PIC driven UEGO

[The Punisher]

I have been working on PIC driven O2 meters for a while now and I see that 
the EGOR schematic has been posted.
I would realy like to update My design to use A UEGO instead of the HEGO I 
have been using. The Schematic and Excel documents are great, but I would 
like some more info on what it takes to drive the sensor. I would like to 
try to reduce the hardware requirement and do more with software.

My current project is a PIC based O2 meter that collects the voltage from 
the HEGO (12 bit),corrects the output curve through a lookup table, and do 
some some basic math. Then the AFR (aprox, but consistent) is displayed 
numericly and graphicly on a 2x20 LCD (also have a 2x40 version).
The display on this device looks awesome, and this kicks butt on all the led 
AFR meters I have seen. The bargraph is 100 pixels wide (200 on the 40 char) 
and is relative to AFR# NOT just voltage. I also display the millivolt level 
on the bottom with the AFR number. My design would easly expand to allow 
multiple sensor readout and dataloging/replay.

I think this would work great with a UEGO. ANY information would help alot.

Marvin Fugate (The Punisher)
punisher454 at hotmail.com
67 Pro-Street Camaro 427 BBC
84 S-10 406 SBC
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