Resistance P1 is for setting the set point. The set point value and the LDR value are displayed on the LCD. If the LDR value is lower than the set point value, the relay will be connected and in the otherwise relay not be connected.
Resistance P1 is for setting the set point. The set point value and the LDR value are displayed on the LCD. If the LDR value is lower than the set point value, the relay will be connected and in the otherwise relay not be connected.