This module has many application in the industry.It is usually present in elevator doors,automatic doors,furnaces,machine security systems,printers,etc.It is also used to count people, or to detect bodies.
Electronic Circuit Description
Try place LDR on light,see what happened.The relay RL1, Still in not active condition.When you block LDR from light or in darkness,sensing transistor T2 will on, this signal then amplified and drive T1 to turns on RL1,Relay. Then F and OUT1 are connected.You can used the relay output to turn on something useful.
Try place LDR on light,see what happened.The relay RL1, Still in not active condition.When you block LDR from light or in darkness,sensing transistor T2 will on, this signal then amplified and drive T1 to turns on RL1,Relay. Then F and OUT1 are connected.You can used the relay output to turn on something useful.
Electronic circuit Diagram Component List
-Resistor
R4 - 1 - 10 ohm , R1- 1 - 270 ohm , R5- 1 - 1K
R6- 1 - 4K7 , R3- 1 - 10K LDR, R2- 1 - Adjustable 4K7
-Capacitor
C1- 1 - 100nF , C2- 1 - 100nF (electrolitic)
-Transistor
T1 - 1 - 547 , T2 - 1 - 337
-Miscellaneous
Diode D1 - 1 1N4148
Photoelectric Cell - 1
Relay -1
