BOB the Biped legs

While printing the inMoov robot I made some progress on BOB the Biped. This is an open source project build by K.Biagini. You can find it at

To build BOB you have to print 6 parts on a 3D printer. BOB has four servo’s. Two for each leg and is powered by 4 AAA sized batteries.

Part list

  • 3D printed parts
  • 4 small servo motors
  • Battery holder for 4 AAA batteries
  • Arduino Pro Mini (5V)
  • Distance Meter
  • Wires
  • Small breadboard

Printing the parts
BOB has only 6 parts. The base plate, the head, two brackets and two foots. I used a Ultimaker printer to make the parts and took a day to print. I am planning to make two of them. One red and one pink. I have two daughters. The parts have a tight fit so you need to sand it down a bit.


Mounting the parts
I used small servo’s from Tower Pro. There are three screws in the package. I used two to mount the servo lever to the L-shaped bracket. The four spare screws from the four servo’s are used for mounting the two servo’s on the feet. I used hot glue to fix the servo’s to the base plate.


As you can see on the photo, I soldered a 3 pin connector on the wires of the servos.

Leave a Reply

Your email address will not be published. Required fields are marked *

This site uses Akismet to reduce spam. Learn how your comment data is processed.