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 |
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[
{
"message": "I know how voltage triangle is formed for RL circuit. But I am not understanding how impedance triangle is formed. Is it derived from voltage triangle ? If so, how it is derived from voltage triangle ? Please don't tell that divide each side of voltage triangle with current 'I' to form impedance t... | How Impedance triangle is formed? | electronics | 2018-04-25T15:26:37.943 |
[
{
"message": "To layout my situation, I have a 12V DC pump with a built in float switch that I don't want to try to crack open and possibly compromise the waterproof of. The pump draws around 6-7 amps. I would like for an alarm to sound when the pump is running, and was thinking of trying to use a relay to tr... | Is there a way to put a relay in series with another load? | electronics | 2018-04-25T18:22:34.643 |
[
{
"message": "I do hope this post is still within the boundaries or spirit of this forum and perhaps this question is best suited for the chat instead.I'm sure we all are experiencing (in one form or another) the industry-wide part shortages for discrete MLCC (caps) and resistors, in like the 0402/0603/0805 pac... | MLCC Shortages and Work-Arounds | electronics | 2018-04-25T18:27:22.200 |
[
{
"message": "I have written a bootloader before for a STM32 that had support for the vector offset and is easy peasy.For STM32F0xx using HAL I read I need to move the vector table to ram and copy from flash. I have done as far as I know all the steps described here:<a href=\"http://marcelojo.org/marcelojoeng/2... | Remapping vector table in STM32F0 (no vector offset register) | electronics | 2018-04-26T07:03:00.953 |
[
{
"message": "I'm try to build a cheap pressure transducer to use with my cheap Hantek 1008c scope for automotive measurements. When I started taking measurements and testing it, I saw a 40mv peak to peak, approximately 1kHz sine wave riding on the output signal. I think this is just noise from a cheap transd... | How to reduce AC sine wave noise | electronics | 2018-04-26T08:55:36.127 |
[
{
"message": "I am designing the layout of a PCB for audio applications (no digital electronics, only analog).All components are through hole, the PCB is pretty large (about 16cm x 10cm) and has 2 layers. Plated through hole are supported by the technology I am using. The circuit has a dual supply.Which (and wh... | 2-layer PCB design, through hole technology and ground plane | electronics | 2018-04-26T09:01:27.347 |
[
{
"message": "I have a schematic for a current sensing circuit using a dedicated TI differential amplifier part for current sensing applications. The schematic also includes an \"impedance matching\" part for connecting the voltage output of the differential amplifier to a BNC coaxial cable. This coaxial cable ... | How does this impedance matching circuit work? How to simulate it correctly in SPICE? | electronics | 2018-04-26T10:49:18.067 |
[
{
"message": "Is it possible to have different x-axes for different plot panes in LTspice? For example, In following circuit, can I plot both output characteristics and transfer characteristic curves simultaneously in two plot panes? i.e. one x-axis is V1 and other x-axis is V2<a href=\"https://i.stack.imgur.co... | LTspice: Is it possible to have different plot panes with different x-axes? | electronics | 2018-04-26T10:56:45.903 |
[
{
"message": "I'm building a JTAG programmer for the <a href=\"https://www.nxp.com/products/processors-and-microcontrollers/additional-processors-and-mcus/digital-signal-controllers/digital-signal-controller:DSP56F803\" rel=\"nofollow noreferrer\">old Motorola 56k devices and I want to add some circuit protecti... | Protecting against reverse polarity | electronics | 2018-04-26T14:07:20.350 |
[
{
"message": "I have a low power solar cell producing roughly 25uA at 1.13V.What I would like to do is to make a circuit that could store the energy from the solar cell until it reach the voltage and current needed to light up a LED for 1s or just \"flash\" it. The idea is to show that the solar cell can provid... | How supply or flash a LED with a low power solar cell? | electronics | 2018-04-26T15:03:20.930 |
[
{
"message": "After dealing with software debouncing for a while, I find it takes a huge toll on the system, so I thought of initially making a hardware debouncer with one Schmitt trigger (74HC14), a capacitor, button and resistor as shown below from talkingelectronics.com:<a href=\"https://i.stack.imgur.com/4e... | Can multiple Schmitt triggers in series fully debounce a switch? | electronics | 2018-04-26T17:27:21.127 |
[
{
"message": "I have a really big design to do and I'm having a rough time with buses. I have several doubts I hope someone can help me solve.Can I take a bus between sheets using an Off-Sheet Connector? For example:<a href=\"https://i.stack.imgur.com/2AHbQ.png\" rel=\"nofollow noreferrer\">Can I make a bus con... | Altium buses between sheets on a flat design | electronics | 2018-04-26T23:35:55.143 |
[
{
