Light Sensor Circuit

The light sensors circuit is electronic circuit that functions to sense changes in light intensity into electrical signals. Level sensor sensitivity can be obtained from setting the value of signal amplification in the circuit. The series of light sensors can result in two possibilities, that is active during the dark and active during the light.

Typically the sensor component used in the circuit of light sensor is a Light Dependent Resistor (LDR). LDR has a resistance that can vary according to level of intensity of light falling on it.



Light sensors circuits are often used to control garden lighting. Park lights will typically turn on automatically when night falls and turns off automatically during daylight.

Here are some examples of simple light sensor circuits:

Light sensor circuit

Light sensor circuit 1

Light sensor circuit 2

Light sensor circuit 3

Light sensor circuit 4

Simple light sensor circuit

LDR

Examples of light sensors circuit on top of actually having the same working principle. Changes in the intensity of light received by the LDR will alter the magnitude of the voltage that falls on ldr, which in turn would trigger a transistor voltage at the load circuit.



Light sensor circuit in Indonesian