The YL-333 Magnetic Antitheft Alarm is an easy to install security alarm system for doors and windows. This battery-operated device works on the principle of magnetic proximity detection. It can ...
February 20, 2018 – STI’s newly redesigned Exit Stopper Door Alarm continues to help solve the problems of unauthorized exits and entries of fire or emergency doors. The multifunction door alarm now ...
Now you can build your own simple door alarm security system using a tiny microcontroller chip PIC12F635! The circuit is nothing but an aural alert unit, which raises ...
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