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Circuit Bench

  • 3-transistor amplifier (CB23537E)

      This transformerless 16-ohm speaker circuit was found in a Radio Electronics from October 1963. The...

  • Timer (CB15603E)

      This timer activates a relay after a time interval of up to 15 minutes has elapsed, starting from...

  • Simple Tachometer (CB12636E)

      This circuit consists of a frequency-voltage converter. The circuit can be used as the basis for...

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