In this quick Arduino tutorial I will explain how you can control ... on pin 2. This voltage is used to drive the transistor that will switch ON the relay and the load (in our case the fan) will be ...

One of the most convenient control methods is to send and receive commands using ... relay serial information from your smart device to the dev board and vice versa. Just reverse the receive (Rx) and ...

This one uses an Arduino Mini with a serial Bluetooth module. He patched into the motor driver circuits on the original PCB. While he was at it he also soldered in some LEDs to use as switchable ...