He chose an ATMega644 as the brain because it’s Arduino ... the source code. Check out the video of the Nickelphone after the break, then browse through some other capacitive touch hacks ...

Bare Conductive raised over US$200,000 on Kickstarter last year for an Arduino ... Touch Board's capacitive capabilities, a bit of "distance code" can be uploaded to the board, making the touch ...

[Sebastian] is learning Morse code ... a touch sensor. An ATtiny45 measures the time it takes for a single metal plate to fully charge. It’s the same idea behind the wonderful Arduino CapSense ...

Capacitive sensing isn't limited to your smartphone. In fact, you can use contact with human skin (or any other conductive surface) to trigger almost any circuit. And the Touch Board from Bare ...

You can’t have a touch sensitive switch without a way to detect the presence of a finger! A touch sensor, especially a capacitive touch sensor ... Luckily there are a few good Arduino libraries there ...