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Security | Electronic circuits

Example: Infrared control system
Electronic circuits archive 

Electronic circuits -> Security

Geiger counter
High Temperature ALARM
Home security project
IC Controlled Emergency Light with Charger
Low power RFID transponder
Magnetic Gun
Metal detector
Metal Detector Description James Trevelyan (Metal detector theory)
Micro-power over temperature alarm (PDF)
Miniature loop alarm
Miniature Loop Alarm
Modular Burglar Alarm
Modular Burglar Alarm
Moisture alarm
Motorcycle alarm
Motorcycle Alarm
Novel Buzzer
One-IC two-tones Siren. Double tone Police sound. Single tone old ambulance sound
Parallel port dongle (12C508A) By using the PIC 12C508 MCU from Microchip, we can make a cheap and simple hardware protection key (dongle).
Perimeter monitor

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