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Circuit Bench

  • Overload Protection for Instruments (CB13656E)

      We found this circuit in a 1972 publication. The transistor could be the BC558. The diodes can be...

  • Current Monitor (CB15053E)

      This circuit can monitor direct or alternating currents. Resistor R1 is calculated so that the...

  • Hearing Aid Amplifier (CB22566E)

      This circuit that can be assembled in an “aspirin box” was found in the Radio Electronics magazine of...

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