Light control, single button switch wall base circuit

During the day, due to the high indoor brightness, the switch load (relay) does not work when the button is pressed. At night or when the indoor brightness is dark, the load can start working by pressing the button switch. This means that whether the load starts after pressing the button depends on the brightness of the room. Once the load is started, regardless of the brightness of the room, However, pressing the key switch again can turn off the load. PR is the brightness control and adjustment resistor. You can also increase or decrease the resistance value as needed. The photoresistor should be installed in a position that is not blocked when the button is pressed (if possible, try to install it in a place that cannot be artificially blocked). Otherwise, when the indoor brightness is high, the load will start accidentally after pressing the button.