Re: [TCML] re: ignition coil pulse generator

[DC Cox <resonance@xxxxxxxxxxxx>]

I also have a triac version of the ignition coil driver.  It produces 60 kV
when used with an Accel Super Coil ($45 at jegs.com).

Contact me off-list if you want the circuit.  I use it to trigger the first
stage of our Marx impulse generator.

Dr. Resonance





On Wed, Sep 2, 2009 at 3:28 PM, G Hunter <dogbrain_39560@xxxxxxxxx> wrote:

> Capacitive discharge is a common way to fire an ignition coil.  In this
> scheme, an audio frequency inverter steps 12vdc up to 400vdc or so and
> stores it in a capacitor.  This capacitor periodically dumps its charge into
> the coil primary (usually by a thyristor switch), giving 10's of kv
> discharge on the secondary.
>
> If simplicity is what you're after, a car ignition coil can be pulsed from
> a regular 120vac outlet using an electronic lamp dimmer and a series
> capacitor to limit the current.
>
> http://myweb.cableone.net/grcarhunter/cararc.htm
>
> A 400-600v motor run cap of 2 to 10uF works well for this duty.  If
> discharged through a spark gap, this setup gives a continuous flaming arc
> output, like an NST.  I ran a circuit like this as an electric fence charger
> 24/7 back when I had a big vegetable garden.  I only saw it tested once,
> when my poor bulldog sniffed at the live wire.  She never did that again!
>  Let's just say it made a lasting impression on her.  Oh yeah, it kept the
> bunnies away from my zucchini, too.
>
> Cheers,
>
> Greg
>
> --- On Wed, 9/2/09, Dr. John W. Gudenas <comsciprof@xxxxxxxxxxxxx> wrote:
>
> > From: Dr. John W. Gudenas <comsciprof@xxxxxxxxxxxxx>
> > Subject: Re: [TCML] re: ignition coil pulse generator
> > To: "Tesla Coil Mailing List" <tesla@xxxxxxxxxx>
> > Date: Wednesday, September 2, 2009, 3:23 PM
> > While all my work now is with VTTC
> > and DRSSTC coils, I have run enough
> > cars on the drag strip to suggest you believe it.
> > I have seen racers go into cardiac arrest by getting a HV
> > and high
> > current shock from MSD ignition systems.
> >
> >   Treat those coils with respect.
> > John
> >
> > John W. Gudenas, Ph.D.
> > Professor of Computer Science
> >
> > On Sep 2, 2009, at 2:48 PM, Rhys Sage wrote:
> >
> > > I was in o' Reilys the other day and they had coils
> > which they
> > > claimed produced 55kv, 18kv, 30kv etc.
> > >
> > > Rhys Sage
> > >
> > >
> > >
> > > SagePhotoWorld.com
> > >
> > >
> > >
> > > America's favorite photographer.
> > >
> > >
> > >
> > > _______________________________________________
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> >
> >
> >
> >
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>
>
>
>
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