We’ll stipulate that an Arduino may be overkill ... read the temperature sensor, and turn the AC on or off accordingly. Setpoint and current temperature are displayed on an OLED screen.

There are some old AC units out there that ... the shape of the control knob. An Arduino measures the temperature of the room via a DS18B20 temperature sensor which then has the servo turn ...

(19.05mm x 2.36mm) buss bar. With a dynamic range of 0.10 to more than 1000 Amps, this sensor provides extremely accurate measurement of AC current at 50 Hz or 60 Hz in smart meters, industrial ...