The connection diagram for the Arduino is as given below. One leg of the LDR is connected to VCC (5V) on the Arduino, and the other to the analog pin 0 on the Arduino. A 100K resistor is also ...

This is the complete circuit diagram for this home automation project. I have explained the circuit in the tutorial video. The circuit is very simple, I have used the GPIO pins D23, D22, D21, D19, D18 ...