In this quick Arduino tutorial I will explain how you can control a relay using the Arduino Board, one 1K and one 10K resistors, 1 BC547 transistor, one 6V or 12V relay, one 1N4007 diode and a 12V fan ...

Set the start pin and number of relays at the top of the sketch; Flash this sketch to the Arduino; Connect to the Arduino's serial port with 9600 baud; Issue commands like 'r31' to turn relay 3 on, ...

Relays driven by Arduino control 80amp relays for each heating element in the VW 12v heater (1K0963235F). Potentiometer has 5V and GND from Arduino board. arduino_vw_heat.h and arduino_vw_heat.cpp ...

Whenever the sensor detects that the water/ moisture level is below 300 relay will be triggered by Arduino and water starts flowing through the pipe. Here the end terminal of pipe is closed, and a ...