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Electrical Engineering

Questions tagged [detection]

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264 questions
Newest Active Bountied Unanswered
4 votes
5 answers
686 views

Is there a DIY way to measure a direct lightning strike without also bringing the strike (or at least a surge) to the measuring device? I have a rural property with a small mountain on it, and it is ...
Malvineous's user avatar
  • 1,875
1 vote
1 answer
90 views

I am looking for a solution to the following problem: I have a PCB which uses AO3400A MOSFET to switch 24V valves ON/OFF via a GPIO from an ESP32. I have no control over the kinds of valves that are ...
Nils's user avatar
  • 11
3 votes
6 answers
707 views

I'm designing a connector mating circuit as shown in the figure below. The connector will be inserted at the HVIL+ & HVIL- terminals. When the connector is not inserted the op-amp output will be ...
user641035's user avatar
  • 145
2 votes
2 answers
461 views

I need to detect when a 24V pump turns on. I've decided to do this using an optocoupler. Could you please tell me if my circuit is correct?
Sem's user avatar
  • 71
2 votes
2 answers
163 views

There is an one watt 1K resistor in between the broken terminals. I could not show it because not able to find the part number. The unpolarized capacitor is 100 nF and X2 rated. The circuit will be ...
Sayan's user avatar
  • 925
4 votes
1 answer
243 views

I am needing to create a circuit that branches off from my audio path, detects either the peaks or the envelope of the audio signal, and feed those DC values to the ADC of my MCU. I am reaching ...
Colton Seegmiller's user avatar
  • 93
2 votes
1 answer
112 views

I need help to design a circuit that will detect if one of several GND connections break. I am working on a PCB for an industrial application where I am designing an add-on module for an external ...
mjuels's user avatar
  • 85
1 vote
0 answers
55 views

I'm building a circuit to measure current. The main idea is to use a current transformer (CT) to step down the current and then measure it using three different op-amps with different gain levels, ...
kagoun's user avatar
  • 21
-1 votes
1 answer
71 views

I'm trying to design a circuit that would detect an AC signal from my old analog intercom ringer and create a 1second pulse upon detection and feed it towards a relay and/or a GPIO on ESP32 or similar....
von_saiko's user avatar
  • 109
0 votes
1 answer
109 views

I want to use a Raspberry Pi to detect if a switch in a 24V circuit is closed an thus current is flowing in the circuit. The device that should be enabled by pressing the switch is an electromagnet ...
Mathias's user avatar
  • 111
1 vote
0 answers
142 views

I builtd and LED light panel that uses LED strips. Currently using 2 wire USB cable to power it via Powerbank. Currently you need to turn the powerbank on and then it provides power to the LED when ...
j d's user avatar
  • 21
0 votes
3 answers
167 views

I'm trying to communicate with a device that encodes information in the timing/presence of its current consumption: when it wants to send information, it causes 100ns, 40mA current spikes to happen (...
redfast00's user avatar
  • 117
4 votes
3 answers
699 views

The relay switches both the line and neutral, and I need to detect if one of the contacts are welded. I've made this circuit, but if a load is connected, a small current flows through the diodes and ...
germitron's user avatar
  • 41
2 votes
1 answer
199 views

I like to detect the reflection or the red dot of a laser which sends a RC5 protocol command on a 38 kHz carrier. Basically it’s exactly what the above mentioned receiver does for IR signals. But it’s ...
Chris M.'s user avatar
  • 23
2 votes
1 answer
254 views

I have been assigned the task of detecting a wire cut in the car. It's part of my official project. I am a computer science engineer so my knowledge of electronic is bit limited so please bear with my ...
Alan Hopes's user avatar
  • 21

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