Is it possible to figure out DC watts if you have just one ADC available? I'm currently using two to measure voltage and current.
Hi,
Well you could use an analog switch, but you'd have to switch it from one channel to the other which would take a DIGITAL output pin. So you'd save an analog pin but use up a digital pin.
There are other ways but require some external circuitry. For a simple example, use a second small low end uC to measure the power and send it to the 'master'.