A simple Biped robot walker with only two servos, controlled by an Arduino Micro. Based on http://davidbuckley.net/DB/inspired/KenGracey/KenGracey.htm

Print both sides, both feet, two ankles, four servo carriers, two rear legs, two front legs. The holes are dimensioned so that M3/4-40 will tap right into it. Use M2 for the link in the rear legs and the attachment of the servo rod to the feet.

See photo for details of links and rods. The servo arms (length 45mm) are printed too (http://www.thingiverse.com/thing:28566). The eye bolts for the leg linkage are Conrad #234955.

Uses two mini or micro sized servos and an Arduino Micro with the servo library.

Code for simple walking at https://github.com/ServoKit

Video: https://www.youtube.com/watch?v=KWFyN5lX31U

Printing in normal quality takes about 4hrs. on an Ultimaker 2. You can also get the printed parts from Shapeways: http://www.shapeways.com/product/DM7DWX3EX