Here is something that may be of interest to some of you.

Ken and I have exchanged notes on our interest in electronic fuel monitoring
gadgets for the aircraft rotary.  Here is his interesting employment of the
LOG version of the LED indictor, to give a more linear response curve of the
O2 sensor.  As Ken indicated you are free to use this to build your own or
contact him for a printed circuit board (don't know the cost, but probably
well worth it).

Ed
Ed Anderson
RV-6A N494BW Rotary Powered
Matthews, NC