Re: Terry's GM HEI Coil

• To: tesla-at-pupman-dot-com
• Subject: Re: Terry's GM HEI Coil
• From: Jim Lux <jimlux-at-jpl.nasa.gov> (by way of Terry Fritz <terryf-at-verinet-dot-com>)
• Date: Fri, 20 Nov 1998 23:28:36 -0700
• Approved: terryf-at-verinet-dot-com

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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