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.

Well, invert the negative tension with a op amp and arduino will accept that, then at software level invert it again showing the wave below 0v. Then we can view in the screen waves from -15v to +15v.

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