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  • Planning a Workbench (ART645E)
  • Magic Pendulum (ART652E)
  • Dip Meter  (ART643E)
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Circuit Bench

  • Sound operated switch (CB22096E)

      This sonic, sound or vox switch uses common SCR and transistors can be BC548 or equivalent. The...

  • Calculator to timer converter (CB9601E)

      This circuit allows you to use a calculator as a timer by directly activating a sum key with...

  • Darkroom photometer (CB8344E)

          This circuit is from the time when photos were revealed in darkrooms. We found it in a 1968...

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