dialog listlengths 4 30 | title stringlengths 15 150 | category stringclasses 14 values | dialog_time stringdate 2016-01-21 01:59:30 2018-07-01 01:34:46 |
|---|---|---|---|
[
{
"message": "Is this dangerous? We purchased a new washer (house is around 17 years old) and when the water clearly cuts off suddenly (it's one of those fill then check then fill washers) it makes a loud noise.Is this something to be concerned about long term? Surely this isn't an uncommon problem?",
"role... | Washer causing pipes banging, is this dangerous? | diy | 2018-04-21T01:06:45.843 |
[
{
"message": "Every season paper and / or mud wasps like to build nests in my eaves. I have no compunction with spraying them with raid when I see them but I'd like to prevent the nesting from the start if I can.I don't mind using chemicals.I don't mind wasps on the property in general but I specifically don't ... | How can I prevent wasps from nesting in my eaves? | diy | 2018-04-21T23:05:09.527 |
[
{
"message": "My fence line sits on a slab of concrete that separates my house from the neighbor's house. So far, I was able to complete two posts via extracting the post rot and replacing the post in the 4x4 slots in the concrete slab.However there is one slot that is very slanted.<a href=\"https://i.stack.img... | What are my options for replacing a rotted fence post that is slanted in a large concrete slab? | diy | 2018-04-22T22:04:11.977 |
[
{
"message": "I have a switch box with 3 switches in it, each powering a different light. All three switches are supplied by pigtails from one incoming cable.Two switches are simple single pole switches and when the breaker is turned off those lights stop working.The third is a 3-way switch and when the breake... | Three Way Switch Works With Power Off | diy | 2018-04-23T23:30:42.513 |
[
{
"message": "I'm adding a utility sink to our garage. The water heater is a few feet away, so the cold supply line comes out of the adjacent crawl space, heads up the wall to the heater, the hot water leaves and heads back to the crawl space.Is there any reason I can't use these lines to supply the utility sin... | Can I branch from a water heater's supply and output lines for a utility sink? | diy | 2018-04-25T13:24:11.603 |
[
{
"message": "There is tons of information on \"bonded neutral\" and \"floating neutral\" generator wiring to transfer switch. However, I have one question I cannot find the answer. I recently bought a Reliance Control Transfer Switch TF151W (2-pole transfer switch) for the furnace, because I cannot use an exte... | Electrical question on floating neutral generator for emergency use | diy | 2018-04-26T19:43:05.573 |
[
{
"message": "I'm installing <a href=\"https://coretecfloors.com/plymouth-oak-vv022-00807/\" rel=\"nofollow noreferrer\">CoreTec One vinyl plank flooring as a floating floor over slab in a three-season porch. I don't think my situation is as bad as that described in <a href=\"https://diy.stackexchange.com/ques... | How smooth does the floor need to be to lay vinyl plank over it? | diy | 2018-04-28T14:30:09.523 |
[
{
"message": "We'd like to hang a <a href=\"http://www.coolaroousa.com/shade-sails\" rel=\"nofollow noreferrer\">Coolaroo shade-sail over our elevated deck, but are uncertain, how to best attach it.Deck is adjacent to the house's second floor, but the walls have no hooks and are covered with Hardieplank siding.... | How to hang a "Coolaroo" shade-sail? | diy | 2018-05-07T01:34:41.947 |
[
{
"message": "House built in 1997 a receptacle in the kitchen that the coffee brewer has always been plugged into suddenly stopped working. I checked the gfi's in that room none of them tripped, checked the other receptacles and they all work. This one receptacle is the only one not working. I took the old rece... | receptacle not working in kitchen | diy | 2018-05-08T01:23:51.473 |
[
{
"message": "I replaced the bearings in my Vitamix blender and I’m curious as to why there is a wave washer and a plain washer with a smaller diameter in between the two sealed ball bearings.My guess is that the wave washer will prevent chattering between the two bearings and the plain washer provides support ... | Why is there a wave spring washer and a plain washer between these two sealed bearings? | diy | 2018-05-09T15:44:10.353 |
[
{
"message": "I am installing a 60 AMP subpanel in a detached pole garage 150 feet from the house. Garage subpanel will be supplied from an existing 100 AMP subpanel in the basement of the house (running from the 200 AMP main is not an option).What size of wire and type of wire is required? Can it be direct bu... | What type of wire and load center for subpanel in detached pole garage? | diy | 2018-05-09T16:20:35.697 |
[
{
"message": "Afternoon, folks. I have a deck that I am re-decking. Easy job, until I found that all of the footers were rotted out. The deck is bolted to the house on two sides, and the remainder of the deck is supported by 4x4 posts in concrete footers. The deck varies by between 4\" and 12\" off the ground, ... | Replacing Rotted Deck Footings | diy | 2018-05-12T16:38:51.013 |
[
{
