Chris Eddy wrote:
>
> cares?  It was there on the ignition already..  If you see a slow decay, you
> might just omit the capacitor, or put a much lower value in it's place.  When
> the points close, that diode holds the charge on the cap, which has to bleed

The cap is there to provide a small amount of points debounce to the
circuit. This can be omitted, and software can do the debouncing.

I've used 800uS as a debounce constant in PIC software and have had no
problems thus far. Assuming a V8 upto about 7000RPM, about 37% of duty
cycle.

--
Best regards

Tony

'The Engine' - Design your own programmer.

http://www.picnpoke.com
Email picnpoke@cdi.com.au