Alert System
This project uses sensors to detect movement or opening of a door and then triggers an alert using a buzzer and lights. It can be used at home, in a classroom, or in small offices to warn people quickly.
How the alert system works
A small unit watches for movement or a change in state and warns people with sound and light.
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1
Sensor monitors the area
A motion sensor or magnetic contact sensor is placed near a door or in a room. It constantly checks if someone enters or if a door/window is opened.
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2
Controller reads the signal
A microcontroller reads the sensor output. If it notices a change (like motion detected or contact broken), it decides to trigger an alert.
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3
Alert is activated
The system turns on a buzzer and an LED, or sends a signal to another device. This gives an instant warning to the people nearby.
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4
System can be reset
After checking the situation, the user can press a reset button to stop the buzzer and prepare the system for the next event.