RST Engineering wrote:
I don't mean to be pedantic, but you can't "transform" a DC voltage;
transformers only work on AC. Do they use a center tap on the battery or a
regulator? If they use a regulator, it had damned well better be a hefty
one to take the slug of current that a cigarette lighter draws.

Jim


Only if it is indeed a cigarette lighter and not just a cylindrical 12V
power outlet. My plane has the latter (it just has a plastic cap on
it). I would blow the breaker if I tried to stick a cigarette lighter
in there.