As the long suffering owner of a DIY JAW wideband lambda sensor controller for my carburetored 1978 Austin Mini, I got around to thinking that the Arduino board could be used to do the same job but better? It would need to monitor and control the heating of the sensor dynamically as well as delivering the output from it as three LEDs YELLOW (rich) /GREEN (ok) /RED (lean) and a display of lambda / AFR
for the system
Gives you a schematic of the setup, the heater circuit is about 1 amp, I don't really understand all the complexities
Any thoughts???? I am not a programmer but can build an engine from a box of bits!
This could be a useful project for any school involved in automotive projects as the source 5 wire lambda sensor is from a VW Golf and costs 30-40 UKP plus the cost of welding a mounting in the exhaust
NOTE I am not running an injection system from the AFR/Lambda output, simply monitoring the state of tune of a carburetor based system.
Lambda sensor? see: http://en.wikipedia.org/wiki/Oxygen_sensor