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Circuit Bench

  • Audio Booster (CB951E)

    This booster circuit for audio signals, which is nothing more than an audio preamplifier for...

  • Pre Amplifier For Crystal Microphone With 741 (CB924E)

    The configuration of this circuit was suggested by an old English publication that comes to...

  • Magnetic proximity sensor (CB7920E)

           This sensor triggers an oscillator emitting sound when a magnet is approached by a reed switch....

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