Re: Terry's GM HEI Coil

• To: tesla-at-pupman-dot-com
• Subject: Re: Terry's GM HEI Coil
• From: "James" <elgersmad-at-email.msn-dot-com> (by way of Terry Fritz <terryf-at-verinet-dot-com>)
• Date: Sat, 21 Nov 1998 06:51:13 -0700
• Approved: terryf-at-verinet-dot-com

    In my circuits I uses surge protectors, and my transistors don't need to
handle more than whatever.  I  can just use to heavy Zeners in series
oposing eachother's polarity, and MOSFETs because they can be driven by
op-amps, and put out 5 or 6 amps each.  I can run them in series, and it
don't matter, or in parallel, and they don't care.  I might need one to
drive a few off of an op-amp though, but that one won't even get warm.

James.



>Original Poster: Jim Lux <jimlux-at-jpl.nasa.gov>
>
>Tesla List wrote:
>>
>  We don't actually need a spark gap, just a timed closure.  Or
>> better yet, anyone know what cars use nowadays as far as solid-state
>> points?
>
>For classic electronic ignition, they use an NPN Darlington Transistor,
>typically. BVceo of 450V, If of 5A, etc.
>
>For a capacitive discharge, they use an inverter to charge a 1 uF cap to
>400 V, and use an SCR to discharge it through the primary.
>
>Now there's a triggered gap!
>>
>> Gary Lau
>> Waltham, MA USA
>
>--
>Jim Lux                               Jet Propulsion Laboratory
>ofc: 818/354-2075     114-B16         Mail Stop 161-213
>lab: 818/354-2954     161-110         4800 Oak Grove Drive
>fax: 818/393-6875                     Pasadena CA 91109
>
>

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