An Arduino with 40 lines of code, a temperature resistor, and servo are all that’s truly needed to save some dough with this thermostat by [Peter Hamilton]. LEDs and a potentiometer are added… ...

We set the potentiometer pin as 0 (A0 on the Arduino Uno board), the CONTROL variable is the voltage that is used to cotrol the led brightness of the speed of the fan. In the setup() function the ...

My setup is a bit crazy, I happened to have a huge NSK Megatorque servo with a super high resolution encoder, so I am using that. It makes 147Nm of torque, though so I am using deliberately weak ...