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Contactless Door Alarm

Published Sep 19, 2022
 LGPL-3.0
 1 hours to build
 Beginner
arduino

Contactless Door Alarm uses Light-Dependent Resistor sensor when hit with light senses it sends signal to Arduino and the alarm rings

display image

Components Used
Arduino UNO
Arduino UNO 		X 1
LDR -Photocell Photoresistor
LDR -Photocell, Photoresistor 		X 1
Buzzer 5V
Buzzer 5V 		X 1
Resistor 10 kOhms
Metal Film Resistors - Through Hole 10 kOhms 250 mW 1% 100 PPM / C 		X 1
Male to Female Jumper Wire
Jumper Wires Mach pin jumper wires 		X 4
9V Battery
Consumer Battery & Photo Battery 9V RECTANGLE 		X 1
Female to Female Jumper Wire
Jumper Wires Mach pin jumper wires 		X 1
Male to Male Jumper Wire
Jumper Wires Mach pin jumper wires 		X 1
Wire
Hook-up Wire 788133 RED 100 FT 		X 1
Wire Stripper and Cutter
Wire Stripper and Cutter 		X 1
USB Type A to B Cable
USB Cables / IEEE 1394 Cables USB A-B 28/26 BLACK 1.3 M 		X 1
Description

In recent years various viruses are attacking people and the virus spreads easily to areas we touch one such area which is frequently touched is doorbell switch or door itself. To break the transmitting of virus to other people Contactless Door Alarm is developed.

Components Used: Arduino UNO Board, Buzzer, Light-Dependent Resistor Sensor, 10k ohm resistor, Jumper cables, 9v battery.

All the components mentioned above are connected as show in the circuit below

 

 

Working

When a light hit the Light-Dependent Resistor it sends signal to arduino board which further sends signal to buzzer and the alarm rings. Below link shows a video how the device works in real world situation.

 

Video

https://www.youtube.com/watch?v=JXNPDXDZLg8

 

Codes

Downloads
Doorbell_circuit Download
   
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