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 ...

allowing the sensor to measure the distance and subsequently prompt the buzzer to emit the right note. Since the project uses pretty basic components, the Arduino code is equally basic ...

Once you learn how to read Morse code, you might want to teach your Arduino to understand it, too. Or, you can check out some other Morse-based projects.

[Flute Systems] has released an open source DIY game buzzer system based on the Arduino that will help instantly ... the way [Flute Systems] did it, then check out this version that uses 900 ...