"message": "Afternoon, folks. I have a deck that I am re-decking. Easy job, until I found that all of the footers were rotted out. The deck is bolted to the house on two sides, and the remainder of the deck is supported by 4x4 posts in concrete footers. The deck varies by between 4\" and 12\" off the ground, ... | Replacing Rotted Deck Footings | diy | 2018-05-12T16:38:51.013 |
[
{
"message": "I have a faucet from an old house (Over 20 Years Old) and am having issues with the sink leaking. This isn't a problem because I'm familiar with how to fix it (Replace Rubber Washer) and have diagnosed (By turning the water valves at the bottom of the sink) that the leak only happens when the hot ... | How to loosen traditional faucet stem? | diy | 2018-05-14T19:34:51.737 |
[
{
"message": "When the power goes out and I use my generator I am currently running an extension cord through a cracked door from the garage into the house, down the basement stairs and to my sump pump (which is all that I'm concerned about during a storm, when the power usually goes out.)What I would like to d... | Passing a generator extention through a wall for use in a power outage | diy | 2018-05-15T21:25:50.010 |
[
{
"message": "I have two adjacent light switches sharing a box. Live black wire comes from house control panel to the box. Then, presumably, each of the other two wire inputs into the box go one each to an interior light and an exterior light.<a href=\"https://i.stack.imgur.com/2iQDM.jpg\" rel=\"nofollow norefe... | Problem with adjacent light switches | diy | 2018-05-15T22:17:50.753 |
[
{
"message": "Looking for some structural wisdom :)I have a deck that sits 6 feet off the ground, and I want to build a pergola whose \"roof\" (beams/slats) are 9 feet above the deck. So, from ground (grass) to roof beams, would be 15 feet (6+9).I don't want to build the pergola ON the deck, because I don't kno... | Is a 15 foot tall pergola not feasible? | diy | 2018-05-19T18:00:34.637 |
[
{
"message": "I've become fairly familiar with the clearance and creepage requirements of UL/IEC/etc 60950, 60730 and derived/related standards. I've just realised, though, that they only refer to distances through air (clearance) or along a surface(creepage). In fact, solid insulation is specifically used as a... | Clearance through pcb | electronics | 2017-08-04T04:06:43.973 |
[
{
"message": "I have a basic conecptual question related to series RLC circuit responseAssuming that I have sinusoidal source of the form $$V_{source}=V_m*sin(\\omega*t)$$The equation for voltages in RLC circuit can be given as$$\\ d''i(t)/dt + R/L*di(t)/dt + i(t)/(L*C) = V_{source}$$I hope the above equation ... | Solution of current in series RLC circuit for a forcing function | electronics | 2017-08-04T11:34:12.620 |
[
{
"message": "I'm trying to create a dimmer that uses an IC to control the triac firing. My understanding is that I need a random phase optocoupled triac driver. However I need to know when the zero crossing is on the IC. I've seen circuits similar to below for optocouplers<a href=\"https://i.stack.imgur.com/NL... | IC controlled triac dimmer design, zero crossing detection and inductor sizing | electronics | 2017-08-04T19:36:19.760 |
[
{
"message": "<a href=\"https://i.stack.imgur.com/CwNXO.png\" rel=\"nofollow noreferrer\">Hello everyone, I have the above circuit connected to my computer. The Pro Micro is running the following program (code <a href=\"https://pastebin.com/0kERGcgF\" rel=\"nofollow noreferrer\">HERE):Check if computer is on or... | Arduino fingerprint sensor turning computer on/off | electronics | 2017-08-04T20:05:15.503 |
[
{
"message": "I want to determine the currents in each of the branches.<blockquote> I could analyse the current mirror portion and the differential amplifier portion, but facing problem thereafter. I could find the collector current of \\$ Q_2 \\$.But i need to find the current through \\$ R_C \\$ connecte... | Differential and Multistage Amplifiers(BJT) | electronics | 2017-08-04T21:18:35.507 |
[
{
"message": "I am designing a basic preamp using the LM741 opamp to amplifier frequencies from 20 to 20KHZ to a 10Kohm load, input voltage is 0.5V and I get an output voltage of around 2V, what else can I do to reduce noise and distortion? <a href=\"https://i.stack.imgur.com/jCnfq.png\" rel=\"nofollow noreferr... | How can I optimise and improve this circuit for audio applications? | electronics | 2017-08-04T23:05:02.890 |
[
{
"message": "So i want to make a rgb led strip setup with irfz44n mosfets. The datasheet says that once 4.5v is applied on the gate the mosfet will start to let through about 9 amps. My psu is only 5 amps. Does this mean i can't dim the colors when using the arduino's analog pins?EDIT:Sorry for not being clear... | Arduino led strip mosfets irfz44n | electronics | 2017-08-05T16:19:29.490 |
[
{
"message": "I'm looking for a connector with following qualities:fine pitched (max 1.0 mm, preferably 0.8mm or less)double rowpin count of 20 or morerugged design, resistant to vibrationsrelatively affordable - but quality is most importantAfter a long search, I found the Hirose DF50 series. DigiKey describes... | Tips for fine pitch and rugged connector | electronics | 2017-08-05T20:27:03.610 |
