BHPian Skyline_Vista recently shared this with other enthusiasts:This truly reflects my passion for car electrics and DIY ...

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 ... INPUT); pinMode(Relay, ...

The Arduino also needed power. [Don] found a screw terminal on the alarm system circuit board that provided a regulated 12V output. He ran this to another power regulator board to lower the ...