From climber to Crawling Alien :(

Objectives

1. Using the servo motor to explore rotational and linear motions.

2. Create a Crawler 

Hardware

Required items: Just a Servo, "a limb", rubber band, potentiometer, tape, Arduino, wires

The control circuit is as follows 

Crawler

My original idea was to create a crawler that can actually crawl up a ladder. But thanks to my great mechanical skills and lack of equipment at home, I could not come up with a hinge that would grasp each rung. 

So the climber turned into a crawling alien. I use a pencap to linearize motion in a side to side fashion. This translates into a little forward motion as the pen cap hits the ground at an angle.

A video can be seen at http://www.youtube.com/watch?v=Ch_hc8dvlkI