[
{
"message": "Requirements: I would like to design a circuit that uses an in-amp, and it needs dual supply (+/- 3V at least). I want it to use two lipo cells so it can be recharged. The output from the circuit is a headphone (earphone). I can have 32 ohm headphones, but that is the max. (There are 600 ohm phone... | Lipo powered earphone amp | electronics | 2017-08-06T11:10:39.680 |
[
{
"message": "For a project I'm working on I need to use an audio jack to input into an Arduino. I found <a href=\"http://www.ebay.com/itm/3-5mm-Audio-Jack-to-DIP-Adapter-Board-Breadboard-2-Channel-Socket-Breakout-HM-/401165654848?hash=item5d67561b40:g:yQwAAOSwARZXpFD-\" rel=\"nofollow noreferrer\">this one on... | How to figure out what each pin does on an audio jack | electronics | 2017-08-06T14:45:46.053 |
[
{
"message": "I am studying the textbook Fundamental of electric circuit by Charles and Sadiku. In section 10.9.2, the textbook discusses oscillator and uses Wien bridge oscillator as an example. I was not able to understand how the harmonic oscillations are generated and how they are alimented by the dc source... | How does Wien bridge oscillator work | electronics | 2017-08-06T22:33:07.533 |
[
{
"message": "I need to calculate the gain of this op amp circuit. It look like a differential op amp circuit, but i only have one resistor in the feedback loop, R3. This circuit functions as a Voltage level shifter by adding 2.5V DC offset to the AC input. <a href=\"https://i.stack.imgur.com/ffi8k.png\" rel=\"... | How to determine the gain of this OP AMP circuit? | electronics | 2017-08-07T09:02:56.083 |
[
{
"message": "Sorry for my obvious question, but I am not from the field of electronics and electric engineering.I was reading <a href=\"http://iopscience.iop.org/article/10.1088/0022-3727/47/45/455302/meta\" rel=\"nofollow noreferrer\">this article: The first sentence in the introduction says: \" All solid... | Side effect of dielectric polarization | electronics | 2017-08-07T13:49:43.560 |
[
{
"message": "I'm starting my first scratch design FM receiver. I pulled the S parameters from an RF amplifier datasheet and designed an input matching circuit. A new question popped up when I looked at the spice outputs:The matching circuit is showing that the signal is maxed out around -11.6 dB. The amplifier... | Passive Impedance Match Losses | electronics | 2017-08-07T14:09:15.537 |
[
{
"message": "I have some silly question that I hope someone can answer.If a coord, connected to the wall socket, is damaged exposing the wires inside, and one accidentally touches these wires, would the current going through the body to the ground be lethal. I would assume it is, but I have read that the resis... | High voltage and electric shock | electronics | 2017-08-07T18:07:03.613 |
[
{
"message": "SetupI have an STM32F103C8T6 minimal eval board (see <a href=\"https://www.aliexpress.com/item/stm32f103c8t6-stm32f103-stm32f1-stm32-system-board-learning-board-evaluation-kit-development-board/32817069163.html?spm=a2g0s.9042311.0.0.4FmVO6\" rel=\"nofollow noreferrer\">STM32F103C8T6).And I'm using... | OpenOCD child process termination: Wrong device detected | electronics | 2017-08-07T19:56:16.970 |
[
{
"message": "I am curious if this could work. I have 3 inputs (A,B,C) and I know that Input A takes the longest to calculate. <br>Is it possible to use single Transistors in place of normal AND Gates so that a signal from A will have less propagation delay (if any?) to reach the Output? How long would the dela... | Using Transistors as Logic Gates | electronics | 2017-08-07T23:58:14.887 |
[
{
"message": "The excerpt below is from the book Pulsewidth Modulated DC-to-DC Power Conversion: Circuits, Dynamics, and Control Designs by Byungcho Choi.It looks a bit long but my main question is why the implementation of current sensing network (CSN) by sensing the switch current is simpler than that of sens... | Why the implementation of current sensing network (CSN) by sensing the switch current is simpler than that of sensing inductor current? | electronics | 2017-08-08T04:35:30.267 |
[
{
"message": "I plan on building the following circuit with TIP142 and TIP147.<a href=\"https://i.stack.imgur.com/fBHS7.png\" rel=\"nofollow noreferrer\">Source: <a href=\"http://www.circuitsgallery.com/2012/06/h-bridge-motor-driver-theory-practical.html\" rel=\"nofollow noreferrer\">Circuits Gallery.Can you us... | Can this H-Bridge circuit be used with 12V? | electronics | 2017-08-08T09:03:18.070 |
[
{
"message": "I want to build a circuit with multi AND logic which may trigger different LED by different combination of switchHere is my thought:<a href=\"/plugins/schematics?image=http%3a%2f%2fi.stack.imgur.com%2fvor4X.png\">simulate this circuit – Schematic created using <a href=\"https://www.circuitla... | Multi-AND circuit | electronics | 2017-08-08T10:39:48.643 |
[
{
