led question

i just ordered 20 3.5 volt leds off ebay. if i have four of them in a series circuit, do i need resistors? what about if i run them in parallel?

thanks

put them in series and you're fine.

Don't put them in parallel w/out resistors.

if i have a lot more than four, are they a lot dimmer?

if you continue to series them, yes, they will continue to get dimmer and dimmer. Just do them in groups of 4.

Hey Brandon, does the amount of wire in between each LED matter when done in a series of 4?

the longer the wire, the more resistance in the circuit, but the differnence in infinitely small, since the wire itself has such small resistance

You'd need a couple hundred feet of wire to see the slightest dimming.