A simple design for a quadruped robot. The robot should be easy to print on a small hobby grade printer (the one depicted was print on a Printrbot Simple Metal).  The assembly doesn't requires screws/bolts , the parts click-fit together (0.3mm of tolerance). #Updated 3.11.16 Based on feedback made some small changes to the design (larger room for electronics and better fit/lock system for the "belt") and uploaded a new set of STL. For the electronics you will need 8 servos (9G.) a microcontroller a servo controller and power. The model in the picture use the following: Arduino Uno ( https://www.adafruit.com/produ... ) Adafruit 16-Channel 12-bit PWM/Servo Shield ( https://www.adafruit.com/produ... ) 4xAA Batteri holder ( https://www.adafruit.com/produ... ) 8x MG90S High Speed Micro Servo Metal Gear There ain't much room with this setup, so I'll plan to order a Adafruit Feather ( https://www.adafruit.com/produ... ) and a 8 channel Servo FeatherWing ( https://www.adafruit.com/produ... ) The robot was designed using OnShape, a browser based parametric CAD software package. You are free to copy/customise the project. The link to the project is: https://cad.onshape.com/docume... OnShape is free to use for up to 10 private projects and unlimited for public projects. You can read more about other quadruped bots at my blog at www.burningservos.com Video of the walk cycle (of af previous laser cut design): Felix walk cycle