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This is a circuit where an alarm will go off if the door that the circuit is connected to is opened.
Automatic door alarm project. Circuit diagram of automatic door bell using object detection. When the door is ordinarily closed the alarm is not triggered. Likewise we can create many useful projects using this like. Technical hacker 3 034 views.
Top 5 elctronic project with bc547 transistor tri ac rgb led. Automatic water level indicator and controller using arduino. Full code for this door alarm project is given below. Schematic of the door opening alert circuit.
This door open alarm uses an input sensor fixed at the corner of the door frame and a magnet fixed on the door panel close to the sensor. The door opening alarm circuit or front office visitor alert is used for alerting you when a customer is at your office shop. How to make a automatic door security alarm duration. This circuit operates using a pair of ultrasonic transmitter and receiver modules which are used to detect the person and then if the person is detected the door bell is automatically turned on when the person is in front of the door.
Primarily ultrasonic sensor is used to measure distance from any object but here we can see that it can be used as security alarm or door alarm with arduino. When the door is opened up the alarm goes off alerting us that the door has been opened.
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Figure 1 Automatic Door Bell With Object Detection Circuit Diagram Electronic Circuit Projects Electronics Circuit Circuit Diagram
