Linking the Arduino to another device, such as a speaker, will allow you to set up a chime that will trigger if the door is rattled. If your security system works with third-party accessories, you can ...

In an age of streaming media it’s easy to forget the audio CD, but they still remain ... It’s something [Daniel1111] has done with his Arduino CD player, which uses the little microcontroller ...

To control the LEDs, he’s using an Arduino Uno (Atmega328p) which measures the audio level in order to modulate the LED output. A bit of software later (shared on GitHub if you’re interested!) ...