wrote in :

On 11 Jun 2017 17:54:14 GMT, Puckdropper
puckdropper(at)yahoo(dot)com wrote:
Well, I just tried it. Yes, I know--but sometimes you gotta pee on the
electric fence for yourself. No LED worked at all. I didn't bother
metering the resistors, I probably should have.

Resistors will take quite a lot of punishment but it might be
worthwhile checking them too. Any silicon devices will be far more
sensitive than the resistors. You might check connections, too (to
see if the soldering worked at all).

Argh... My test bed failed. I've got a useful little thing that's a 9V
battery holder with a 1k resistor soldered to it. Unfortunately, the
crimp failed and was inconsistently passing power.

I only had 6 poorly soldered LEDs out of 24, and after fixing them they
all light!

Moral of the story (and why I'm posting):
Occasionally verify your test equipment works properly!

*trim*

Puckdropper
--
http://www.puckdroppersplace.us/rec.woodworking
A mini archive of some of rec.woodworking's best and worst!