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Circuit Bench

  • Negative Feedback Stage (CB6131E)

          This circuit is from a 1967 US publication. The configuration can serve as a basis for designs...

  • 40 kHz repellent (CB20815E)

      This ultrasonic insect repellent was found in American documentation from the 1980s. The...

  • Oscillator Using a Voltage Comparator (NI016E)

    Oscillators up to some megaherts can be made with comparators like the LM139, 239 or 339. Theses...

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