"message": "I have an isolated electrical system composed of a couple of solar panels, 4 x 6V batteries and a 12V -> 120V inverter. I'd like the measure the current flow in and out of the batteries in order to implement a DIY battery monitoring system. To that end, I've purchased a 200A shunt (75mV full scale... | Downsides of using an existing length of wire as a shunt | electronics | 2018-04-26T23:55:05.377 |
[
{
"message": "I have an older working aircon with a broken control-board. Replacing the control-board is not worth the cost for this older unit. I am attempting to wire it as a simple \"on/off\" fashion. Where I am stuck, is with the fan-wiring. The fan model name is \"YDK 16-4\". I have googled and found m... | Need Wiring Help For Aircon Blower Fan | electronics | 2018-04-27T05:44:11.437 |
[
{
"message": "If we have open loop gain of 2dB or 3dB what happens if we use this in closed loop (except the gain reduction)..i mean how does gain affect on the output of feedback amplifier.",
"role": "user"
},
{
"message": "<blockquote> If we have open loop gain of 2dB or 3dB what happens if we us... | Gain of the amplifier | electronics | 2018-04-27T09:12:00.833 |
[
{
"message": "step response is different in simulink showing oscillatory behavior unlike in matlab step function Transfer function<a href=\"https://i.stack.imgur.com/JBqMW.png\" rel=\"nofollow noreferrer\">Step response<a href=\"https://i.stack.imgur.com/UNf2U.png\" rel=\"nofollow noreferrer\">Block diagram in ... | Why simulink step response differs from matlab's step function? | electronics | 2018-04-27T14:30:46.703 |
[
{
"message": "In my circuit I have a comparator which compares the output of a sine wave with a staircase wave, if the staircase is above the sine wave, I wish to use a Mosfet in its cut off mode which will allow the capacitor to full discharge. I have hooked up the output of the comparator to the gate of the M... | How to trigger a pulse until a capacitor fully discharges based on the output of a comparator | electronics | 2018-04-27T18:44:41.967 |
[
{
"message": "I've been looking all over the internet to try to figure out the optimal values for R1, R2, and C but couldn't find info.I'm trying to ideally make a debouncer that will work with any button on the first white keypad listed from <a href=\"http://www.futurlec.com/Keypads.shtml\" rel=\"nofollow nore... | Calculating R and C for schmitt trigger debouncer | electronics | 2018-04-28T02:06:14.630 |
[
{
"message": "<a href=\"https://i.stack.imgur.com/e90aa.jpg\" rel=\"nofollow noreferrer\"><a href=\"https://i.stack.imgur.com/oStip.jpg\" rel=\"nofollow noreferrer\">When loading flyback converter with heavy load, waveforms are as expected. But with light load, waveforms are not as expected. What can be the rea... | flyback converter issue | electronics | 2018-04-28T12:08:19.560 |
[
{
"message": "I want to use several of the 'filled PCBs' below, or other ones, but the question does not change. <a href=\"https://i.stack.imgur.com/Q7W3O.jpg\" rel=\"nofollow noreferrer\">How can I fix such thing in a case, or on a proto/veroboard PCB (like the picture below)? <a href=\"https://i.stack.imgur.c... | How to fix a 'PCB' without mounting holes inside a case (or on a PCB)? | electronics | 2018-04-28T13:51:01.573 |
[
{
"message": "I want to use several of the 'filled PCBs' below, or other ones, but the question does not change. <a href=\"https://i.stack.imgur.com/Q7W3O.jpg\" rel=\"nofollow noreferrer\">How can I fix such thing in a case, or on a proto/veroboard PCB (like the picture below)? <a href=\"https://i.stack.imgur.c... | How to fix a 'PCB' without mounting holes inside a case (or on a PCB)? | electronics | 2018-04-28T13:51:01.573 |
[
{
"message": "I want to measure voltage across a T-line to visualize standing waves on the line.something like this video <a href=\"https://www.youtube.com/watch?v=M1PgCOTDjvI\" rel=\"nofollow noreferrer\">min 6:53 and this experiment <a href=\"http://aaronscher.com/RF_wireless_EM/experiment_10/standing_wave.ht... | Transmission line voltage measurement(visualizing standing wave) | electronics | 2018-04-28T14:13:26.697 |
[
{
"message": "I was wondering how does short-range radar and LIDAR work? Considering the speed of light, the receiver sampling rate would need to be extraordinarily high to detect short-range distances(sub 1-2 feet). How do detectors work that avoid needing this high sampling rate? Is there some other way to me... | Short-range radar and LIDAR, how do they work? | electronics | 2018-04-29T04:12:16.483 |
[
{
"message": "I was wondering how does short-range radar and LIDAR work? Considering the speed of light, the receiver sampling rate would need to be extraordinarily high to detect short-range distances(sub 1-2 feet). How do detectors work that avoid needing this high sampling rate? Is there some other way to me... | Short-range radar and LIDAR, how do they work? | electronics | 2018-04-29T04:12:16.483 |
[
{
"message": "I would like to set up the circuit to charge the 3.7V Li-ion battery using diodes, capacitors,leds,resistors and a zener diode.I have a few questions.1)The color of the led while the battery is charging:-Charging: red-When the charging is complete: greenHow do I do that?2)To charge 3.7V battery, h... | LED color changing according to battery charge status? | electronics | 2018-04-29T13:16:20.560 |
