "Andrew",
"timestamp": "2025-07-12T09:24:58",
"content": "All those transistors? Could have used a ‘555!",
"parent_id": null,
"depth": 1,
"replies": [
{
"comment_id": "8148385",
"author": "Chris",
"timestamp": "2025-07-12... | 1,760,371,486.986964 | ||
https://hackaday.com/2025/07/11/get-roped-into-magnetic-core-memory-with-this-512-bit-module/ | Get Roped Into Magnetic Core Memory With This 512 Bit Module | Tyler August | [
"Retrocomputing"
] | [
"core memory",
"Magnetic-core memory"
] | Magnetic Core memory was the RAM at the heart of many computer systems through the 1970s, and is undergoing something of a resurgence today since it is easiest form of memory for an enterprising hacker to DIY. [Han] has an
excellent writeup that goes deep in the best-practices
of how to wire up core memory, that pairs ... | 19 | 8 | [
{
"comment_id": "8148319",
"author": "IanS",
"timestamp": "2025-07-12T07:46:01",
"content": "[Curious Marc] has an excellent YouTube video detailing the waveform requirements.https://youtu.be/AwsInQLmjXc",
"parent_id": null,
"depth": 1,
"replies": []
},
{
"comment_id": "8148376",... | 1,760,371,487.109206 | ||
https://hackaday.com/2025/07/11/measuring-the-impact-of-llms-on-experienced-developer-productivity/ | Measuring The Impact Of LLMs On Experienced Developer Productivity | Maya Posch | [
"Artificial Intelligence",
"Software Development"
] | [
"artificial intelligence",
"large language models"
] | Recently AI risk and benefit evaluation company METR ran a randomized control test (RCT) on a gaggle of experienced open source developers to gain objective data on how the use of LLMs affects their productivity. Their findings were that using LLM-based tools like Cursor Pro with Claude 3.5/3.7 Sonnet
reduced productiv... | 74 | 19 | [
{
"comment_id": "8148272",
"author": "TG",
"timestamp": "2025-07-12T02:09:55",
"content": "Sounds very similar to research on productivity through adderall. Everyone thinks they are enhancing performance, and indeed they are furiously doing something, but it’s tweaker brain. You’re cleaning your bat... | 1,760,371,487.28328 | ||
https://hackaday.com/2025/07/11/diy-x-rays-made-easy/ | DIY X-Rays Made Easy | Al Williams | [
"Science"
] | [
"x-ray"
] | Who doesn’t want an X-ray machine? But you need a special tube and super high voltage, right? [Project 326] says no, and produces
a USB-powered device
that uses a tube you can pick up two for a dollar. You might guess the machine doesn’t generate X-rays with a lot of energy, and you’d be right. But you can make up for ... | 32 | 10 | [
{
"comment_id": "8148181",
"author": "TG",
"timestamp": "2025-07-11T23:06:35",
"content": "Rustin Cohle wearing a surgeon’s hat and dragging on a ciggy definitely inspires confidence in this endeavor, good choice.Driving the anode voltage out of USBC for extended periods is worth looking into by its... | 1,760,371,487.174519 | ||
https://hackaday.com/2025/07/11/designing-a-cpu-with-only-memory-chips/ | Designing A CPU With Only Memory Chips | Aaron Beckendorf | [
"Retrocomputing"
] | [
"8-bit computers",
"8-bit CPU",
"cpu",
"cpu design",
"eeprom",
"eprom"
] | Building a simple 8-bit computer is a great way to understand computing fundamentals, but there’s only so much you can learn by building a system around an existing processor. If you want to learn more, you’ll have to go further and build the CPU yourself, as [MINT] demonstrated with his
EPROMINT project
(video in Poli... | 14 | 7 | [
{
"comment_id": "8148116",
"author": "BrightBlueJim",
"timestamp": "2025-07-11T20:13:55",
"content": "Back in the 90s, I was doing hardware design that involved FPGAs, and while I haven’t really kept up with the technology, back then there were manufacturers that were implementing FPGAs as arrays of... | 1,760,371,487.37126 | ||
https://hackaday.com/2025/07/11/an-induction-lamp-made-on-the-same-principle-as-ordinary-fluorescent-lamp/ | An Induction Lamp Made On The Same Principle As Ordinary Fluorescent Lamp | John Elliot V | [
"hardware"
] | [
"fluorescent lamp",
"induction lamp",
"lighting"
] | Over on YouTube, [Technology Connections] has a new video:
Induction lamps: fluorescent lighting’s final form
.