"message": "In a text I'm confused about a part concerning BJT transistor operation:<a href=\"https://i.stack.imgur.com/TFK1F.png\" rel=\"nofollow noreferrer\">Below is the paragraph regarding the above transistor models:<a href=\"https://i.stack.imgur.com/q2p8q.png\" rel=\"nofollow noreferrer\">The text expl... | A question about power amplification concept of a BJT | electronics | 2017-08-08T14:37:10.733 |
[
{
"message": "In a text I'm confused about a part concerning BJT transistor operation:<a href=\"https://i.stack.imgur.com/TFK1F.png\" rel=\"nofollow noreferrer\">Below is the paragraph regarding the above transistor models:<a href=\"https://i.stack.imgur.com/q2p8q.png\" rel=\"nofollow noreferrer\">The text expl... | A question about power amplification concept of a BJT | electronics | 2017-08-08T14:37:10.733 |
[
{
"message": "<a href=\"/plugins/schematics?image=http%3a%2f%2fi.stack.imgur.com%2f0RIEe.png\">simulate this circuit – Schematic created using <a href=\"https://www.circuitlab.com/\" rel=\"nofollow\">CircuitLabPlease read the LM358 as LM339 as I could not find LM339 in schematic libraryI am designing a LC... | LC Tank Circuit frequency error | electronics | 2017-08-09T14:52:35.093 |
[
{
"message": "I make USB cables (USB-A to Mini or Micro primarily), but don't have any experience with USB-C. I would like to create a cable that has a USB-A (2.0) connector on one end, and a USB-C connector on the other (mainly for connecting keyboards to CPUs, and charging devices). How do I wire this properl... | Wiring diagram for USB-C to USB-A cable? | electronics | 2017-08-09T15:33:41.553 |
[
{
"message": "<a href=\"https://i.stack.imgur.com/Ho9Kn.jpg\" rel=\"nofollow noreferrer\">Can anyone tell me how it works?In my opinion when U+ = U- the voltage Uo is constant no matter of the load resistor(R5). But this is only if U+=U-.",
"role": "user"
},
{
"message": "This arrangement is usually... | Parallel Regulator | electronics | 2017-08-09T18:03:07.950 |
[
{
"message": "I am using a <a href=\"https://www.pololu.com/product/2511/specs\" rel=\"nofollow noreferrer\">Pololu DRV8355 dual motor driver. According to the specs, it requires voltage between 1.5V and 11V to operate. I'd like to use two 3V motors with it, and also power an Arduino (Mega 2560) board through i... | Voltage for motor driver | electronics | 2017-08-09T21:22:45.240 |
[
{
"message": "I'm trying to drive LEDs for the purposes of a strobe light. I'm planning on driving the LEDs at ~60 fps, and for ~100 us pulses to provide very sharp strobe images.If the pulses are very short and infrequent, you end up needing extremely bright LEDs to make up for how infrequent the LEDs are \"o... | Overdriving LEDs with high currents | electronics | 2017-08-09T21:40:33.647 |
[
{
"message": "I have a transformer found on my old computer ups.I dont understand its pin out. It has black and red lead one side. And on adjacent side it has four wires connected with a female connector.I want to make a bench power supply for my lab with it.<a href=\"https://i.stack.imgur.com/61QuE.jpg\" rel=\... | Old transformer input output | electronics | 2017-08-10T03:39:03.020 |
[
{
"message": "I need to use an ISO124P isolation amplifier. The data sheet for the device is here <a href=\"http://www.ti.com/lit/ds/symlink/iso124.pdf\" rel=\"nofollow noreferrer\">http://www.ti.com/lit/ds/symlink/iso124.pdfMy question is with regards to powering the amplifier. I am really confused with the po... | Powering ISO124P Isolation Amplifier | electronics | 2017-08-10T08:02:44.460 |
[
{
"message": "Need a Timer circuit like, for 20 sec it should be on then completely off. generally RC timer gets off gradually so the buzzer sounds for long.Thanks in Advance.",
"role": "user"
},
{
"message": "<blockquote> generally RC timer gets off gradually so the buzzer sounds for long.</blockq... | Hi Can we have delay timer with one Shot ON/OFF? | electronics | 2017-08-10T09:11:05.060 |
[
{
"message": "<a href=\"http://www.farnell.com/datasheets/1833817.pdf\" rel=\"nofollow noreferrer\">http://www.farnell.com/datasheets/1833817.pdfI was assigned a task where I have to connect an LTC2323-12 ADC (analogic to digital converter) to an FPGA.Reading the LTC2323-12 datasheet seemingly it has two ways t... | How does CLKOUT works on the LTC2323-12 ADC on "High-speed" speed mode? | electronics | 2017-08-10T11:26:23.280 |
[
{
"message": "I want identify JTAG pinout on the target board, using the JTAGenum tool.I have read the <a href=\"https://github.com/cyphunk/JTAGenum/blob/master/JTAGenum.ino\" rel=\"nofollow noreferrer\">JTAGenum code, and want to clarify a few point about user configuration. JTAGenum can identify 4 mandatory p... | Detecting JTAG pinout | electronics | 2017-08-10T14:17:35.160 |
[
{
"message": "I am looking for an op amp to use as a unity gain buffer with a disable feature. The OPAx890 looks like a good candidate because it is unity gain stable.I have noticed that some op amps labeled as unity gain stable have worse stability than others (e.g. OPA690 claims unity gain stability, but its ... | Frequency response of dual vs single op amp: OPA2890 vs OPA890 | electronics | 2017-08-10T17:16:53.857 |
[
{
