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Circuit Bench

  • 20 W amplifier (CB16111E)

      This stage of audio power is suggested by the Hitachi Semiconductor Manual, using a complementary pair at...

  • DC motor speed control (CB8771E)

           Originally suggested by Harris in the 1990s, this circuit uses an optical tachometer. The circuit is...

  • Small power supply (CB22263E)

      This small unregulated variable power supply was found in an American book from the 60's. The...

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