snips....

I'm quite happy with 8 bit accuracy (1% or so). Do you really need more for engine
monitoring? I haven't even bothered with calibrating my sensors (mostly because I don't
have the proper equipment) and use the nominal offsets and factors listed in the
pressure sensor datasheets.

Please realize that my set-up is very specialized. These are the parameters I display:
Oil pressure
Water pressure
Fuel pressure 1
Fuel pressure 2
Water temp
Oil temp before cooler
Oil temp after cooler
EGT 1
EGT 2

RPM (5 RPM resolution, from 12 pulses/rotation crank angle sensor coil)
MAP
Mixture (using an oxygen sensor)
Voltage
Left tank level (gallons) (home brewed capacitive sensors).
Right tank level (gallons)
Fuel flow
Fuel used

It's also so primitive that I have to burn a new EPROM if I want to change limits,
offsets or factors.

But you know: it works for me. Thus I have very little incentive to develop something
for production unless I have a guaranteed market.

Finn

Sounds good to me Finn. It would make a good article. Send me all the stuff
in crude form and I will work something up and submit it to EAA under
your name. I promise not to laugh at your code. I don't care how good
a programmer someone is. Code can ALWAYS be improved.

The article would be a good start for someone.

snips..

I forgot. Is your LCD a four bit interface or an eight bit interface?

It's 8 bit. The Optrex/Seiko 20 char by 4 lines.

Finn

Thanks Finn. That makes it easier to interface to a 8 bit wide Flash memory
chip. Do you send out just ASCII numbers 30H to 39H or
other ASCII characters?  No matter. It will just take a larger Flash memory chip. 
Long story.

Paul Lamar
 
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