polyglot:
- wire the ADC (might be arduino, might be something smaller) up to the high voltage, insulate it very well, run it off an isolated power supply (see those $10 isolated 5V-5V or 12V-5V DC-DC chips; they're very useful) and send your digital outputs over an opto-isolated serial connection.
This is an interesting idea. My possible project is a high-side shunt for solar panels feeding a 12v lead acid battery. I would need to power the Arduino from the same battery.
...R