The output from the LDR op-amp circuit can be used to drive an LED directly or via Arduino. In this tutorial, the circuit has been taken on a PCB, in which the operation as a light or dark sensor can ...

The photoresistor sensor module includes a LDR (light-dependant resistor) in series with a 10K resistor. The AO pin is connected between the LDR and the 10K resistor. The voltage on the AO pin depends ...

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 ...

Components Required for Building the Light Following Robot Arduino UNO R3 x1 LDR Sensor Module x2 2WD- Two Wheel Drive Robot Car kit (includes the acrylic frame, Wheels, BO Motors, Castor Wheel, ...