This video is about a wireless fluorescent light which uses induction to transfer power from the electrical system into the lamp. As this lamp doesn’t require wiring it is not prone to “sputtering” as typical... | 23 | 10 | [
{
"comment_id": "8148084",
"author": "Dude",
"timestamp": "2025-07-11T19:01:53",
"content": "200 W and light output of 16,000 lumensWhich is also at the upper end of the practical luminous efficacy of most consumer LED lamps. 80 lm/W.A 60 Watt equivalent LED bulb does 600-800 lumens with 9-10 Watts.... | 1,760,371,487.656029 | ||
https://hackaday.com/2025/07/11/dearest-c-let-me-count-the-ways-i-love-hate-thee/ | Dearest C++, Let Me Count The Ways I Love/Hate Thee | Maya Posch | [
"Featured",
"Rants",
"Slider",
"Software Development"
] | [
"c++"
] | My first encounter with C++ was way back in the 1990s, when it was one of the Real Programming Languages™ that I sometimes heard about as I was still splashing about in the kiddie pool with Visual Basic, PHP and JavaScript. The first formally standardized version of C++ is the ISO 1998 standard, but it had been making ... | 59 | 24 | [
{
"comment_id": "8148054",
"author": "Jouni",
"timestamp": "2025-07-11T17:17:47",
"content": "It is as complex as you write it. You can write spaghetti with any language.You don’t need to use all the features. (Spoiler alert: code “fancyness” won’t actually make your software any better)",
"pare... | 1,760,371,487.491319 | ||
https://hackaday.com/2025/07/11/hackaday-podcast-episode-328-benchies-beanies-and-back-to-the-future/ | Hackaday Podcast Episode 328: Benchies, Beanies, AndBack To The Future | Kristina Panos | [
"Hackaday Columns",
"Podcasts"
] | [
"Hackaday Podcast"
] | This week, Hackaday’s Elliot Williams and Kristina Panos joined forces to bring you the latest news, mystery sound, and of course, a big bunch of hacks from the previous week.
In Hackaday news,
the One Hertz Challenge
ticks on. You have until Tuesday, August 19th to show us what you’ve got, so head over to Hackaday.IO ... | 2 | 1 | [
{
"comment_id": "8148097",
"author": "Dude",
"timestamp": "2025-07-11T19:33:19",
"content": "New math was about using math education as an excuse for indoctrinating a way of thinking. There’s a book, “Why Johnny Can’t Add: The Failure of the New Math” (Morris Kline, 1973)It was trying to teach inde... | 1,760,371,487.746686 | ||
https://hackaday.com/2025/07/11/playstation-case-mod-hides-gamer-shame/ | PlayStation Case Mod Hides Gamer Shame | Tyler August | [
"home hacks",
"Playstation Hacks"
] | [
"case modding",
"noctua",
"PlayStation 5"
] | [Zac] of
Zac Builds
has a shameful secret: he, a fully grown man, plays video games. Shocking, we know, but such people do exist in our society. After being rightfully laughed out of the family living room, [Zac] relocated his indecent activities to his office, but he knew that was not enough. Someone might enter, migh... | 9 | 3 | [
{
"comment_id": "8148038",
"author": "Greg A",
"timestamp": "2025-07-11T16:36:44",
"content": "wow, spinning media for game carts??i learned a long time ago the secret to optical drive longevity is to make sure it doesn’t have the case’s cooling fan flowing through it, collecting dust on the parts. ... | 1,760,371,487.790101 | ||
https://hackaday.com/2025/07/11/this-week-in-security-bitchat-citrixbleed-part-2-opossum-and-tsas/ | This Week In Security: Bitchat, CitrixBleed Part 2, Opossum, And TSAs | Jonathan Bennett | [
"Hackaday Columns",
"Security Hacks"
] | [
"Bitchat",
"Citrixbleed",
"mcp",
"Opossum",
"This Week in Security"
] | @jack is back with a weekend project
. Yes, that Jack. [Jack Dorsey] spent last weekend learning about Bluetooth meshing, and built Bitchat, a BLE mesh encrypted messaging application. It uses X25519 for key exchange, and AES-GCM for message encryption.
