This circuit is a 110/220V AC Photocell switch (Dark activated switch) with 2 wires, it turns ON the lamps at the night and turns them OFF at the day time automatically.
The standby state power consumption in this circuit is very low, about 0.05W only,
But the commercial photocell consume about 1.6W in the standby state. (32 times more)
The circuit working with both 110V & 220V AC and the Max. load can be 4A (LED, CFL & incandescent lamps).
You can order this PCB from PCBWay:
Parts list:
IC 4093
SCR C106M
Bridge diode 8A
Resistor 30K
Resistor 1M
LDR
Zener diode 10V
Circuit:
If your lamp flickering you can add a 100nF ceramic capacitor between pin 7 and pin 14 of the IC, but don't use electrolytic capacitor because it has high leakage current.
The IC used in this circuit is a micro power IC with schmitt trigger ,
You can't use other NAND or NOT gate IC because they aren't Micro power.
The SCR also should be high sensitive gate SCR (C106M).
The sensitivity of the circuit can be adjusted by changing the 30K resistor to other value.
This circuit deals with mains voltage so it can be dangerous.
The IC used in this circuit is a micro power IC with schmitt trigger ,
You can't use other NAND or NOT gate IC because they aren't Micro power.
The SCR also should be high sensitive gate SCR (C106M).
The sensitivity of the circuit can be adjusted by changing the 30K resistor to other value.
This circuit deals with mains voltage so it can be dangerous.
Video:
