Have you ever wanted the party to start as soon as you enter the room? Now it can every time with the Ultrasonic Party Starter!

This project uses an Arduino and an HC-SR04 sensor to kickoff the party. If you are unfamiliar with the HC-SR04, it is an ultrasonic ranging module. They can be found for very cheap (I got mine on amazon for $3.77 -

http://www.amazon.com/gp/product/B0089VA3AY/ref=oh... ).

It acts much like sonar - creating a pulse of sound or "ping," then measuring the time it takes for the echo to return. We will use it to detect when an object is within a certain range of the device and trigger an RGB LED to flash to the beat of Daft Punk's Aerodynamic.

If you are new to using the Arduino to play sounds, I suggest you start out with the tone tutorial found at the arduino website - http://www.arduino.cc/en/Tutorial/Tone.

If you have never used an ultrasonic ranging module try out http://www.arduino.cc/en/Tutorial/Ping.

The code I wrote for this device was inspired by both of these projects.

Now let's get this party started!