Digital Distributorless ignition q's

[Sandy]

At 03:13 PM 3/2/98 +0100, you wrote:
>Hi guys.
>
>I'm planning on building a ddi for a chevy V-8. My questions are:
>
>1. could i make a cranktrigger using a wheel with 4 holes where the light
>can come through (light sensor input) and make one hole the double length to
>see where no.1 cylinder hangs out. I think with a light-based system you
>won't have much noise in your signal and the output is very consistent. Any
>input ?
If it is in an enclosed place like a distributer, should be fine, but if
not, dirt will get the best of this system.