"message": "I want to build something that behaves like a regular magnetic compass, but using this <a href=\"http://wiki.seeed.cc/Grove-6-Axis_AccelerometerAndCompass_V2.0/\" rel=\"nofollow noreferrer\" title=\"Grove - 6-Axis Accelerometer&Compass V2.0\">electronic compass and some motor what will rotate ... | Motor of what type should I choose? | electronics | 2017-08-10T20:36:55.720 |
[
{
"message": "I've looked at DC-DC converters for 12v to 18v and they usually have low amperage ratings. One for $50 can use 15A with 25A spikes. But cordless tools can pull much more than that, especially the saws (I've read up to 70A). I want to run a cordless reciprocating saw off my car battery (clearing so... | 12v to 18v for tools from car battery | electronics | 2017-08-10T21:07:49.450 |
[
{
"message": "I have encountered a rather strange problem in Altium Designer 17.1. I am using the special strings VersionControl_RevNumber and VersionControl_ProjFolderRevNumber to keep track of our PCB Revisions as we are cutting new boards about every two weeks due to some pretty crazy scope changes in the pr... | Altium VersionControl_RevNumber special string | electronics | 2017-08-10T21:45:42.727 |
[
{
"message": "On an iMac and a Macbook, both running macOS Sierra 10.12.6, I have installed the latest LTspice IV (Build Oct 3 2016, 14:49:11 US Pacific), which prompts me to update on launch. Attempting to do so via either the Model Update or Software Update buttons in the Operation tab causes the spinning whe... | How do I update LTspice IV for macOS? | electronics | 2017-08-11T05:29:28.090 |
[
{
"message": "I am designing a Class D audio amplifier. Im using a 40Khz triangular wave to modulate my input audio signal of 1Khz. However when I designed my low pass filter(cut-off frequency=20Khz), I still get the triangular wave frequency at the output. this shows my LPF isnt working. Is there any reason wh... | low pass filter class d amplifier | electronics | 2017-08-11T13:38:42.420 |
[
{
"message": "I have my own designed board. It has USB device interface circuit.The MCU is LPC1769 Cortex M3.Basically when I use USB bus power for the board, its USB device feature is working. It means when I connect to PC, it is identified.But when I supply the board with external power, then the usb device f... | usb device feature isn't working in case of external power supplied into the board | electronics | 2017-08-11T15:15:34.143 |
[
{
"message": "Small background: I would print a PCB with an ATMEGA. Per Gammon website instruction (<a href=\"http://www.gammon.com.au/breadboard\" rel=\"nofollow noreferrer\">http://www.gammon.com.au/breadboard) we need 2 ceramic capacitors, on both \"side\" of Atmega, connected to the VCCs and GNDs.I cannot f... | Are these circuits equivalent? (Arduino on breadboard) | electronics | 2017-08-11T15:41:29.457 |
[
{
"message": "I'm very new to the world of EE and I'm attempting to build my first buck/boost converter using Linear Technology's LT8390A.For the most part I have been able to follow the datasheets instructions; however, the one thing I'm unsure about is how to calculate the necessary power ratings for each of ... | LT8390A Resistor Power Ratings | electronics | 2017-08-11T16:57:50.653 |
[
{
"message": "I'm currently converting an old MP3-player (a Creative Zen Stone) to a standalone music player for my children. One of the things I'd like to do is to add an LED which shows whether the device is powered on or off.Due to how the MP3-player is built, the only place where I can easily modify the cir... | Add a status LED to an existing device | electronics | 2017-08-12T15:44:22.083 |
[
{
"message": "I have a SP4T slider switch, where common is connected to the power rail and each pin is connected to a led and resistor. The problem is, if I position the switch between two terminals, the leds of both terminals light up. Is this a sign of a bad switch? Even if it is, are there any way to prevent... | SP4T slider switch on two states at the same time | electronics | 2017-08-12T16:40:39.917 |
[
{
"message": "This is a 4x3 numeric keypad. An output RB3, RB4, or RB5 may be connected to an input RB9, RB8, RB7, or RB6 by a pushbutton. The inputs have internal weak pull-ups. When the pushbutton in yellow square is pressed, RB3 and RB7 connect, rendering RB7 logic 0.If a logic 1 voltage supply is provided b... | How can a logic 0 change a logic 1 to logic 0 given these circumstances? | electronics | 2017-08-12T21:09:30.780 |
[
{
"message": "The circuit is composed of four phase shift opamp stages each with a JFET used as a variable resistor. Part of the circuit I do not understand is the DC biasing arrangement. I can see that it uses a 4.5V Zener diode to provide the 1/2 VCC supply as this circuit runs off single 9VDC supply. I do no... | DC biasing arrangement in this audio phase shifter circuit | electronics | 2017-08-13T15:31:24.363 |
[
{
"message": "So basically I'm using a 74HC595 shift-register to control 8 LEDs by manually giving the chip pulses with knobs instead of something like an arduino. On the arduino.stackexchange website this question got denied by users because it seemed to be off-topic. It was actually as a test for me to unders... | Could someone take a look at this Tinkercad file? | electronics | 2017-08-13T18:35:14.187 |