[Alex Radocea] took a look at the current state of the project
, s... | 10 | 5 | [
{
"comment_id": "8147996",
"author": "CJay",
"timestamp": "2025-07-11T14:15:38",
"content": "Such an unfortunate name, Bitch at and it’s only going to work where there’s a significant number of users in close proximity, plus, anyone else remember Cybiko?",
"parent_id": null,
"depth": 1,
... | 1,760,371,487.83964 | ||
https://hackaday.com/2025/07/11/this-homebrew-cpu-got-its-start-in-the-1990s/ | This Homebrew CPU Got Its Start In The 1990s | John Elliot V | [
"computer hacks",
"hardware"
] | [
"1-bit ALU",
"74181",
"homebrew cpu"
] | [Sylvain Fortin] recently wrote in to tell us about his
Homebrew CPU Project
, and the story behind this one is truly remarkable.
He began working on this toy CPU back in 1994, over thirty years ago. After learning about the
74LS181 ALU
in college he decided to build his own CPU. He made considerable progress back in t... | 4 | 4 | [
{
"comment_id": "8147949",
"author": "Tom",
"timestamp": "2025-07-11T11:13:39",
"content": "I just love seeing big wire wrapped boards :-)",
"parent_id": null,
"depth": 1,
"replies": []
},
{
"comment_id": "8147964",
"author": "paulvdh",
"timestamp": "2025-07-11T11:53:19",... | 1,760,371,487.892849 | ||
https://hackaday.com/2025/07/10/long-live-rss/ | Long Live RSS! | Navarre Bartz | [
"Art",
"computer hacks"
] | [
"art",
"comic",
"enshittification",
"monopoly",
"rss"
] | While we know that many of you are reading Hackaday via our Really Simple Syndication (RSS) feed, we suspect that most people on the street wouldn’t know that it underlies a lot of the modern internet. [A. McNamee] and [A. Service] have created an illustrated history of RSS that proudly proclaims
RSS is (not) dead (yet... | 34 | 24 | [
{
"comment_id": "8147582",
"author": "Feinfinger (there is no 3rd cheek!)",
"timestamp": "2025-07-10T15:48:03",
"content": "RSS/Atom->NNTP bridges are extremely nice!",
"parent_id": null,
"depth": 1,
"replies": []
},
{
"comment_id": "8147591",
"author": "Uwe",
"timestamp"... | 1,760,371,487.975059 | ||
https://hackaday.com/2025/07/10/ask-hackaday-are-you-wearing-3d-printed-shoes/ | Ask Hackaday: Are You Wearing 3D Printed Shoes? | Al Williams | [
"3d Printer hacks",
"Ask Hackaday",
"Hackaday Columns",
"Slider"
] | [
"3d printed shoes",
"3d printing",
"shoe"
] | We love 3D printing. We’ll print brackets, brackets for brackets, and brackets to hold other brackets in place. Perhaps even a guilty-pleasure Benchy. But 3D printed shoes? That’s where we start to have questions.
