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Circuit Bench

  • IR tone remote control (CB20972E)

      This circuit is from a Popular Electronics from the 90s. The circuit has a tone frequency...

  • Audio Ohmeter CIR498 (CIR808E)

    This resistance meter uses a two-transistor oscillator as basic configuration. The tone produced...

  • Transistor Test (CB22542E)

      This circuit is from a commercial transistor test model found in the March 1958 Radio Electronics...

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