This little homemade robot takes all of those impressive no-look Dragonforce-on-expert Rock Band/Guitar Hero YouTube videos and destroys them with a cold, clockwork efficiency. Updated.

Here's how it works in a nutshell:

- light sensors read the falling notes (brightness set to max)
- light data is sent to an Arduino Mega, which is monitoring for data spikes
- The Arduino filters the data, and sets a threshold for "on" and "off"
- an "on" means the tiny robot finger presses the screen
- the capacitive touchscreen requires a human touch to operate, so a rudimentary Xacto knife/copper wire workaround was created. Simply hold the knife while the robot plays, and the current is enough to trick the iPhone

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The code is available for download, should you want to help the robots spread their lifeless 87% accuracy music around the globe. Update: You're right, eagle-eyed commenters. The result is in fact 87%. We're safe! [OhBowz via Boing Boing]