The documentation says there is a third ADC “on the header.” Where, exactly? I’m measuring a voltage between 0 and 1.5 and the divider allowing 0-24 volt range is making the steps too large to be useful.
Correction. Three ADCs use the 0-24v range. I’m looking for the fourth one that isn’t available at the screw terminals.
This is referring to the HAT, not the pHAT. The pHAT doesn’t break out the remaining ADC pin.
Thanks! I’ll either amplify the signal or use a different sensor.