Re: Exhaust Gas Analyzers

[cak@dimebank.com (Chris Kantarjiev)]

I've had it on my list to build one for a couple of years. The EGOs
cost about $35; the parts for the box are probably $10-20. 
There's a schematic under

        http://efi332.eng.ohio-state.edu/diy_efi/projects/projects.html

that looks pretty straightforward. 

My impression of the EGO output is that the commercial units that give you
30 LEDs worth of resolution are mostly overkill. The peak in the
middle of the EGO's range is *very* sharp, and a 10-segment LED
display should be plenty.