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Circuit Bench

  • Presence Detector (CB18741E) The original name of this project found in documentation from the 90s is “ghost hunting”. The circuit uses a not too long stretched plate or wire as a sensor and has its adjustment made by a trimpot. The power i

    Presence Detector (CB18741E) The original name of this project found in documentation from the 90s...

  • Network Sound Link Receiver (CB14275E)

      The circuit shown is the receiver for the CIR5645S, also suggested by National Semiconductor. The...

  • Geiger Counter 2 (CB7810

    E)      We found this circuit in a PE Hobbyst Handbook from the 90s. The components are common, except...

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