[
{
"message": "I'm quite new to the Tesla Coil stuff and I want to build a VTTC form a GU-81 tube. I'm using schematics from this <a href=\"https://www.instructables.com/id/GU-81-VTTC/\" rel=\"nofollow noreferrer\">Instructable.I don't want to make anything I don't understand and although I understand basic Tesl... | Vacuum Tube Tesla Coil (VTTC) schematic interpretation | electronics | 2017-08-13T20:14:43.903 |
[
{
"message": "<a href=\"https://i.stack.imgur.com/xl62d.png\" rel=\"nofollow noreferrer\">I am designing a Raspberry Pi hat that needs to be able to accept inputs from 3 different water meters. Two of the inputs are 4-20mA signals, the third input being a pulse signal. At the top I have two powered 4-20mA loops... | Raspberry Pi hat design | electronics | 2017-08-13T22:40:00.133 |
[
{
"message": "I want to send messages back and forth between two STM32s. Probably STM32F407VET6, but it would be nice if I can try already something for a simple one (STM32F103C8T6).My requirements:round trip delay time: preferably 1 ms max (excluding processing), for messages with a payload of around 8 bytes.d... | Communication between two STMs over 2 meter with small latency | electronics | 2017-08-14T07:51:37.357 |
[
{
"message": "If I have an <code>MCU</code>, e.g. <code>ATTiny85</code>, and I connect a <code>5V</code> source to a pin on the <code>MCU</code>, what current is flowing?My understanding is that the pin I'm connecting to will be at <code>0V</code> and if I connect the <code>5V</code> source then a large current... | Current Flow into MCU pin | electronics | 2017-08-14T11:43:16.010 |
[
{
"message": "I am confused as to how the following circuit will work(????)<a href=\"https://i.stack.imgur.com/3jr9M.png\" rel=\"nofollow noreferrer\">Lets assume that there is no AC signal and only a DC signal is applied.According to the books this is a voltage follower stage i.e Vo will be equal to Vi. But ho... | Basic questions regarding Push Pull stage | electronics | 2017-08-14T15:29:42.650 |
[
{
"message": "I tried to do this question but do not understand what this graph is. I know it is a binary value for the D0,D1,D2,D3 inputs but what is the value ?And is this the correct formula for final Vout?$$ V_{out}= -(\\frac{D3}{1}+\\frac{D2}{2}+\\frac{D1}{4}+\\frac{D0}{8})*V_{in}*\\frac{Rf}{R}$$<a href=\"... | Binary Weighted DAC | electronics | 2017-08-14T16:07:24.823 |
[
{
"message": "casual beginner electronics hobbyist here.I read an <a href=\"http://jaunty-electronics.com/blog/2013/04/l-network-impedance-matching/\" rel=\"nofollow noreferrer\">article online describing how to impedance match a resistive source impedance of 75 ohms to a resistive load impedance of 1k ohms. In... | L-Network impedance matching | electronics | 2017-08-15T00:07:05.790 |
[
{
"message": "Is it possible for (W/L) of 0.18nm PMOS to become 989100 ? If not,i wonder what the range is for (W/L) of TSMC 0.18nm PMOS and NMOS.Thanks a lot.",
"role": "user"
},
{
"message": "Theoretically you can make any W/L you want. But as the ratio gets higher you might want to look for alter... | Is it possible for (W/L) of 0.18nm PMOS to become 989100? | electronics | 2017-08-15T01:33:44.467 |
[
{
"message": "I have a project I'm working on that involves an nrf51822 communicating with the optical sensor from a mouse. The pinout of the opical sensor seems similar to the ADNS2620, but the exact datasheet is not available. The datasheet for the ADNS2620 seems to basically say (but not explicitly say) th... | Is i2c the right protocol for this sensor? | electronics | 2017-08-15T02:54:43.160 |
[
{
"message": "I want to send data to atmega 2560 from my laptop using two Xbee S2C.The first Xbee , let's label it A , is to be interfaced with the laptop.The second Xbee , let's label it B , is to be interfaced with the atmega 2560.I want to know how to configure these Xbees to communicate with each other.I am... | Communication between laptop and atmega2560 via two Xbee S2C | electronics | 2017-08-15T06:34:25.657 |
[
{
"message": "My battery just died yesterday (actually left the lights on). Took it out for charging today but my new automatic charger for detect such low voltage to begin the charging process. So, I had to hook it up to my great old Lucas charger (attached pic below) but only to notice there was no defection ... | Replacing the selenium rectifier in a vintage car battery charger | electronics | 2017-08-15T09:09:47.990 |
[
{
"message": "The spice model for the MCP601 op-amp by Microchip results in the following error when used in LTSPICE:<pre><code>Analysis: Time step too small; time=1.6021e-005, timestep==1.25e-019:trouble with node \"u1:30\"</code></pre>I believe this to be a comparability issue, since it is commented in the mo... | Help converting PSPICE model to LTSPICE | electronics | 2017-08-15T12:32:26.293 |
[
{
