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Circuit Bench

  • Dynamic Power Transistor Tester (CB17592E)

      This circuit consists of a test oscillator for medium and high power NPN transistors. For PNP,...

  • Digital Audio Recorder (CB18606E)

      This interesting circuit records a few seconds of audio signals, reproducing them in a small...

  • Low Impedance Microphone Preamplifier (CB10675E)

      This circuit is from a Popular Electronics from April 1991. The magazine no longer exists, but the...

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