Every few months, someone announces a new line of 3D-printed footwear. Do you really want your next pair o... | 50 | 14 | [
{
"comment_id": "8147557",
"author": "Greg A",
"timestamp": "2025-07-10T14:20:22",
"content": "the obvious practical thing is 3d-printed insoles. that’s typically how shoes are customized to your feet, just replacing the insole.mostfeet will fit fine within a standard outer sole and upper.a podiatr... | 1,760,371,488.064871 | ||
https://hackaday.com/2025/07/10/an-emulated-stroll-down-macintosh-memory-lane/ | An Emulated Stroll Down Macintosh Memory Lane | Tyler August | [
"Retrocomputing"
] | [
"computer history",
"macintosh classic",
"macosx",
"os8",
"os9",
"retrocomputing",
"system 7",
"UI design"
] | If you’re into Macs, you’ll always remember your first. Maybe it was the revolutionary classic of 1984 fame, perhaps it was the adorable G3 iMac in 1998, or even a shiny OS X machine in the 21st century. Whichever it is, you’ll find it emulated in [Marcin Wichary]’s essay “
Frame of preference: A history of Mac setting... | 6 | 3 | [
{
"comment_id": "8147542",
"author": "ZTH",
"timestamp": "2025-07-10T13:23:21",
"content": "…Curputino’s…",
"parent_id": null,
"depth": 1,
"replies": [
{
"comment_id": "8147548",
"author": "ono",
"timestamp": "2025-07-10T13:34:12",
"content": "critiq... | 1,760,371,488.111819 | ||
https://hackaday.com/2025/07/10/generatively-designed-aerospike-test-fired/ | Generatively-Designed Aerospike Test Fired | Navarre Bartz | [
"Transportation Hacks"
] | [
"3d printed rocket engine",
"aerospike",
"generative design",
"genetic algorithm",
"hybrid rocket",
"rocket",
"rocketry"
] | The aerospike engine holds great promise for spaceflight, but for various reasons, has remained slightly out of reach for decades. But thanks to Leap 71, the technology has moved one step closer to a spacecraft near you with the test fire of their
generatively-designed, 3D printed aerospike
.
We reported on the
origina... | 28 | 7 | [
{
"comment_id": "8147505",
"author": "Josiah",
"timestamp": "2025-07-10T11:06:13",
"content": "please include the weight differential of the engines, not just hteir thrust differential. How can we judge them otherwise?",
"parent_id": null,
"depth": 1,
"replies": [
{
"commen... | 1,760,371,488.177339 | ||
https://hackaday.com/2025/07/09/solder-smarts-hands-free-fume-extractor-hack/ | Solder Smarts: Hands-Free Fume Extractor Hack | Matt Varian | [
"Microcontrollers",
"Tool Hacks"
] | [
"esphome",
"fume extractor",
"home assisstant",
"wemos d1 mini"
] | [Ryan] purchased a large fume extractor designed to sit on the floor below the work area and pull solder fumes down into its filtering elements. The only drawback to this new filter was that its controls were located near his feet. Rather than kicking at his new equipment,
he devised a way to automate it
.
By adding a ... | 8 | 5 | [
{
"comment_id": "8147454",
"author": "Jan",
"timestamp": "2025-07-10T08:08:11",
"content": "Why is there hot-snot on the power connector and the connector to the motor? Don’t these kind of connectors already have some form of locking of themselves?",
"parent_id": null,
"depth": 1,
"repli... | 1,760,371,488.243452 | ||
https://hackaday.com/2025/07/09/volume-controller-rejects-skeumorphism-embraces-the-physical/ | Volume Controller Rejects Skeumorphism, Embraces The Physical | Tyler August | [
"digital audio hacks",
"Peripherals Hacks"
] | [
"3d printed",
"digital audio",
"esp32s3",
"fader"
] | The volume slider on our virtual desktops is a skeuomorphic callback to the volume sliders on professional audio equipment on actual, physical desktops. [Maker Vibe] decided that this skeuomorphism was so last century, and made himself a
physical audio control box for his PC.
