Interfacing an LDR with Arduino using Analog Input

Interfacing an LDR (light-dependent resistor) with an Arduino using an analog input:

In this program, we are using the analogRead() function to read the analog value from an LDR connected to the A0 pin of the Arduino board. The program then prints the LDR value to the serial monitor every second.

Practical Example:

One practical example of using this program is to automatically turn on a light when the ambient light level in a room falls below a certain threshold. By connecting an LDR to the A0 pin of the Arduino board and using the above program, the Arduino can measure the light intensity in the room and trigger a relay or a solid-state switch to turn on a light when the light intensity falls below a certain level. This type of system can be useful in areas such as outdoor lighting or indoor lighting for energy conservation.