Stamp EFI

[Steve Baldwin]

> >I have read a thread today that looks like ths start of an 
> >possible EFI project using a basic stamp.

> can a few people have a look at this and tell me if it's worth trying?

Anything is worth trying if you get some enjoyment out of doing it.

The biggest problem with the Stamp is that it can only do one thing 
at a time (and fairly slowly). An engine isn't that forgiving. You've 
off-loaded some of the work from the Stamp on the input side but I 
would suggest you try and remove the 'real time' aspect from the 
outputs.

If you take a mixture of your drawing and Ray's analog suggestions, 
you are probably a long way there. Using an ignition event as a 
trigger and a ramped input to a comparator to determine the on time 
of the injector means that it can look after itself without taking 
any resources from the Stamp. You can then use the Stamp to do the 
thinking and apply mixture adjustments to the analog part with a D/A.

Just thought fodder.

Steve.

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Steve Baldwin                Electronic Product Design
TLA Microsystems Ltd         Microcontroller Specialists
PO Box 15-680, New Lynn      http://www.tla.co.nz
Auckland, New Zealand        ph  +64 9 820-2221
email: steveb at tla.co.nz      fax +64 9 820-1929
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