ecu7

[Al Lipper]

Richard, 
	Thanks for checking out the schematic.  So far we haven't had real noise
problems on those signals, but I'm forwarding your note to John
(john at g8stw.demon.co.uk) who is doing the schematic revision, and who has
more experience in this area than I do.  If we get things going quickly
with the PC board layout, you may not need to even bother with the wire wrap!

If you're interested in working on the keypad/display section, I can give
you the specs on a 4-line x 16 char. display that I was thinking we could
use (they're under $20 surplus).  The key is that it should interface to
the '552's I2C bus.  I'm not familiar with the bus, however, so you would
end up being the expert in this field.  If you would rather work on a
different area, just let me know (for example, an ignition control is a
possibility for the future.  Thanks.

			Al


At 06:22 AM 2/6/99 -0800, you wrote:
>Al I read your last e-mail.  good looking drawing!
>I am wondering if we should look into any further
>signal conditioning on the i/o pins.  My experiences
>with the Intel 80c51 series of up's tells me that
>they can be VERY suseptable to noise pickup. I think
>that the automotive environment is like using an
>AM radio in a thunderstorm!  
>Tell me more about what you would like me to help you
>with.  I have already started collecting parts to
>build a prototype of this.  I will probably use wire wrap. It should
>be ok if I watch my lead dressing.
>
>cul
>rhq
>
>
>
>
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