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Burglar Alarm Control Keypad
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.
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Buzzer Circuit with Unique Functionality
The circuit was constructed using a few components to produce a unique buzzer with adjustable buzzer tones.
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Alarm System for Entrance/Exit Gate
The circuit employs the functions of reed switches to produce a gate alarm that is powered by a universal AC/DC power supply
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Alarm Circuit Built for Motorcycles
The circuit was designed to create an early warning alarm system against any form of theft that is significant to the owners of motorcycles or bikes.
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Alarm Circuit for Snoring Prevention by 555 Timer
The circuit was designed to produce a circuit that will alarm a sleeping person to prevent snoring by using a vibrator instead of an audio alert so as not to affect the whole household.
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Alarm Circuit for Water Level Display
The circuit was intended for monitoring and measuring the fluid level or content in a storage tank or reservoir by providing visual display with an audible alarm that can be switched.
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Electronically Controlled Security Door Keyboard
The circuit was constructed to provide a simple electronic lock system based on a single integrated circuit and will require a code of seven digits.
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Alarm Circuit for Refrigerator Doors
The circuit will provide a beeping sound to alarm the household that the refrigerator door has been opened for more than 20 seconds.
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Portable Alarm for Personal Use
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.
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Dummy Alarm with Flashing LED
A LED flashing briefly once every 5 seconds to imitate the indicator of a real alarm is the function of this dummy alarm project with the use of a 7555 timer IC.
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