[
{
"message": "I am a noob playing around with nodemcu and esp8266. I am trying to control a motor in an automated air freshener. I had been trying to power the motor with board supply but I gave that idea up when I was unable to manipulate the voltage and current. so now I am trying to just use an npn transisto... | how to use an npn as a switch between battery and motor? | electronics | 2018-04-29T13:56:53.487 |
[
{
"message": "In the following circuit I have to find the output voltage, Vo, related to the input voltage, Vin. We assume that both diodes, D1 and D2, are the same and have a 0.7 V drop when they conduct and op-amps are ideal.I am thinking that at start, before any input is applied, both D1 and D2 are rev... | Op-amps circuit analysis | electronics | 2018-04-29T14:53:06.280 |
[
{
"message": "I'd appreciate if someone can advise and give me an idea about the condition of my battery and my overall set-up.I set-up off grid solar system about 2 years ago, for my parents in my hometownBelow are the following specsBattery 12V- 180Ah (Sacred Sun Brand)Solar Panel - 200W ( but was only produc... | 12V battery is now 10.5V but still producing a lot of power | electronics | 2018-04-29T17:46:50.127 |
[
{
"message": "I'm going to purchase a PYNQ-Z1 FPGA development board from Digilent (Link: <a href=\"https://store.digilentinc.com/pynq-z1-python-productivity-for-zynq/\" rel=\"nofollow noreferrer\">https://store.digilentinc.com/pynq-z1-python-productivity-for-zynq/). However, some of the comments on the linked ... | Can a heatsink protect a PYNQ-Z1 board from damage? If so, which one should I use? | electronics | 2018-04-29T18:43:48.240 |
[
{
"message": "I would like to make the jaw of a plastic skull open/close based on words spoken by a Raspberry Pi. I can make the Pi send the audio to the headphone jack, and would like to use this output to run 5v dc motor which will open the jaw, and the jaw will close with springs when there is no sound out ... | Start/ stop 5v motor from headphones jack | electronics | 2018-04-30T03:05:49.287 |
[
{
"message": "I am currently trying to devise a system using gyroscope+accelerometers placed in on a hat/cap in certain areas of the head (Front-left, Front-right, Centre, Back-left, Back-right). I want to create a system that can determine if the hat is roughly worn incorrectly (ie misaligned, tilted to the si... | Using my sensor values, what are relevant data analysis techniques? | electronics | 2018-04-30T03:47:42.140 |
[
{
"message": "How are phases of a wireless TR/RX pair synchronized for coherent demodulation?I understand PLLs will match the frequency of the local oscillator to the carrier via maintaining a constant phase difference between the received signal and the local oscillator but for coherent demodulation the phases... | How is the phase of a local oscillator synchronized to the carrier for demodulation? | electronics | 2018-04-30T04:29:50.563 |
[
{
"message": "I am trying to solve the following operational amplifier circuit to get its transfer function. I have tried two different approaches, one is elementary approach by finding V- and V+ and equating them. But problem with this approach is that the equations are extremely complicated as there is anothe... | Transfer function of Operational Amplifier | electronics | 2018-04-30T11:47:17.477 |
[
{
"message": "The diagram below represents the position of ocean oil platform system which use the proportional controller with gain \\$k\\$. The output \\$x(s)\\$ is the platform deflection regards the position desired. Consider the platform initial position \\$0\\$ and it subjects of waves forces the sea, whi... | Gain of proportional Controller with distubance \$sin(10t)\$ | electronics | 2018-04-30T16:21:32.507 |
[
{
"message": "<a href=\"https://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/20140003205.pdf\" rel=\"nofollow noreferrer\">This paper on solar power satellite concepts makes brief reference to the ground receiver receiving an elliptical beam due to the angle it is at to the transmitter (2nd paragraph). The ang... | From how wide a range of angles can a grid of dipole antennas efficiently receive a power beam? | electronics | 2018-04-30T17:53:44.170 |
[
{
"message": "I have a pretty bizarre problem with Multisim. I have a larger circuit which works perfectly when the inbuilt square wave generator for Multsim is used. I wish to replace the square wave generator with my own.I have a 555 square generator circuit which works perfectly when I test it by itself, the... | Presence of 555 square wave generator breaks the rest of the circuit even when not connected. | electronics | 2018-04-30T21:01:29.113 |
[
{
"message": "i am working on CAN_bus capacitance sniffer meaning take the 2 data line and without cutting the wire to recrate the signal. and i came across this configuration. i can’t undusted it, can anyone help me?<a href=\"https://i.stack.imgur.com/NmL3L.png\" rel=\"nofollow noreferrer\"><a href=\"https://i... | cant understand this OPAMP configuration | electronics | 2018-05-01T07:39:59.887 |
