Canadian electronics geek and nascent YouTuber [Technoyaki] wanted to measure 20 volt signals on his Arduino ... out of sixteen resistors, four op amps and a separate 6 VDC supply.

Drive the gate of the FET with an op-amp that maintains either constant current or constant voltage. Control everything with a DAC, and you have a programmable load controlled by an Arduino.

The Arduino UNO R4 Minima comes equipped with the ... extra on-board peripherals such as a 12-bit DAC, CAN BUS, and OP AMP, extended 24V tolerance, an SWD connector for easier debugging, and ...

How do you get the input of an op-amp to work below the negative-most supply rail?, I asked. Now I know – thanks to the patience of ADI field application engineer Andreas Koch. It was not just any ...