MIT student Chris Varenhorst thought his iPhone was good for more than just apps. So, he built a “hydraulic-powered door that can be opened with the tap of an iPhone app or the rap of a secret knock sequence.” Video after the break.

So he took an old Pentium III computer running Ubuntu, a Phidget control board, plus a handful of servos, solenoids, pistons and actuators, hacking them all together into this elaborate, iPhone-controlled door system.

[via NewlaunchesPopsci]

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