[
{
"message": "<a href=\"https://i.stack.imgur.com/EDAds.jpg\" rel=\"nofollow noreferrer\">I was thinking \"Circuit Wizard\" is a good simulator for learning electronics and analyzing circuits, but this weird thing was seen on the picture.How can voltage measurement be different on the same wire?It must be only ... | Is this just "Circuit Wizard" weirdness, OR Another something? | electronics | 2018-05-01T08:27:16.580 |
[
{
"message": "I have to admit I'm a complete newbie with regards to radio frequencies and such ... :-(Thanks to this site I've been able to find out what transceiver is being used in the remote control I'm investigating [<a href=\"https://electronics.stackexchange.com/questions/371061/find-datasheet-for-an-indu... | How to observe the signals of a radio remote control using CubicSDR? | electronics | 2018-05-01T20:44:24.807 |
[
{
"message": "I am designing a headphone amplifier around the IC TL074. I have this circuit so far.<a href=\"https://i.stack.imgur.com/sT7Q9.jpg\" rel=\"nofollow noreferrer\">This circuit is almost good but the sound I see at the output is slightly distorted. I think it has to do with the cross over between the... | Trying to make an amplifier to work | electronics | 2018-05-02T10:54:12.680 |
[
{
"message": "I am designing a headphone amplifier around the IC TL074. I have this circuit so far.<a href=\"https://i.stack.imgur.com/sT7Q9.jpg\" rel=\"nofollow noreferrer\">This circuit is almost good but the sound I see at the output is slightly distorted. I think it has to do with the cross over between the... | Trying to make an amplifier to work | electronics | 2018-05-02T10:54:12.680 |
[
{
"message": "I am designing a headphone amplifier around the IC TL074. I have this circuit so far.<a href=\"https://i.stack.imgur.com/sT7Q9.jpg\" rel=\"nofollow noreferrer\">This circuit is almost good but the sound I see at the output is slightly distorted. I think it has to do with the cross over between the... | Trying to make an amplifier to work | electronics | 2018-05-02T10:54:12.680 |
[
{
"message": "I want to use the IR2133 to drive a mosfet rectifier. I have setup as in the circuit below<a href=\"https://i.stack.imgur.com/ed9ay.jpg\" rel=\"nofollow noreferrer\">The probelm is (take first high side fet as example) that the signal that appears on HO1 is exactly the same as whats on VS1. The ga... | IR2133 Bridge driver not working as expected | electronics | 2018-05-02T12:34:19.887 |
[
{
"message": "What is the maximum input value (Vi) that can be applied without zener diode gets damaged knowing that the maximum power rating of the zener diode is \\$ P_m = 500mW \\$,the breakdown voltage is \\$ V_Z = 10V \\$ and the ripple in the output voltage is +-3% ? Any help is appreciated! Thanks in ad... | Voltage regulator with zener diode | electronics | 2018-05-02T16:16:22.383 |
[
{
"message": "I am building a simple modular synthesizer. I would like to keep everything simple and prefer to use discrete components over integrated circuits. My goal is to improve my knowledge about electronics.How can I amplify a signal which has a DC component (e.g. 1V DC + a sine wave which is 1V peak to ... | Amplify a signal having a DC component without using an opamp | electronics | 2018-05-02T18:12:41.480 |
[
{
"message": "The BA3121 is an audio (ground loop) isolation amplifier. In the datasheet there is no simple pinout picture with names of the pins, so I draw this pinout picture by following the block and the circuit operation diagrams. It takes me some time to do this (i am not an expert).Before I try/continue,... | BA3121 datasheet pin confusion | electronics | 2018-05-03T00:07:28.573 |
[
{
"message": "When I set the horizontal axis to something large (40ms/div or greater) and hit the Single button, the scope triggers immediately, although no trigger event has occurred. I tried the following:Setting the trigger to something ridiculously high and grounding the channel that it triggers on, to make... | Oscilloscope triggers unexpectedly when horizontal scale is large | electronics | 2018-05-03T00:51:50.807 |
[
{
"message": "I made a cooling unit with two peltier(12706) with hot side attached to heatsink with fan. And cold side with waterblock i.e (heatsink + peltier(hot side with heatsink) then waterblock then another peltier (cold side with waterblock) then another peltier + heatsink)When I power the unit the waterb... | Peltier not cooling water | electronics | 2018-05-03T04:51:37.430 |
[
{
"message": "I'm looking for a diode with a specific forward voltage (about 1V) when current is around 150mA (though the max current should be around 250mA or higher).The closest I've come so far is the 1N270 (1V forward voltage around 200mA), and 1N4001 (about 0.7V forward voltage around 150mA). Does anyone k... | Where can I find diodes by forward voltage? | electronics | 2018-05-03T07:02:34.197 |
[
{
"message": "I currently working on a new design that should support Ethernet IEEE1588 PTP. I was looking for Ethernet 1GBit PHYs with IEEE1588 support when I saw this on TI website:<a href=\"http://www.ti.com/interface/ethernet/phy/products.html#p1323=10/100;10/100/1000;100&p2192=IEEE%201588%20PTP;IEEE%20... | Ethernet PHYs IEEE1588 PTP vs SOF | electronics | 2018-05-03T08:34:04.007 |
