29-10-12, 11:40 AM
I was wondering if someone here could help me out. I need to wire 4 leds to run off a normal household battery (eg 9v rectangle one, or something like that) with an on/off switch and as i have never really done something like this before i thought id get some advice so i do it right. Ive done a quick diagram to show what i was thinking but i have a few questions:
What size/voltage battery?
What gauge wire?
What resistors?
Also can i use any switch? The one i like is an on/off 12v toggle switch
Just wanted to add that the LEDs spec is: Forward voltage 3.2 - 3.6 Forward current 20 - 30
Thanks