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This FM radio-controlled anti- theft alarm can be used with any vehicle having 6- to 12-volt DC supply system. The mini VHF, FM transmitter is fitted in the vehicle at night when it is parked in the car porch or car park.   ... Read more »
Category: Alarm | Views: 1255

The circuit consists of a small PIC microcontroller, assembly program, and a few other parts to detect a switch closure from an open door, window, or manual push button and then dial the cell phone number, and transmit a steady tone to indicate the source of the call. ... Read more »
Category: Alarm | Views: 2170

The circuit will provide a beeping sound to alarm the household that the refrigerator door has been opened for more than 20 seconds.  ... Read more »
Category: Alarm | Views: 1306

The circuit will be useful as personal alarm and anti-snatching bag unit since the design is very small and portable, which can also be used for windows and doors control.  ... Read more »
Category: Alarm | Views: 1105

The circuit was designed to illustrate the operation of an electronic keypad to be utilized in the burglar alarm system by having five keys as the security syntax.  ... Read more »
Category: Alarm | Views: 1973

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