17-01-13, 12:27 AM
(17-01-13, 12:20 AM)Fazerider link Wrote: Neat job. Admittedly I'm under the influence, but doesn't 1Ω and six diodes in series mean the current for each chain is only really being limited by the forward voltage drop of the diodes?
Technically yes, but the LEDS have a high forward current of 100ma so they require a fair bit of current (As they are so bright). I initally designed the circuit for 13.5v with 15 ohm resistors, but after adding the diodes etc and measuring the volt drop I ended up dropping them to 1 ohm for 12v.
I used an LED array calculator to help with the maths.