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DIY Kit Photosensitive Sound Light Sensor Alarm Kit Electronic Production Parts DIY Module

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Note: Due to some reasons, this product is out of stock recently. If you make bulk orders, please feel free to contact our customer service orders@icstation.com. Bulk orders will be realized. Please kindly noted. :)

Description:

This circuit is used to detect ambient light, when the light is brighter, a sound and light alarm is sent out. Its power supply voltage is DC 3V to 5V.

Working Principle:
    W1 is adjustable resistance to regulate induction sensitivity, and GMDZ is a photosensitive resistance.
       When the light is brighter, the resistance value of the resistance is reduced. The base current flowing into the Q1 is larger.
       The voltage of the triode collector is reduced by D1 and the R2 is the current limiting resistor.
    At the same time, the base current flowing through the R1 into the Q2 is also larger. Q2 enters the state of saturation. SP1 is a buzzer and she starts to call the alarm.


Component List:

NO. Component Name PCB Marker Parameter QTY
1 Metal Film Resistor R1 10K 1
2 Metal Film Resistor R2 100ohm 1
3 S8550 Q2 TO-92 1
4 Photoresistance RG1   1
5 Buzzer SP1   1
6 S8050 Q1 TO-92 1
7 Potentiometer VR1 10K 1
8 Battery Box   AA*2 1
9 PCB   35*23mm 1


Diagram:


Finished Product:

 

Tested by ICStation's Outstanding Partner bzoli5706:

Learn More Details in the Video:
(The language in the video is English)

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DIY Kit Photosensitive Sound Light Sensor Alarm Kit Electronic Production Parts DIY Module
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