I decided to to throw together a "motion control" unit for time lapse photography, this is the result of my first attempt.
It is powered by a BBQ rotisserie motor.
It isn't pretty and it doesn't work great but I'm going to keep working on it until I can afford to buy a real one from dynamicperception.com They inspired my to build this because I just couldn't wait to use this technique.
The calculator is acting as an intervalometer you can find instructions here. instructables.com/id/Turn-a-TI-Graphing-Calculator-into-an-Intervalomet/#previewlink
Update - See my latest version here: vimeo.com/37495550