All Questions
6
questions
0
votes
1
answer
172
views
How would I test forward voltage?
I tried to test an LED but my multimeter only displays 0L. Does anybody know what to do if it doesn’t have a select button?
1
vote
2
answers
130
views
LED check circuit on startup
I wanted to use a sensor which should indicate low fluid level with a LED.
I don’t want to have a non working LED in that circuit and want it to be automatically checked everytime the circuit powers ...
- 121
0
votes
2
answers
385
views
led analyser for pcb functional test [closed]
i'm supposed to work on a project that consists on creating a led analyser to test PCB (functional test)
they want me to create a system that can measure the color (R,G,B) and the luminous intensity ...
8
votes
9
answers
20k
views
Large difference between specced values and real values for LED strips?
Recently I bought some "300LED/5meter Waterproof 5630 SMD LED Flexable Strip" i.e. High brightness LED strips from China. In the specifications, it was said that the strip consumes 75W @ 12v, which ...
- 191
8
votes
4
answers
46k
views
How to find a faulty bulb in a Christmas lights string
I have a LED Christmas lights string, which consists of two circuits of LEDs connected serially. It is working directly on 110V AC. Most LED sockets have 2 wires connected to them, some have three. ...
- 213
2
votes
3
answers
7k
views
How to non-destructively test unknown LED strip?
I have a tiny LED strip that I took out of a smashed LCD in my Digital camera. I remember lighting up the strip in the past but can't remember how.
I have been trying now with my bench supply to ...
- 228