This circuit is a simple laser anti theft alarm with SCR, laser, LDR and a few other components.
When the theft body cut the laser beam, the buzzer turns ON and latch (stay ON) until the Reset button pressed.
I designed the PCB in the shape of tiny house (my YouTube channel logo)
When the theft body cut the laser beam, the buzzer turns ON and latch (stay ON) until the Reset button pressed.
I designed the PCB in the shape of tiny house (my YouTube channel logo)
Parts list:
BT169
LDR (3pcs)
Laser 5V 5mW (3pcs)
Buzzer
10K Potentiometer
Push button
You can download the Gerber file of this PCB from here:
https://www.pcbway.com/project/shareproject/Laser_anti_theft_circuit.html
You can download the Gerber file of this PCB from here:
https://www.pcbway.com/project/shareproject/Laser_anti_theft_circuit.html
Circuit:
Video:
