This property allows us to use them for making light sensing circuits and many other applications. The resistance of these LDR decreases with an increase in intensity of light and vice-versa. LDR is a resistor whose resistance varies as the amount of light falling on it varies. LDRs are tiny light-sensing device which is also known as Photoresistors. So let’s get started and built this robot. Using this property of the LDR we are going to make our robot using Arduino, the LDR module, and the L298N motor driver module. It acts just like regular resistors, but it responds to the amount of light detected. We will be using photoresistors to determine the brightness of the light. For a better understanding, have a look at the line following robot, surveillance robot car, obstacle-avoiding robot t hat we previously created.Ī photoresistor, or photocell, is a light-dependent resistor (LDR). In this tutorial, we are going to make a light-chasing robot that moves toward areas of bright light.
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