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Picked up a neat wooden robotic arm that uses three linked pairs of syringes as a hydraulic system. One pair swivels the base. Another lifts and lowers the arm. The third actuates the gripper. I used some Gareth-style DIY linear actuators to drive the control syringes, hooked them up to a Dagu Mini Driver board, and now I have a simple programmable hyrdaulic robot arm. The Arduinio code is in the attached zip file. First Video: Test of the stock hydraulic robot arm from Marbles the Brain Store. Second ...
This is a companion discussion topic for the original entry at https://community.robotshop.com/index.php/robots/show/hydraulic-robot-arm