I have this kit https://www.amazon.ca/gp/product/B07GRYNV6F/ref=ppx_yo_dt_b_asin_title_o02_s00?ie=UTF8&psc=1
soldered everything correctly (checked multiple times, the right element in the right place, the polarities etc)
One LED though acts strangely. When I solder it (correct polarity) it doesn't work. The multi meter connected directly to the two pins (not the solder points, directly to the LED legs) shows a dead LED. However when removed from the circuit, i can confirm with multi-meter that it is good and it lights up.
It is probably a very basic think that i am missing, but i am unable to figure it out. and sorry if I am wasting your time.
any hints on what I could verify or can anyone think of an explanation of why is this happening.
appreciate in advance any help
thanks
Best Answer
When something doesn't work in a circuit, it is time to do some checks. By what you say, you have tested the LED to be working when it is outside of the circuit, which means that then next thing to check is if there is any voltage driving the LED.
With the LED in the circuit measure the voltage at its pins. If the voltage is 0V, then it has to be something with the wiring (or maybe it is not meant to be always on).
A bad connection is quite often the culprit to many headaches.