[
{
"message": "I want to use <code>SN54HC244</code> chips so I started reading the data-sheet.It can be found <a href=\"http://www.ti.com/product/SN54HC244?dcmp=dsproject&hqs=pf\" rel=\"nofollow noreferrer\">here or directly <a href=\"http://www.ti.com/lit/ds/symlink/sn54hc244.pdf\" rel=\"nofollow noreferrer... | How do I read SNx4HC244 logic diagram? | electronics | 2018-05-03T11:50:29.853 |
[
{
"message": "Below is an H bridge inverter circuit model I came across in net:<a href=\"https://i.stack.imgur.com/E19sW.png\" rel=\"nofollow noreferrer\">I'm getting Singular matrix Iteration error when I try to run this.If I delete the circuit on the right things work. Or if I ground the C1's terminal it also... | How to fix this LTspice error | electronics | 2018-05-03T13:09:23.997 |
[
{
"message": "I'm trying to make a buck converter that should carry a load of up to 12A. Probably no surprise, the n-channel mosfet is getting hot quick, even with a heatsink it is getting to hot. (I have currently changed the Q5 to a IRFP1405PBF)I have then tried to parallel two mosfets (with wires). But, It s... | Buck Converter 24V 12A | electronics | 2018-05-03T14:01:51.103 |
[
{
"message": "Are there any temperature sensors which can be interfaced with PLDs without having to implement a SPI/I2C bus at the PLD end. I am looking for something which can be interfaced without having to be involved in the complications of code the receiver part of some protocol.",
"role": "user"
},
... | Interfacing a temperature sensor with PLD without implementing SPI/I2C bus | electronics | 2018-05-03T17:27:09.060 |
[
{
"message": "Before asking the question I want to mention the basic two premises I know: As far as I understand for direction control, H-bridge inverter is used only for a certain type of DC motor not for an AC motor(?). For example a permanent magnet DC motor direction can be controlled just by reversing the... | A question about servo motor direction control | electronics | 2018-05-03T18:21:20.717 |
[
{
"message": "TLDR ATmega4809, mis-labelled ISR in iom4809.h. How can I define an ISR without using these mis-labelled predefined values from iom4809?Using the ATmega4809 Xplained Pro eval board, I'm setting up asynchronous USART transmission, using the data register empty interrupt to always send the next avai... | Atmega4809 Asynchronous USART doesn't trigger data register empty interrupt - iom4809.h error | electronics | 2018-05-03T19:30:05.767 |
[
{
"message": "I speculate this is just barely an EE question, but I'll risk it anyway:I'm replacing a set of 175C 10A thermal fuses (with 172C 10A actually). At this temperature / current range, do we need special high-temp crimps or will any ol' ebay copper crimps do?EDIT: Good comments, some clarifications:a... | Thermal Fuse Crimp material | electronics | 2018-05-03T19:41:07.653 |
[
{
"message": "I am using LTspice to simulate a buck converter, but I am not getting the expected output voltage and I don't understand why. The specification is simple: I need to get an output voltage which is half of the input one. This is the circuit I am using in the simulation:<a href=\"https://i.stack.imgu... | Error in simulation of a DC/DC buck converter using LTspice | electronics | 2018-05-03T20:20:36.120 |
[
{
"message": "At work, we have a remote battery operated magnetic door detector that send a signal to our alarm system whenever we open a door. The battery lifespan is almost a year. I tried to replicate that system at home. I constructed a really simple circuit around the <a href=\"https://learn.sparkfun.com/... | Microcontroller wake-up strategies (ESP8266) | electronics | 2018-05-04T01:03:15.717 |
[
{
"message": "I would like to measure the resistance of a resistor in the most basic way by running a current through it and measuring current and voltage. I understand that I have basically two options to place voltmeter and ammeter:<a href=\"https://i.stack.imgur.com/4DT0g.png\" rel=\"nofollow noreferrer\">If... | Measuring resistance | electronics | 2018-05-04T07:17:04.250 |
[
{
"message": "So, I got my 74190 counter shows number like this 9-8-7-6-5-4-3-2-1-0-5-4-3-2-1-0-5-4-3-2-1-0-5-4-3-2-1-0 and so on.My questions:What can I do to change the output count down into 5-4-3-2-1-0-5-4-3-2-1-0 and so on?When it changes 0 into 5 it moves so fast. How could I fix this one?<a href=\"https:... | 74190 counter problem | electronics | 2018-05-04T09:55:45.877 |
[
{
"message": "I'm designing a small solar charger with these characteristics:SOLAR PANELVoc = 5,65 VVmp = 4,25 V (Voc -25% approx.)Isc = 250 mAIC CHARGER CONTROLLERSTMicroelectronics <a href=\"http://www.st.com/resource/en/datasheet/spv1040.pdf\" rel=\"nofollow noreferrer\">SPV1040 High efficiency solar battery... | Design a Li-Po battery charger with small solar panel and charger controller with embedded MPPT | electronics | 2018-05-04T11:15:59.507 |
[
{
