Quote:
Originally Posted by joeo
Andy - my guess is it's back EMF from the solenoid that's burning out the LED. I think a diode needs to be used to prevent it. Need to google, cuz I'm having the same issue with a different solenoid project.
-Joe
|
Hmmm. Feeling kinda dumb now. I have an electronics background and I now recall a topic called "inductive kick". It may need a discharge circuit. Thx for the note!
And found this discussion with a quick google search...
https://electronics.stackexchange.co...d-as-indicator