DIY WB Heater Ramp Up at low voltage

[rr]

Yes it does. I actually do the pre-warmup myself. This allows for
the DIY-WB to then come active within a few seconds of startup.
Power up the DIY-WB for 45 to 60 seconds, start the engine,
and have a usable O2 reading within seconds.

BobR.


Perry, Scott wrote:

> I know, based on posts I've seen in the past, that the DIY WB requires about 14V+ in order to work properly.  At lower voltages, (say ~12.5V) does the heater circuit still attempt to heat the sensor (even though the LED probably won't come on), or does it not function at all?
>
> The reason I ask is because I'd like to have the sensor start warming up before I actually start the car, but obviously without the engine running, the input voltage is going to be low (in the 12-13V range).  Will the heater still work to some degree at that voltage, or is it an all or nothing deal?
>
> Just wasn't sure how the circuit works in that respect.  I'm not electronically inclined, to say the least...
>
> Thanks!
>
> --Scott
>

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