Light Sensor Circuit Using Ldr. Working of ldr controlled led using arduino. A voltage divider made using ldr ldr1 and a potentiometer rv1 b output led d1 in our switching circuit made using a transistor bc547 q1.
The voltage divider output is feed to the analog pin of the arduino. Firstly connect ldr on breadboard then connect the base of bc547 to one pin of ldr. We previously made many circuits using ldr which use ldr to automate the lights according to requirement.
The led can be replaced by any electronic device like buzzers relays.
Firstly connect ldr on breadboard then connect the base of bc547 to one pin of ldr. The voltage divider output is feed to the analog pin of the arduino. For the first condition when we power up the circuit light incident on ldr has minimized the. Simple light sensor circuit using ldr hardware components.
