Here's a handy Motion Control Rig for Time-Lapse Photography from MAKE:
In this project, we’ll be using an Arduino microcontroller and a stepper motor to precisely control the panning of a camera during a time lapse. Using this LCD keypad shield as an interface, we can precisely set our starting and stopping positions, as well as setting the duration of our time lapse — anywhere between five minutes and 12 hours. The device can be powered via any USB power source, and those portable USB bricks used to keep your smartphone alive during long days will work perfectly, and can power the device for up to 12 hours.
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