[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: 555 timer driver for ignition coil
Tesla list wrote:
> Original poster: "B Marshall" <bm-at-bens-stuff.fsnet.co.uk>
> I've also messed about with a similar circuit, which used a couple of
> transistors as an osc to
> pulse a 2n3055. This was used to drive an ignition coil. I had no problems
> with it, until I
> connected it up to a variac and put about 15v in (not sure of current, but
> the spark would ignite
> paper) which blew the 3055.
The 2N3055 is a lousy transistor for this form of a coil driver, due to
the low collector-emitter breakdown voltage. I would use a transistor
rated at at least 600 volts or more as the power switch.