"message": "I'm currently working a project involving the <a href=\"https://www.vishay.com/docs/84276/veml6040.pdf\" rel=\"nofollow noreferrer\">VEML6040 color sensor (<a href=\"https://www.vishay.com/docs/84331/designingveml6040.pdf\" rel=\"nofollow noreferrer\">Link to application note). I am reading throug... | Relative responisivity of the VEML6040 | electronics | 2018-05-04T12:24:09.573 |
[
{
"message": "<a href=\"https://i.stack.imgur.com/TwXMQ.png\" rel=\"nofollow noreferrer\">I would like to do something like this application note:<a href=\"http://www.onsemi.com/pub/Collateral/AND9093-D.PDF\" rel=\"nofollow noreferrer\">http://www.onsemi.com/pub/Collateral/AND9093-D.PDFAnd I'm using this transi... | How to use MOSFET for load switch applications | electronics | 2018-05-04T12:39:29.240 |
[
{
"message": "I'm in the process of planing to make a rather large LED light panel that uses 24v 130w in total. The LED PSU Driver is rated up to 150w and comes with 3 inputs (earth, neutral and live) and 2 outputs positive and negative. The LED strips that I'm using have fairly decent PCB copper thickness but ... | High Current DC LEDS Strips with Aluminium Plate... is grounding advisable? | electronics | 2018-05-04T16:32:54.047 |
[
{
"message": "I have a uC (Arduino Mini) powered from 2xAA battery pack.The Mini display some data on a circuit with a MAX7219 + 2x7segments 4 digits led (a total of 8 numbers).Because it is powered from battery (and for learning) I want to switch off the load totally when Arduino sleeps, and power on only when... | How switch a 3v load high side, from a uC powered from same 3v? | electronics | 2018-05-04T21:36:42.480 |
[
{
"message": "As you know SMD LED Strips can get damn hot and I'm looking at easy ways to reduce the temperature so that the LEDS remain bright for longer. It is my understanding that your typical LED strip will look something like this:<a href=\"/plugins/schematics?image=http%3a%2f%2fi.stack.imgur.com%2flg7yL.... | Does cutting LED strips into smaller strips then wiring with low AWG decrease temperature? | electronics | 2018-05-04T21:49:21.173 |
[
{
"message": "I am using an IRFZ44N MOSFET (n-type) transistor to regulate the current of a Lithium-ion battery, and I'm trying to use the battery to supply power to both the drain and gate of the transistor. My goal is to allow current to flow from drain to source when I apply voltage to the gate (when I attac... | Using a single power source for both the gate and source of my transistor? | electronics | 2018-05-04T23:22:10.087 |
[
{
"message": "I need to measure current over a large range from a few µA up to 2A. The application is sensitive to noise at later calculations with the measured current. My idea is to use different shunt resistors which are bypassed as needed. Has anyone some experience with this situation and has already selec... | Wide range and high precision current measurement | electronics | 2018-05-05T06:59:03.147 |
[
{
"message": "I do wish to add a voltage regulator between a Li-Ion battery pack and a 36V 220W rated mid drive pedalling assist motor with integrated controller. The caps of that controller have a 63V rating.That pedal-assist motor has an unloaded current draw of 0.823A. The motor is (or at least seems to be) ... | How to pick a capacitor to adjust loop compensation caused by reactive load? | electronics | 2018-05-05T07:51:17.793 |
[
{
"message": "for the below circuit I don't quite understand why the output voltage is negative. <a href=\"https://i.stack.imgur.com/059d7.png\" rel=\"nofollow noreferrer\">In the book I read they say:\\$\\ V_{out} = -K R_{L}V_{in}\\$So, why negative sign? Book says \"The negative sign indicatesthat the output ... | Transistor amplification | electronics | 2018-05-05T08:44:29.553 |
[
{
"message": "Case1:If I have three single phase connections with each having its own single phase energy meters And I connect 1kw load on each of these phase continuosly 24/7 for a month.Case2:Now next month instead of three single phase connections I opt for a single three phase connection with a 3 phase ener... | Three 1 phases vs one 3 phase power cost | electronics | 2018-05-05T10:04:38.773 |
[
{
"message": "I want to trigger an interrupt on an ATMEGA328P, when the current of a load is below a certain value.Therefore I designed the following differential amp circuit using an <a href=\"http://www.st.com/resource/en/datasheet/lm358.pdf\" rel=\"nofollow noreferrer\">LM358Below picture shows the LTSpice c... | OPAMP - Current sense - unexpected behavior | electronics | 2018-05-05T15:59:22.117 |
[
{
"message": "Special encoder output scheme?I am testing an <a href=\"https://nl.aliexpress.com/item/5pcs-Audio-Encoder-360-Degree-Rotary-Encoder-EC16-E16-Coding-3Pin-Handle-Long-15MM/32836687442.html?spm=a2g0s.9042311.0.0.RTDfxJ\" rel=\"nofollow noreferrer\">inexpensive encoder and encountered a strange but co... | Quadrature encoder has one synced edge and one phase-shifted edge, is this a special encoding scheme? | electronics | 2018-05-05T19:00:49.960 |
[
{
"message": "So zener diodes in reverse bias apparently only work within a specific current, Is min and Is max which generally have basically the same X value. On the zener diode graph usually lets say Is min is at like 5.6v and Is max is at like 5.61v or something really close. So zener diodes only work withi... | zener diode i-v confusion | electronics | 2018-05-05T21:46:45.540 |
