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 ...

Arduino . Breadboard . Jumper wires . 2 Tower Pro ... The joystick shown in Figure 10-2 is basically two potentiometers and a button that allow us to measure ... Attach a laser diode to the ...