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  1. emarthinsen

    Mechanics of a lifting arm

    Hello- This might be a basic question, but here goes. I'm trying to design a counterweighted lifting arm for an adjustable work surface. I attached a picture that shows the basics of what I am looking for. Essentially, I'm looking for a mechanism that will allow the work surface to be raised or...
  2. emarthinsen

    Basic Diode Question

    Hello- I'm working on a sample circuit that controls a DC motor and it calls for some 1N514 diodes. These particular diodes are proving extremely hard to find. Does anyone know of a comparable substitute? Regards- Eric

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