Circuit Diagram Used To Measure The Resistance Of An Ldr. The ldr symbol and its pictorial relationship with light and resistance is shown below. Ldr is a photoresistor is a light controlled variable resistor.
Ldr switch circuit diagrams. An ldr or a photoresistor is a device that is made up of high resistance semiconductor material. Hook up the circuit shown in the above diagram using an arduino uno or adapt it to any dev board with an analog input.
The basic symbol of the light dependent resistor consists of a rectangle which symbolizes the resistor s function of the ldr.
Ldr is a photoresistor is a light controlled variable resistor. The resistance of a photoresistor decreases with increasing incident light intensity in other words it exhibits photoconductivity. Adjust vr1 for light sensitive. This article gives an overview of what is ldr light dependent resistor circuit and its working.
