Questions tagged [detection]
The detection tag has no summary.
260 questions
2 votes
2 answers
138 views
Will PC817 be able to handle inrush current on startup in capacitive dropper circuit for mains detection?
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 ...
- 907
2 votes
1 answer
95 views
Detecting disconnected ground potential
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 ...
- 85
-1 votes
1 answer
69 views
Signal detection timing issue
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....
- 109
1 vote
0 answers
124 views
How do i trick a Powerbank for detection of USB?
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 ...
- 21
4 votes
3 answers
628 views
Relay contact welding detection with opto-coupler (both on line and neutral)
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 ...
- 41
2 votes
1 answer
232 views
detecting a wire cut in the car
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 ...
- 21
1 vote
2 answers
124 views
Detection system for specific material
I'm looking for some ideas on how to detect some kind of material/tag that can be electrically distinguished amongst organic material, wood and iron. Such material/tag should be possible to detect ...
- 11
1 vote
1 answer
238 views
How can I visualize 24 GHz RF on a screen?
Is there a (preferably inexpensive) way to visualize/image 24 GHz RF from a radar gun (of the type used to check baseball speeds) on a screen? Here are some examples of what I mean, for other ...
- 189