Hi, I want to make a simple LED circuit with 12 LEDs running off a nine volt battery. I've managed to dig up enough information about most things, so I know I'll have to wire them in parallel. But the resistance I should be using still confuses me. Should I have one (or more) resistors at the beginning of the circuit? Or one before each LED in the circuit?
The LEDs I'm using have a 3.6v voltage drop, and they are supposed to get 20mA I beleive. So that's 12 LEDs off a 9v battery.
I have a bunch of 27 Ohm resistors because that's what I (probably mistakenly) calculated I should have before each LED. But I have no idea what i'm doing. So if anyone can help me out on what resistors I should use and where I should put them that would be greatly appreciated!
Thanks, Steve