Originally posted by Hoppy
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Interesting that you could get it working Lid with the CFL looped back into the ignition coil. I only got it to work when the globes were off 1 wire. And removing the second coil ceased the oscillations. Hoppy, I saw the same thing. Low amp draw is all good and well but if there is little illumination what is the point. I could get it really low, but the light was dim too.
@ Mutten. If you look inside the h11d1's package you will note there is a small npn transistor there. This is hooked up in a darlington configuration to my 2n3055. The base is triggered by the opto switch, which is on the other side. This is connected to my PWM. The PWM wasnt used in my above schematic, hence there is no triggering of the h11d1 conventionally.
Nat 1920 ?? Another posting maybe?

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