The Clapper! A Rasberry Pi detects a double clap, and sends a web request, controlling the Hue lights, thought IFTTT.
Introduction

Components:
- LED Strip
- Screws, washers, bolts and standoffs.
- Soldering iron and solder
- 4mm plywood
- 3mm white acrylic

Links
https://www.raspberrypi.org/forums/viewtopic.php?t=17428
https://github.com/nikhiljohn10/pi-clap
http://raspberrypi-aa.github.io/session4/requests.html