O2 sensor question

[Chad]

The new model Cadillac Catera uses a wide band O2 sensor.  This particular
sensor needs a fairly sophisticated control loop to make it work though (I
haven't worked with many others yet).  I've seen it done analog, a bosch unit
we had in used opamps, but we decided to go digital.  We used a microcontroller
to control the heater (it has to be the right temperature to be accurate),
check the O2 level, and communicate with the A/F display (in our case, a PC).

chad

>Haven't investigated sensors yet, I was hoping to find one that came with a
>spec so I could see what the output curve is, then read with an ADC and
>micro, display on a little LCD. Do you know of a low cost source for these
>wideband sensors?
>
>dave
>


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