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BrianG · 01.12.2011, 10:57 PM

Those look like high output white LEDs which I assume is for "headlights", so they need to have ~20mA or more for that use. IIRC, typical white high brightness LEDs have a Vf of a little higher than 3v. So, on 6v, they shouldn't be driven enough to technically need a resistor, but obviously something is wrong.

If anything, I'd re-wire them up so instead of 2s2p, they are 1s4p. And then use the 100-150 ohm resistor for each LED. You could use a single common resistor for all LEDs in parallel, but that's not advised.

	(#1)
BrianG RC-Monster Admin Offline Posts: 14,609 Join Date: Nov 2005 Location: Des Moines, IA	01.12.2011, 10:57 PM Those look like high output white LEDs which I assume is for "headlights", so they need to have ~20mA or more for that use. IIRC, typical white high brightness LEDs have a Vf of a little higher than 3v. So, on 6v, they shouldn't be driven enough to technically need a resistor, but obviously something is wrong. If anything, I'd re-wire them up so instead of 2s2p, they are 1s4p. And then use the 100-150 ohm resistor for each LED. You could use a single common resistor for all LEDs in parallel, but that's not advised.