Ted Hale has taken a cheap wireless movement detector, put the detector at the end of his drive and then hacked the receiver to connect up to a Raspberry Pi. It’s a nice little project that required building a small circuit and soldering it together. You can read more about the project here.
Tim Massaro has written an Instructable to create a Pi Joke Machine. He’s used a PiFace Control and Display (which is an LCD screen with added buttons) and wrapped it all up in a project box.
A father-and-daughter team wants to control servo motors using PWM (Pulse Width Modulation) on the Raspberry Pi. As a demonstration of how possible this is, they’ve started out by using PWM with an LED to fade it up and down. To do this, they’ve used the Occidentalis distro from Adafruit (although this was probably overkill as you can do similar on plain ol’ Raspbian).
Karl Herrick has taken a Gertboard and a 4.5v LEGO motor and linked them up to the Pi. He’s then looked at Alex Eames’ Python Gertboard suite and written some test scripts as a proof-of-concept.
Paul Brown’s done a nice write-up and exploration of the Fish Dish expansion board over on smstext. Nice use of Daniel Bull’s BerryIO, too.
Alex Eames at RasPi.TV has written his second post in a series he’s doing using Tweepy to send/receive tweets on a Pi.
