Light Operated Relay Circuit Schematic

Light Operated Relay Circuit Schematic

LDR is used as the light sensor. Low resistance of about 100 ohms in bright light, but increases to 10 megs or more in the dark. Pre-set VR1 sensitivity LDR. LDR will perform during the day so that you will not get T1 gate bias on the base. Therefore, the relay remains deactivated. When the light intensity is reduced, LDR provides more resistance and more current passes to the base of T1 and is being carried out. Then switch to the deportation of pregnancy. Adjusting VR1 to move the relay, especially in the light level. LED indicates the relay activation