In this project, we are going to build something very simple project, a temperature controlled relay that is used to turn on a dc fan. You can actually change the DC Fan to other electrical devices ...

Need a powerful electric motor on the ... a simple two wire DC motor. They also discuss some of their favorite ways to control the motors ranging from a light switch to an Arduino.

To fix this, [MechanicalCat] has come up with a current limiter for cheap DC motor controllers. The full write-up is in the included PDF file, and describes the set-up of an Arduino Nano sitting ...