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  1. Dale_Mahalko

    When Machinists Made Computers

    (I have no idea how this forum feels about digging up years-old posts, but, anyway.) The data inputs for the early analog/mechanical computers were fed from remote data sources using a tiny type of 3-phase alternating current motor/generator known as a Synchro motor or Selsyn, which were...
  2. Dale_Mahalko

    Power-off safety braking

    For people with epilepsy and other consciousness control disabilities such as narcolepsy, it is dangerous to have a seizure or loss of control when you're next to a running high-torque machine. A deadman's switch that must be squeezed or pressed to keep it running is a good idea to stop the...
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