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Well this is my first successful robot, it my version from the one motor walker developed by Robomaniac, you can find a great tutorial here http://www.instructables.com/id/How-to-build-the-one-motor-walker/ I used this servo from Hobby king http://www.hobbyking.com/hobbyking/store/uh_viewItem.asp?idProduct=16269 they are very strong and cost only 3USD and give up to 4kg torque I made only slight mechanical changes on it, instead of using the gear I used a crossed bar, and the legs are made of a rod ...
This is a companion discussion topic for the original entry at https://community.robotshop.com/index.php/robots/show/one-motor-walker-ala-ez