This instructable shows you how to add a time lapse module to a Rollei Compactline 52 digital camera.
Time lapse means pictures are taken at a specific interval of time. The time interval is adjustable over a wide range and it has an additional sensor, that interrupts the time lapse execution during the night, significantly reducing a large amount of black pictures. ;-)
What do you need:
a digital camera: Rollei 52 (although I guess it will work with most Rollei digital cameras)
a microcontroller (I used an Attiny24, but any other might do the same job)
a few electronics parts like transistors, resistors and connectors.
and a soldering iron
like this one from craftsman for instance.