Digital LDR Module

The Digital LDR Module is a reliable sensor designed to detect ambient light levels and deliver accurate digital signals. To begin with, this module outputs a HIGH signal when exposed to light and a LOW signal in darkness. Therefore, it is ideal for building automatic lighting systems or environmental monitoring setups using any  MCUs, SBCs, or embedded CPU systems.

Moreover, the onboard LDR (Light Dependent Resistor) senses changes in brightness effectively. Because of the integrated potentiometer, you can fine-tune the light sensitivity threshold with ease. As a result, it adapts well to indoor and outdoor lighting conditions.

In addition, the module features a built-in power LED and a status LED, which offer visual indicators during operation. Thanks to its simple digital output, it communicates effortlessly with most MCUs or development platforms without needing analog-to-digital conversion.

Furthermore, it includes an M3 mounting hole, allowing for easy attachment to any chassis or panel. Whether you’re building a smart lamp, night-activated garden light, or light-following robot, this module offers outstanding flexibility and control.

Not only is it compact and easy to use, but it also operates efficiently in real-world applications. Overall, the Digital LDR Module is a must-have tool for students, developers, and anyone building intelligent light-aware systems.

How it works

1. Module light conditions or light intensity reach the set threshold, DO port output high when the external ambient light intensity exceeds a set threshold, the module D0 output low;
2. Digital output D0 directly connected to the MCU, and detect high or low TTL, thereby detecting ambient light intensity changes;
3. Digital output module DO  can directly drive the relay module, which can be composed of a photoelectric switch.

Pin details

VCC ↔ 3.3V to 5V DC.
GND ↔ Ground.
DO ↔ Digital Output.

Features :

1. LM393 based design.
2. It can detect ambient brightness and light intensity.
3. Adjustable sensitivity (via blue digital potentiometer adjustment).
4. Output Digital – 0V to 5V, Adjustable trigger level from preset.
5. LEDs indicating output and power.

Package Includes :

1 x LDR Module.