[
{
"message": "Following up on a question I asked some time ago: <a href=\"https://electronics.stackexchange.com/questions/301868/simple-implementation-of-biss-c-interface-for-a-position-encoder\">Simple Implementation of BiSS C interface for a position encoder. I have implemented a simple BiSS master (point to ... | Implementing line propagation delay compensation for BiSS master in software | electronics | 2018-05-05T22:59:06.777 |
[
{
"message": "I am trying to figure out how to remove a tactile switch and replace it will a wire to connect to a larger switch farther away from the PCB.<br>I am having trouble determining how I need to wire this. My thought right now is to remove the switch, solder a wire between where the 1 and 2 pins would ... | Tactile switches | electronics | 2018-05-05T23:16:38.277 |
[
{
"message": "I am trying to generate a reset pulse in order to wake up an ESP8266 device. The ESP8266 supports a \"deep sleep\" function, in which it consumes very little power. However, the only way to wake it up is to reset it (by pulling the reset pin low - the device will restart as soon as the pin goes hi... | Reset pulse generator for ESP8266 | electronics | 2018-05-06T14:40:23.417 |
[
{
"message": "I am trying to generate a reset pulse in order to wake up an ESP8266 device. The ESP8266 supports a \"deep sleep\" function, in which it consumes very little power. However, the only way to wake it up is to reset it (by pulling the reset pin low - the device will restart as soon as the pin goes hi... | Reset pulse generator for ESP8266 | electronics | 2018-05-06T14:40:23.417 |
[
{
"message": "I'm working on a radio module that is made to transmit from a rocket to a ground station for a homemade project. The airframe is made of carbon, therefore I cannot place the antenna(s) inside the rocket (carbon is not RF transparent). However, placing the antenna on the outside of the rocket prove... | Ground Plane for Antenna on Carbon | electronics | 2018-05-06T17:42:55.423 |
[
{
"message": "Why did the dimmer burned the linear transformer? It is a MOT transformer, secondary rewound with 7 turns and a resistive heating element of 800w. While the transformer worked fine at line 220AC, burned while connected to the dimmer(phase angle).<a href=\"https://i.stack.imgur.com/CzHtw.png\" rel=... | Triac dimmer burned transformer as load | electronics | 2018-05-06T19:54:02.537 |
[
{
"message": "<a href=\"https://i.stack.imgur.com/CoRP4.jpg\" rel=\"nofollow noreferrer\">I am learning Differential amplifier, and it has been fun and smooth, but I encounter a problem here. This is a 10x Differential Amplifier setup, and the voltage drop across R5 (0.01 ohm) is 5mv, so the output should be 50... | Differential amplifier op amp problem | electronics | 2018-05-07T01:56:41.560 |
[
{
"message": "I have purchased some USB-C connectors that I use to build my own cables with (I have separate \"host\" and \"device\" side connectors for various cable assemblies), and I was wondering how I might go about testing the resistor on the little PCB to ensure it is correct and to spec? Any best practi... | How can I test the resistor on my USB connector? | electronics | 2018-05-07T04:27:29.610 |
[
{
"message": "I am trying to plan a low pass filter as in the picture:<a href=\"https://i.stack.imgur.com/OKR91.png\" rel=\"nofollow noreferrer\">I use it to create an ON/OFF lag (Is this the correct term?)I have calculated the time constant τ of the system:My question is:How do I calculate the time constan... | Low pas filter time constant for a square input | electronics | 2018-05-07T09:39:08.857 |
[
{
"message": "I've been trying to analyze the following circuit using whatever books and resources I have to hand:<a href=\"/plugins/schematics?image=http%3a%2f%2fi.stack.imgur.com%2fLEU61.png\">simulate this circuit – Schematic created using <a href=\"https://www.circuitlab.com/\" rel=\"nofollow\">Circui... | Calculating the transresistance in a multistage voltage-shunt(shunt-shunt) feedback amplifier | electronics | 2018-05-07T10:26:59.700 |
[
{
"message": "In my project I have connected multiple sensor breakout boards to a Arduino-proMIni running at 3.3V and 8Mhz as follows on a fabricated pcb but preserving the original board layouts (so that I can connect them via traces instead of loose wires)<a href=\"https://i.stack.imgur.com/T2llL.png\" rel=\"... | how to choose the right pullup resistances for i2c lines with multiple slaves | electronics | 2018-05-07T11:21:50.717 |
[
{
"message": "I have been researching various ways to control DC fans and out of curiosity bought a fan that has a 4-position switch with off, low, medium, and high settings. I thought that a voltage divider should not be used as a power supply.I drew the schematic for it (2 surface mount resistors and 4 positi... | Voltage Divider For DC Fan | electronics | 2018-05-07T18:35:58.103 |
[
{
