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Manual Homemade Hydraulic Arm

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Uploaded on Sep 13, 2010

A manually controlled Hydraulic arm, made out of simple materials like wood, hot glue and syringes (for the hydraulic pistons). Its total length (when fully deployed) is 40+cm and can lift weights up to 300g. Its disadvantages: its slow and impressice.
The compression unit is made out of ordinary 6V motors which operate under the signals of electronic pulses, generated by the controll unit. In order to compress the liquid inside the hydraulics (water), the motors twist a screw that transforms the circular motion to linear. Therefore the stationary syringes which have smaller volume (2.5ml) than the ones on the arm(5.0ml) compress the water which, since not compressible, causes the large syringes on the arm to expand. Notice that the volume difference of 2.5 - 5.0 ml doubles the pressure of the 5.0 ml syringes.
The controll unit is a Basic Stamp 2 microcontroller which, under the instructions of the buttons on the controller, sends pulses or activates the relays that operate each motor.

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