"message": "I'm a mostly analog EE who's trying to set up an fpga dev kit (terasic de0-nano) to twiddle the control bits on some pulse control parts I'm doing an evaluation board for. I'm using an external dip switch to change an output pulse width and I want to confirm which pulse width selection I'm in by l... | Eliminate VHDL inferred latch in case statement | electronics | 2017-08-15T19:14:48.230 |
[
{
"message": "In DC circuits, if I have a device that gets switched on and has a large inrush current, I can just put a large charged capacitor near the power switch (parallel to the device) to source the surge. This protects the DC power supply from the inrush current and the DC source can take its sweet time ... | Energy storage for AC inrush currents | electronics | 2017-08-15T20:29:42.987 |
[
{
"message": "If we want to filter a digital signal let's say through an RC circuit, can we treat it as a sine wave? For example, if there is a 100 kHz clock, my guess is that we can't treat it as a 100 kHz sine wave but we need to perform Fourier analysis and find the frequency spectrum and then work with the ... | Digital Frequencies vs. Sine Wave | electronics | 2017-08-15T22:31:04.423 |
[
{
"message": "We have small bags in 2 different colors that pass through a hole of about 40cm. The bags can be dropped and so they pass very fast.We have to know which kind passed through the hole.I was looking for many ways that will keep the bags passive without batteries.This is commercial and many bags will... | Identify object that pass through a hole? | electronics | 2017-08-16T06:45:55.103 |
[
{
"message": "I recently wired up a 555 timer in a mono stable configuration and found that when the trigger was held low for longer than the configured output pulse width, the output would stay high. After thinking about this.. it made sense. My 555 timer is wired like so:<a href=\"https://i.stack.imgur.com/9e... | Why does this Edge Trigger Work on input of 555 monostable config? | electronics | 2017-08-16T07:31:16.547 |
[
{
"message": "I have just bought <a href=\"https://www.amazon.co.uk/gp/product/B00OIHLTME/ref=ox_sc_act_title_1?smid=A2SCHN5ORI8W2E&psc=1\" rel=\"nofollow noreferrer\">this pump to circulate coolant through an experiment. I would like to control the pump output as it doesn't have any control on it. It is be... | Controlling a 5W 12V DC water pump | electronics | 2017-08-16T10:14:46.253 |
[
{
"message": "I need to control a 12V water pump (<a href=\"https://www.amazon.co.uk/gp/product/B00OIHLUFA/ref=ox_sc_act_title_1?smid=A2SCHN5ORI8W2E&th=1\" rel=\"nofollow noreferrer\">like this) to a Raspberry PI zero W.Can I control it from the 5V power out port using a <a href=\"https://www.amazon.it/gp/p... | Controlling a 12V water pump to Raspberry PI fire back | electronics | 2017-08-16T11:10:14.227 |
[
{
"message": "I am working on a system that should transfer some integer data on a distance of couple of kilometers in a mountainous area and should be as cheap as possible. I've read about LoRa modules and the like but they are quite expensive and also tend to be much less effective when surrounded by obstacle... | Using lower frequency signals to transfer data | electronics | 2017-08-16T11:39:59.900 |
[
{
"message": "I need to make a battery powered frequency to voltage converter that will monitor very minor frequency changes, around 100Hz with base frequency of 3-5MHz (may vary during operation); something like a very wide band FM demodulator. I found <a href=\"http://www.edn.com/design/analog/4411932/Two-ICs... | Designing a senvitive frequency to voltage converter | electronics | 2017-08-16T14:46:07.007 |
[
{
"message": "I recently asked a question about controlling a magnetic relay with a solid state relay.The reason is that I'm controlling the circuit with a MCU that has a max ouput of 40mA per output pin and the coil on the relay draws 70mA. Also, the MCU is operating at 1.8V and the relay coil is 12V (as is th... | using 1.8V, max 40mA to switch a 12V, 70mA load (MOSFET data sheets?) | electronics | 2017-08-16T16:24:18.650 |
[
{
"message": "I have tried implementing a design involving AT90usb646 about four times but in each case the board gets connected and immediately disconnects . lsusb outputs that an Atmel Corp device has been connected so I know that the board is working but it gets disconnected before I can do anything with it ... | USB problems with AT90USB646 | electronics | 2017-08-16T18:55:32.590 |
[
{
"message": "What is the definition absolute maximum ratings? Does it vary from manufacturer to manufacturer?",
"role": "user"
},
{
"message": "There are three operating zones hereThe ratings of a part can be divided into three zones: \"nominal\" (or Recommended Operating Conditions), \"off-nominal... | What is the definition of absolute maximum ratings? | electronics | 2017-08-17T04:35:46.530 |
[
{
"message": "Can a MicroSD memory card work at a 144 kHz or lower frequency? I want to read a text file that has a syntax that would be filtered and matched to a speaker. I would like to get data from the MicroSD but my circuit can't work with a high frequency.I have a 144 kHz 555 IC and it had worked with a s... | Can a MicroSD card work at 144 kHz or lower? | electronics | 2017-08-17T11:07:50.120 |
[
{