"message": "i am new here. First of all I am sorry for my bad english. I want a help from those who know about nichrome heater coil. I want to make a 12v dc incubator using nichrome wire as heating element, all I need is to produce almost 40 degree celsius in my styrofoam box. For this, how much length nichro... | 12 v watt heater with nichrome coil | electronics | 2018-05-08T09:48:39.390 |
[
{
"message": "<a href=\"/plugins/schematics?image=http%3a%2f%2fi.stack.imgur.com%2f4nbG4.png\">simulate this circuit – Schematic created using <a href=\"https://www.circuitlab.com/\" rel=\"nofollow\">CircuitLabI have a low current current circuit and I would like to be able to measure the voltage on one p... | Isolation between measuring voltage from low current circuit? | electronics | 2018-05-08T13:23:30.197 |
[
{
"message": "I started working with the LT1990 Differentiel amplifier.In the datasheet, it's stated that it needs a 1.25V voltage reference.I made some research and I found the TLVH431 Low-voltage adjustable precision shunt regulators but I didn't understand how it works and how from an input voltage I can hav... | Voltage reference TLVH431 | electronics | 2018-05-08T14:16:41.600 |
[
{
"message": "Update: I've removed all irrelevant information and simplified the question.The <a href=\"http://www.ti.com/lit/ds/symlink/opa548.pdf\" rel=\"nofollow noreferrer\">OPA548 operational amplifier provides adjustable current limit that can be controlled digitally with a current-out DAC. Below is a cir... | Current limiting with optocoupler | electronics | 2018-05-08T15:55:56.067 |
[
{
"message": "Update: I've removed all irrelevant information and simplified the question.The <a href=\"http://www.ti.com/lit/ds/symlink/opa548.pdf\" rel=\"nofollow noreferrer\">OPA548 operational amplifier provides adjustable current limit that can be controlled digitally with a current-out DAC. Below is a cir... | Current limiting with optocoupler | electronics | 2018-05-08T15:55:56.067 |
[
{
"message": "I have a quick questions: can I safely power a LED with 3.3v without a resistor? I have some LEDs that I typically power with 5v and a 220Ω resistor, but I can only supply 3.3v at the moment.Additionally I have push-buttons that I typically pull-down with 10kΩ resistors when using 5v. What resisto... | Resistor requirement for 3.3v | electronics | 2018-05-08T16:35:22.850 |
[
{
"message": "I have hooked up the following circuit: Also, is there any possibility to create a link for the schematic? After posting it I realized it´s too small to be seen but I don´t know how to fix it.<a href=\"/plugins/schematics?image=http%3a%2f%2fi.stack.imgur.com%2f6Berd.png\">simulate this circuit &nd... | Capacitor weird behavior | electronics | 2018-05-08T23:28:50.743 |
[
{
"message": "I am trying to integrate a <a href=\"https://www.waveshare.com/wiki/2.9inch_e-Paper_Module\" rel=\"nofollow noreferrer\">Waveshare e-paper display into my design using their published <a href=\"https://www.waveshare.com/w/upload/8/85/2.9inch_e-Paper_Schematic.pdf\" rel=\"nofollow noreferrer\">sche... | Selecting an inductor based on schematic | electronics | 2018-05-09T02:43:04.857 |
[
{
"message": "I am planning to shoot a video under Infrared light and want to choose a ton of the right size so that the entire room is illuminated. I am on to build a separate circuit if need be for better visibility. Please suggest",
"role": "user"
},
{
"message": "If you want a spotlight with +-2... | What is the maximum lumens an Infrared LED can dissipate? | electronics | 2018-05-09T04:50:37.280 |
[
{
"message": "<a href=\"https://i.stack.imgur.com/csB7J.png\" rel=\"nofollow noreferrer\">Hello, above screenshot depicts output configuration in one of STM32 microcontroller. I would like to examine it a bit to understand what is going on and what I can expect.First of all the manual says we can confugure outp... | Microcontroller output configuration | electronics | 2018-05-09T17:58:19.827 |
[
{
"message": "I have to design a current generator (schematics in figure) which gives as output about \\$10\\ \\text{mA}\\$ if it receives as input \\$5\\ \\text V\\$. I have to choose the resistances \\$(R_1, R_2, R_3, R_4, R_5)\\$ which allow me to get this output.<a href=\"https://i.stack.imgur.com/s9tFg.png... | How to choose the resistances for this current generator? | electronics | 2018-05-09T18:10:44.917 |
[
{
"message": "I have a possible project coming up that looks like it needs a small amount of digital logic (to generate some synchronous timing/control signals). Speed is not that high, in the low megahertz.My background is a wide mix of analogue/low speed control/embedded microcontrollers and also application ... | Low risk entry into CPLD/FPGA design? | electronics | 2018-05-09T21:46:52.607 |
[
{
"message": "I'm using a <a href=\"https://www.adafruit.com/product/815\" rel=\"nofollow noreferrer\">Adafruit Servo Driver (PCA9685) and I have to solder a capacitor depending of the number of servos.<blockquote> We have a spot on the PCB for soldering in an electrolytic capacitor. Based on your usage, you m... | What happens when I use a bigger capacitor? | electronics | 2018-05-10T05:17:46.473 |
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