Since he has three audio outputs he needs t... | 34 | 11 | [
{
"comment_id": "8147379",
"author": "Paul",
"timestamp": "2025-07-10T03:39:54",
"content": "So many layers of complexity, to mimic a simple potentiometer.But if you got 4 gigaflops to burn, why not?Now if they can only solve the latency problem…",
"parent_id": null,
"depth": 1,
"replies... | 1,760,371,488.332326 | ||
https://hackaday.com/2025/07/09/how-to-train-a-new-voice-for-piper-with-only-a-single-phrase/ | How To Train A New Voice For Piper With Only A Single Phrase | Dave Rowntree | [
"Artificial Intelligence"
] | [
"Chatterbox",
"gpu",
"PiperVoice",
"pytorch",
"speech synthesis",
"text to speech",
"whisper"
] | [Cal Bryant] hacked together a home automation system years ago, which more recently utilizes Piper TTS (text-to-speech) voices for various undisclosed purposes. Not satisfied with the robotic-sounding standard voices available, [Cal] set about an experiment to
fine-tune the Piper TTS AI voice model using a clone of a ... | 7 | 3 | [
{
"comment_id": "8147347",
"author": "Jon H",
"timestamp": "2025-07-09T23:59:15",
"content": "What happens if you train one voice with input of two very different voices?For example 650 phrases by “Boris Karloff” and 650 phrases by “Shirley Temple”.",
"parent_id": null,
"depth": 1,
"repl... | 1,760,371,488.383256 | ||
https://hackaday.com/2025/07/11/listen-to-the-sound-of-the-crystals/ | Listen To The Sound Of The Crystals | Jenny List | [
"clock hacks"
] | [
"32.768 kHz",
"crystal",
"frequency"
] | We’re all used to crystal resonators — they provide pretty accurate frequency references for oscillators with low enough drift for most of our purposes. As the quartz equivalent of a tuning fork, they work by vibrating at their physical resonant frequency, which means that just like a tuning fork, it should be possible... | 33 | 6 | [
{
"comment_id": "8147887",
"author": "ludek111",
"timestamp": "2025-07-11T08:34:53",
"content": "Looks like Casio F-91W – this watch fits for Man and Woman, and I think every hacker/maker should have one! It is a good starter at least. There are even mods for this watch. I had one and switched to Ca... | 1,760,371,488.454047 | ||
https://hackaday.com/2025/07/10/diy-navigation-system-floats-this-boat/ | DIY Navigation System Floats This Boat | Seth Mabbott | [
"Transportation Hacks"
] | [
"boat",
"navdesk",
"navigation",
"upcycle"
] | [Tom] has taken a DIY approach to smart sailing with a Raspberry Pi as the back end to the
navigation desk on his catamaran
, the SeaHorse. Tucked away neatly in a waterproof box with a silicone gasket, he keeps the single board computer safe from circuit-destroying salt water. Keeping a board sealed up so tightly also... | 10 | 7 | [
{
"comment_id": "8147909",
"author": "Tom",
"timestamp": "2025-07-11T09:20:02",
"content": "Hi this is Tom from this video.Thanks hackday for highlighting my raspberry pi powered sailboat project.I am going to be posting regular updates on my Youtube channel “Sailing Seahorse” please subscribe which... | 1,760,371,488.500753 | ||
https://hackaday.com/2025/07/10/double-your-printing-fun-with-dual-light-3d-printing/ | Double Your Printing Fun With Dual-Light 3D Printing | Al Williams | [
"3d Printer hacks"
] | [
"3d printing",
"resin",
"resin 3d printer"
] | Using light to 3D print liquid resins is hardly a new idea. But researchers at the University of Texas at Austin want to double down on the idea. Specifically, they use a resin with different physical properties when
cured using different wavelengths of light
.
Natural constructions like bone and cartilage inspired the... | 9 | 4 | [
{
"comment_id": "8147797",
"author": "SpillsDirt",
"timestamp": "2025-07-11T03:33:41",
"content": "Not familiar with the exact chemistry of this project but a few years back I read a paper detailing work with a dual wavelength system in which two different photoinitiators were used. Their chemistry ... | 1,760,371,488.77905 | ||
https://hackaday.com/2025/07/10/hacking-a-guitar-into-a-hurdy-gurdy-hybrid-with-3d-prints/ | Hacking A Guitar Into A Hurdy-Gurdy Hybrid With 3D Prints | Tyler August | [
"3d Printer hacks",
"Musical Hacks"
] | [
"3d print",
"3d printed musical instruments",
"guitar",
"hurdy gurdy",
"HurdyGurdy"
] | If you’re looking for a long journey into the wonderful world of instrument hacking, [Arty Farty Guitars] is six parts into a seven part series on
hacking an existing guitar into a guitar-hurdy-gurdy-hybrid,
and it is “a trip” as the youths once said. The first video is embedded below.
