To use a dark sensor instead, connect LM358 ‘s pin 7 of to one of Arduino’s digital I/O pins. As a dark sensor, the circuit will output as HIGH when it’s dark and a LOW when there’s light. The output ...

Connect the A0 pin of the Arduino to the same column where the LDR and resistor is connected (Since the LDR gives out an analog voltage, it is connected to the analog input pin on the Arduino. The ...

This is an Arduino library for interfacing with an LDR (Light Dependent Resistor) sensor. With this library, you can easily read the analog value of an LDR sensor connected to your Arduino board. To ...

Figure 1 shows the block diagram of a dual axis solar tracker. 4 LDR sensors are placed adjacent to the solar panel and will be activated when light is detected. An activate signal will be sent to the ...