The Automatic Chicken Coop
Build a henhouse motion detector that notifies you when your brood arrives safely in their coop each night.
From MAKE:
22: Remote Control / Wireless page 64
Exclusively in the Maker Shed, this updated Redpark Breakout Pack for Arduino and iOS makes interfacing your iPhone, iPad, or iPod touch with the real world easy! This bundle includes the new RedPark TTL Cable for iOS so a TTL adapter (and soldering) is no longer required.