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 ...

PANIC ALARM - ARDUINO // // by T.K.Hareendran // int rlyPin = 12; // Relay Output Pin int sensPin = 2; // Switch Input Pin int ledPin = 13; // LED output Pin int pzSpeaker = 10; //Piezo-speaker Output ...

Impulse relay turns on with an electrical impulse at the control input and turns off again with another impulse.

The joystick shown in Figure 10-2 is basically two potentiometers ... The joystick x-axis is attached to Arduino pin A0 and the y-axis to Arduino A1, and these are our INPUT.