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Electronic circuits


Radioespionage and defence
Spy pieces, protective devices, signaling
  • Alarm device with a phone challenge

  • Alternative devices of communication

  • Antispy

  • At that suitable telephone card?

  • Code lock

  • Code lock buttons without management

  • Detector bugs with logarithmic scales at 12 LEDs and audible indication

  • Electronic password

  • Electronic password (continued)

  • Electroshock means of protection

  • FM Radio екфтыьшееук with the band 100-108 MHz

  • FM transmitter with quartz

  • Micro FM transmitter with the band 80-100 MHz

  • Micro transmitter with a current stabilization

  • Miniature radio transmitter with the power supply batteries for electronic clocks

  • Radio transmitter with a high frequency stability generator in the frequency range 65-108 MHz

  • Security system with laser JDM

  • Simple small beetle detector with decentralised two LEDs

  • Simple system contactless identification

  • Simplest spy bug

  • Small field detector with the indication on the two LEDs

  • The high safety digital lock

  • Three circuits simplest spy bugs at 66-74 MHz

  • Ultrasonic alarm device

  • Инфракрасный “сторож” для дачи

  • Простая охранная система

    Total 26 pages


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