Photo switch / transistor - any suggestions?

cjdelphi:
Ahh, you wish the LED's to stay on and not fade out?...

Good question, some kind of Latch then :slight_smile: - probably require an IC of some kind to remember the state, someone else can probably explain how that works, all i can think of is a Latching IC, not sure how'd you do it with basic circuit components.

because as soon as the light level drops, the cap will slowly discharge making your LED's dimmer, you'd need a latch to stay delivering current until some kind of user input?

Yeah, exactly. I was hoping to essentially have some sort of photo transistor. Like, as soon as enough energy is put into the photocell, it opens the "flood gates" and allows the 3.7V to flow continuously. And, if it could fade on, that would have been ideal too. Don't know if it's possible, or how many components I'd need to make it possible. Just wanted to see if anyone had a simple solution for it. :slight_smile: Thanks for all of your tips though. :smiley: