Re: O2 Sensor monitors

[steveb@newkla.kla.com (Steven Buchholz)]

You are right Scott ... there really isn't that much to making an O2 sensor
monitor display.  I haven't checked lately, but National Semiconductor used 
to make an IC that would drive a bar-graph display based on an analog input 
level.  Add an appropriate high-impedance input amplifier and something to 
give you the desired scale-factor and you're done.  There is some value to 
the reduction of this to practice however.  I don't know that I care that 
much about having an O2 readout on my dash though.  If only SunPro would 
have built that function into their hand-held auto meter.  

Glen, it sounds like you may have one of these doo-dads in your car.  What
sort of things do you notice while you drive?

Steve Buchholz
s_buchho@kla.com