The Hurdy-Gurdy is a wheeled inst... | 10 | 5 | [
{
"comment_id": "8147752",
"author": "smellsofbikes",
"timestamp": "2025-07-10T23:18:38",
"content": "Yeah, string to wheel alignment is pretty much the determining factor in how a hurdygurdy sounds. A fretboard that has frets that pop out to touch the string might work, but then really you’re back... | 1,760,371,488.637158 | ||
https://hackaday.com/2025/07/10/embedded-usb-debug-for-snapdragon/ | Embedded USB Debug For Snapdragon | Al Williams | [
"Linux Hacks",
"Software Development",
"Software Hacks"
] | [
"debugging",
"qualcomm",
"Snapdragon",
"SWD"
] | According to [Casey Connolly], Qualcomm’s release of how to interact with their
embedded USB debugging
(EUD) is a big deal. If you haven’t heard of it, nearly all Qualcomm SoCs made since 2018 have a built-in debugger that connects to the onboard USB port. The details vary by chip, but you write to some registers and s... | 5 | 3 | [
{
"comment_id": "8147729",
"author": "Greg A",
"timestamp": "2025-07-10T21:28:05",
"content": "i do not love the paragraph in here that does indeed provide the pull requesti, but nonetheless made me suspect “area man struggles with ‘make’ for a couple hours” was the point of the articlebut what’s th... | 1,760,371,489.290331 | ||
https://hackaday.com/2025/07/10/voltage-divider-filter-its-both/ | Voltage Divider? Filter? It’s Both! | Al Williams | [
"Parts"
] | [
"RC filter",
"thevenin equivalent",
"voltage divider"
] | When we do textbook analysis, we tend to ignore the real-world concerns for the sake of learning. So, a typical theoretical voltage divider is simply two resistors. But if you examine a low-pass RC filter, you’ll see a single resistor and a capacitor. What if you
combine them
? That’s what [Old Hack EE] did in a recent... | 3 | 3 | [
{
"comment_id": "8147732",
"author": "Dude",
"timestamp": "2025-07-10T21:40:40",
"content": "It helps if you are familiar with Thevenin equivalentsThevenin and Norton equivalents would of course be included in the basic textbook analysis if you read the textbook a little further. The challenge here ... | 1,760,371,488.817685 | ||
https://hackaday.com/2025/07/10/personal-reflections-on-immutable-linux/ | Personal Reflections On Immutable Linux | Tyler August | [
"Featured",
"Interest",
"Linux Hacks",
"Slider"
] | [
"daily driver",
"Immutable",
"linux",
"operating system"
] | Immutable distributions are slowly spreading across the Linux world– but should you care? Are they hacker friendly? What does “immutable” mean, anyway?
Immutable means “not subject or susceptible to change” according to Merriam-Webster, which is not 100% accurate in this context, but it’s close enough and the name is t... | 51 | 29 | [
{
"comment_id": "8147622",
"author": "macsimki",
"timestamp": "2025-07-10T17:31:23",
"content": "you can pry [insert os/app/distribution here] from my cold dead hands!",
"parent_id": null,
"depth": 1,
"replies": [
{
"comment_id": "8147631",
"author": "Tyler August",... | 1,760,371,489.12768 | ||
https://hackaday.com/2025/07/09/no-tension-for-tensors/ | No Tension For Tensors? | Al Williams | [
"Science"
] | [
"math",
"tensor",
"tensors"
] | We always enjoy [FloatHeadPhysics] explaining any math or physics topic. We don’t know if he’s acting or not, but he seems genuinely excited about every topic he covers, and it is infectious. He also has entertaining imaginary conversations with people like Feynman and Einstein. His recent video on
tensors
begins by sh... | 11 | 5 | [
{
"comment_id": "8147309",
"author": "Albert",
"timestamp": "2025-07-09T20:41:05",
"content": "Wasn’t youtube supposed to demonetize AI-generated content? Dave mentioned it on EEVblog few days ago.",
"parent_id": null,
"depth": 1,
"replies": [
{
"comment_id": "8147340",
... | 1,760,371,488.864928 | ||
https://hackaday.com/2025/07/09/floss-weekly-episode-840-end-of-10-not-just-some-guy-in-a-van/ | FLOSS Weekly Episode 840: End-of-10; Not Just Some Guy In A Van | Jonathan Bennett | [
"Hackaday Columns",
"Podcasts"
] | [
"FLOSS Weekly",
"kde",
"linux",
"Windows 10"
] | This week
Jonathan
chats with
Joseph P. De Veaugh-Geiss
about KDE’s eco initiative and the End of 10 campaign! Is Open Source really a win for environmentalism? How does the End of 10 campaign tie in? And what does Pewdiepie have to do with it? Watch to find out!
