I play with different educational manipulatives for a living. (Visit www.weirdrichard.com). Over the years I have built many robots!
I recently came across a great description of a device that would run through all the different possible combinations for a Master Combination Lock. Having a number of these locks without a combination, I thought this would be a great robotic project for this competition.
Unfortunately, I have not had the opportunity to render the step-by-step directions, so for now you will have to be content with some digital photographs.
UPDATE: I have posted pictures of an updated model using the PCS BRAIN.
A great analysis on finding a Master Combination Lock combination: http://www.jimloy.com/math/combo.htm
I want to cite Neil Fraser's locraker as the source of inspiration!
(This link was not working when I checked).
Note: I recommend Michael Sameks ft Designer to create CAD images of fischertechnik models.
Step 1: Description of Robot
In my first version of the Lock Picker, I used a pile of fischertechnik elements including two 9 v motors, a PCS Programmable Brick with the PCS Robotics Contoller, and a simple touch sensor.
Step 2: Have Fun!
See my instructable on going to Morshausen!
( http://www.instructables.com/id/Traveling-to-fischertechnik-Convention-Morshausen/ )