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 ...

The resetAlarm integer is the Arduino pin where we connect the button that is used the reset the alarm. The relay is connected to pin 7 and the active buzzer to pin 8. On the next lines you need to ...

[youtube= A few weeks ago, we saw codebender, an online replacement for the Arduino IDE that allowed you to upload a sketch to your board from a web browser. Over on the codebender blog [Vasilis] a… ...

This DIY indicator is based on the Spaceship Interface code found in the Starter Kit Projects book, ... (paired with a relay for the Arduino Uno). ... an Arduino Uno, a 16x2 LCD, and a push button.