* End Of 10 campaign:
https://endof10.org/
* KDE Eco pro... | 0 | 0 | [] | 1,760,371,488.907508 | ||
https://hackaday.com/2025/07/09/dithering-with-quantization-to-smooth-things-over/ | Dithering With Quantization To Smooth Things Over | Maya Posch | [
"Hackaday Columns",
"Science",
"Slider",
"Software Development"
] | [
"dithering",
"halftone"
] | It should probably come as no surprise to anyone that the images which we look at every day – whether printed or on a display – are simply illusions. That cat picture isn’t actually a cat, but rather a collection of dots that when looked at from far enough away tricks our brain into thinking that we are indeed looking ... | 19 | 14 | [
{
"comment_id": "8147274",
"author": "Physics Dude",
"timestamp": "2025-07-09T18:41:52",
"content": "I wrote a simple browser-based dithering and pallet conversion tool in JS a while back that references a lot of the linked articles. Linked in name.",
"parent_id": null,
"depth": 1,
"repl... | 1,760,371,488.973015 | ||
https://hackaday.com/2025/07/09/kids-vs-computers-chisanbop-remembered/ | Kids Vs Computers: Chisanbop Remembered | Al Williams | [
"classic hacks"
] | [
"chisanbop",
"math"
] | If you are a certain age, you probably remember the ads and publicity around Chisanbop — the supposed ancient art of Korean finger math. Was it Korean? Sort of. Was it faster than a calculator? Sort of. [Chris Staecker] offers a great look at
Chisanbop
, not just how to do it, but also how it became such a significant ... | 14 | 6 | [
{
"comment_id": "8147232",
"author": "Lee Gleason",
"timestamp": "2025-07-09T15:43:49",
"content": "This reminds me of an article by SF writer Frederik Pohl, “How To Count On Your Fingers”, where he explains how to deal with numbers from 0 to 1023, using your ten fingers as binary digits.",
"par... | 1,760,371,489.035359 | ||
https://hackaday.com/2025/07/09/crunching-the-news-for-fun-and-little-profit/ | Crunching The News For Fun And Little Profit | Jenny List | [
"Featured",
"Interest",
"News",
"Original Art",
"Slider"
] | [
"computer science",
"literature",
"news"
] | Do you ever look at the news, and wonder about the process behind the news cycle? I did, and for the last couple of decades it’s been the subject of one of my projects. The Raspberry Pi on my shelf runs
my word trend analysis tool for news content
, and since my journey from curious geek to having my own large corpus a... | 8 | 6 | [
{
"comment_id": "8147226",
"author": "sébastien audibert",
"timestamp": "2025-07-09T15:03:31",
"content": "I just love your story : i just happened discovering computational linguistics and getting a glimpse of how powerful it could get when properly used.Thx a million for this sophisticated yet con... | 1,760,371,489.177193 | ||
https://hackaday.com/2025/07/09/pic-burnout-dumping-protected-otp-memory-in-microchip-pic-mcus/ | PIC Burnout: Dumping Protected OTP Memory In Microchip PIC MCUs | Maya Posch | [
"Microcontrollers",
"Reverse Engineering"
] | [
"Microchip PIC",
"pic16"
] | Normally you can’t read out the One Time Programming (OTP) memory in Microchip’s PIC MCUs that have code protection enabled, but an exploit has been found that gets around the copy protection in a range of PIC12, PIC14 and PIC16 MCUs.
