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 a simple project to control a laser security system with Arduino. The laser is controlled by an ATmega32 which enables the laser to blink at a certain rate. This laser is sensed by an LDR ...

Block Diagram 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 ...

Quick Start: IR Sensor With Arduino Code in 5 Minutes For experienced users, here's the essential IR sensor with Arduino setup: Connect VCC to 5V, GND to Ground, OUT to pin D9 Upload the Arduino IR ...