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.

This post is in response to a reader who asked about detecting mains electricity using a microcontroller. The easiest and safest way to detect mains electricity using a microcontroller is with an ...

The Arduino 101 equipped with ... and the potentiometer will provide a varied voltage input to the analog 0 pin to emulate a battery sensor. The point is to show how Bluetooth can be used to ...

Even if the connected load draws ... record the voltage at each step. Also keep an eye on the self-consumption of the DC voltmeter used with the setup (for me, it’s around 20 mA). It’s almost been six ...