This exploit is called
PIC Burnout
, and was developed by [Prehistoricman], with the ... | 9 | 4 | [
{
"comment_id": "8147193",
"author": "lowtolerance",
"timestamp": "2025-07-09T12:18:27",
"content": "The OG Xbox scene is the gift that keeps on giving",
"parent_id": null,
"depth": 1,
"replies": []
},
{
"comment_id": "8147291",
"author": "J. Peterson",
"timestamp": "2025... | 1,760,371,489.219519 | ||
https://hackaday.com/2025/07/09/programming-like-its-1986-for-fun-and-zero-profit/ | Programming Like It’s 1986, For Fun And Zero Profit | Tyler August | [
"Retrocomputing",
"Software Development"
] | [
"c programming",
"conways game of life",
"macintosh plus",
"retro"
] | Some people slander retrocomputing as an old man’s game, just because most of those involved are more ancient than the hardware they’re playing with. But there are veritable children involved too — take the [ComputerSmith], who is
recreating Conway’s game of life on a Macintosh Plus
that could very well be as old as hi... | 27 | 10 | [
{
"comment_id": "8147143",
"author": "pearlstone123022",
"timestamp": "2025-07-09T08:10:13",
"content": "Recreating Conway’s Game of Life on a Macintosh Plus is both nostalgic and intellectually bold, brilliant way to sharpen C skills with real constraints. Really amazing.",
"parent_id": null,
... | 1,760,371,489.360755 | ||
https://hackaday.com/2025/07/08/five-minuteish-beanie-is-the-fastest-weve-seen-yet/ | Five-minute(ish) Beanie Is The Fastest We’ve Seen Yet | Tyler August | [
"Wearable Hacks"
] | [
"fiber arts",
"knitting",
"knitting machine"
] | Yes, you read that right– not benchy, but beanie, as in the hat. A toque, for those of us under the Maple Leaf. It’s not 3D printed, either, except perhaps by the loosest definition of the word: it is knit, by [Kevr102]’s
motorized turbo knitter.
The turbo-knitter started life as an Addi Express King knitting machine. ... | 15 | 8 | [
{
"comment_id": "8147121",
"author": "Jan",
"timestamp": "2025-07-09T06:52:16",
"content": "Never expected that knitting items to keep you warm could be so cool. Fun project!I really wonder how the machine sounds.",
"parent_id": null,
"depth": 1,
"replies": [
{
"comment_id"... | 1,760,371,489.412884 | ||
https://hackaday.com/2025/07/08/oscillator-negativity-is-a-good-thing/ | Oscillator Negativity Is A Good Thing | Al Williams | [
"classic hacks",
"Parts"
] | [
"negative resistance",
"oscillator"
] | Many people who get analog electronics still struggle a bit to design oscillators. Even common simulators often need a trick to simulate some oscillating circuits. The Barkhausen criteria state that for stable oscillation, the loop gain must be one, and the phase shift around the feedback loop must be a multiple of 360... | 5 | 3 | [
{
"comment_id": "8147264",
"author": "AZdave",
"timestamp": "2025-07-09T18:10:17",
"content": "Oscillators are easier to make when you’re not trying to make one.",
"parent_id": null,
"depth": 1,
"replies": [
{
"comment_id": "8147265",
"author": "Akimmet",
"t... | 1,760,371,489.472038 | ||
https://hackaday.com/2025/07/08/view-a-beehive-up-close-with-this-3d-printed-hive/ | View A Beehive Up Close With This 3D Printed Hive | Ian Bos | [
"green hacks"
] | [
"3D printable",
"beehive",
"Bio hacking",
"honey"
] | Bees are incredible insects that live and die for their hive, producing rich honey in complicated hive structures. The problem is as the average beekeeper, you wouldn’t see much of these intricate structures without disturbing the hive. So why not 3D print an observation hive? With [Teddy Hatcher]’s 3D printing creativ... | 24 | 9 | [
{
"comment_id": "8147023",
"author": "Anonymous",
"timestamp": "2025-07-08T23:13:51",
"content": "On one hand this would be awesome, look really cool and the Flow Hive would make it easy to harvest some of the honey without ever opening things up.On the other hand, I do worry about the long term hea... | 1,760,371,489.656049 | ||
https://hackaday.com/2025/07/08/better-solid-state-heat-pumps-through-science/ | Better Solid State Heat Pumps Through Science | Al Williams | [
"Science"
] | [
"Heat pump",
"peltier module",
"thermoelectric cooler"
] | If you need to cool something, the gold standard is using a gas compressor arrangement. Of course, there are definite downsides to that, like weight, power consumption, and vibrations. There are solid-state heat pumps — the kind you see in portable coolers, for example. But, they are not terribly efficient and have lim... | 22 | 7 | [
{
"comment_id": "8146976",
"author": "Ostracus",
"timestamp": "2025-07-08T20:25:30",
"content": "And below that:Self-oscillating polymeric refrigerator with high energy efficiencyArticle 08 May 2024",
"parent_id": null,
"depth": 1,
"replies": []
},
{
"comment_id": "8146990",
... | 1,760,371,489.720156 |
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