"message": "I'd like to have an LED strip with two levels of lighting, one triggered by motion sensor (7v because I've tested the meter long smd3528 strip and it operates at low steady level at 7v), and the other 5v to boost up to 12v on a switch (connected to pantry door) for the strip giving me full light.T... | Two level LED strip on different voltage with separate switches | electronics | 2017-08-17T21:04:59.610 |
[
{
"message": "Need help to find out this datasheet or similar model parts that can i replace with this...???i have have a problem with this transistor...this transistor front pin broken from body i want to replace it but i did not find out any salutation .....its marking code is wrote in up ( N1Z5 ) that u see ... | Need help to find out this datasheet or similer model parts that can replace with this? | electronics | 2017-08-18T11:26:39.493 |
[
{
"message": "I have an NPN LJ12A3-4-Z/BX proximity sensor that I want to use to detect water usage on a water meter that has a rotating iron disk.To make sure I don't overpower the 3.3v GPIO inputs I want to use a reed relay SIP-1A05 to keep the 5v circuit separate. But connecting input pin 18 to the relay doe... | Connecting NPN proximity sensor to rpi3 using reed relay | electronics | 2017-08-18T12:28:12.590 |
[
{
"message": "I am building a data transmitter for which I chose FSK modulation. The frequencies should be around 27 MHz. I have single crystal with 27 MHz frequency and I need to get two separate frequencies that will be different. I thought about amplifying the signal to generate harmonics, from which I will ... | Generating two signals with small difference in frequency using one oscillator | electronics | 2017-08-18T13:35:00.620 |
[
{
"message": "I have a STM32F103C8T6 (later I want to more to STM32F407VET6). Both have support for CAN. But what does this mean?I bought (not received yet) an <a href=\"https://www.aliexpress.com/item/Free-Shipping-MCP2551-high-speed-CAN-protocol-controller-bus-interface-module/32473879548.html?spm=a2g0s.90423... | What additional components/boards are needed to use CAN with an STM32? | electronics | 2017-08-18T14:02:55.083 |
[
{
"message": "I got a question about the PCIe bifurcation setting when booting up in X86 system.Normally, we can set the PCIe controller to be X16, two X8, or four X4 in the UEFI shell menu. However, there is an auto detection way to do the same thing automatically. For example, if I put four X4 devices on the... | Anyone knows how X86 platform set the PCIe bifurcation at boot up? | electronics | 2017-08-19T03:34:24.353 |
[
{
"message": "I set a circuit that shows how the electromagnetic induction works. But as what i studied in physics class, there will be alternating current but there's nothing that seems to create an AC! All electric components that i used was coil, breadboard, transistor, resistance, battery and LED. The pict... | Is it possible to create AC with just battery, transistor and coils? | electronics | 2017-08-20T10:44:53.870 |
[
{
"message": "I have a CD4529BCN Dual 4-Channel Analog Data Selector (<a href=\"http://www.datasheets360.com/pdf/-5499058989021646423\" rel=\"nofollow noreferrer\">datasheet).Here is the truth table: <a href=\"https://i.stack.imgur.com/uv1Lb.jpg\" rel=\"nofollow noreferrer\">Here is the problem:<br>I have two ... | How can I use a dual 4-channel analog multiplexer independently? | electronics | 2017-08-20T11:59:37.530 |
[
{
"message": "I'm interested in the LVDS communication between a Zynq (<a href=\"https://www.xilinx.com/support/documentation/data_sheets/ds187-XC7Z010-XC7Z020-Data-Sheet.pdf\" rel=\"nofollow noreferrer\">Xilinx, xc7z020-1C) and a camera (<a href=\"http://www.onsemi.com/pub/Collateral/NOIP1SN1300A-D.PDF\" rel=\... | LVDS: length matching within a pair and between pairs | electronics | 2017-08-20T22:07:39.510 |
[
{
"message": "I have a reversing camera in my car that I wish to:switch on whenever the reverse lights come onturn off when reverse lights go off. Problem is, my car's computer will periodically send these short (let's say 100 ms) 12V pulses to the reverse lights to test whether they are present (simple resist... | Can I use a 555 to ignore short DC pulses in simple switch circuit? Not same as usual debouncing | electronics | 2017-08-21T00:13:39.323 |
[
{
"message": "I've been reading J.White's High Frequency Techniques, and in one passage is says: <blockquote> If the two port is a passive network, one might expect that the insertion loss could range from 0 dB (no loss) to some finite loss (a positive decibel value). But this is not necessarily so. For exam... | How can an insertion loss provide gain | electronics | 2017-08-21T10:17:19.390 |
[
{
"message": "Our SoC device supports both external NAND devices as well as Multi-IO/QSPI NOR devices.I can use either of them.Now, for NAND device, it will store only Program Code and Const Data.That means SoC will never write anything back to NAND device. It will always read from the NAND device.Do I need to ... | Embedded External Flash Device using NAND architecture | electronics | 2017-08-21T17:46:23.517 |
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