Attributes

Brand	-
Category	Robotics / STEM Teaching Tools / Sensors
Origin	-
Operating Voltage	5V DC
Output Signal	Digital Switching Output (0 and 1)
Comparator Chip	LM393
Sensitivity Adjustment	Via Potentiometer
PCB Size	3.2cm x 1.4cm
Mounting Hole Diameter	3mm
Compatible Boards	Arduino, Raspberry Pi, STM32, ESP8266
Indicator LED	Power and Digital Switch Output
Application Scope	Light detection, Robotics, Smart Home Projects
Package Contents	1x Photosensitive Resistor Module

6 reviews

Anonymous

Mar 27, 2026

Rating: 5/5

Great for learning electronics

I bought this for a university project on smart lighting systems. The LM393 comparator makes the digital output very stable. Documentation online is plentiful, making it easy to find code examples.

Anonymous

Mar 19, 2026

Rating: 5/5

Plug and play simplicity

As someone new to MCU development, I appreciated how straightforward this module is. VCC, GND, and DO pins are clearly labeled. It responded immediately to changes in room lighting.

Anonymous

Mar 16, 2026

Rating: 5/5

Kids love the light tracking project

Used this to teach my kids how sensors work. We built a simple bug that runs towards the flashlight. The module is robust enough to handle a bit of clumsy wiring from beginners.

Anonymous

Mar 16, 2026

Rating: 4/5

Good value, easy to integrate

Solid build quality for the price. It took me less than 10 minutes to wire it up and get readings in my serial monitor. The only reason I didn't give 5 stars is that the pin headers were slightly loose, but a quick solder fixed it.

Anonymous

Mar 11, 2026

Rating: 4/5

Reliable digital output

Works well for binary light detection (on/off). If you need analog values, remember this board outputs digital signals based on the threshold you set. For my automated curtain project, it is exactly what I needed.

Anonymous

Mar 04, 2026

Rating: 5/5

Perfect for my Arduino robot

This sensor works flawlessly with my Arduino Uno. The sensitivity adjustment via the potentiometer is very precise, allowing me to set the exact light threshold needed for my line-following robot. Highly recommended for beginners.

5 FAQ

Q: Is the potentiometer sensitive enough for fine-tuning?

A: Yes, the onboard blue potentiometer offers good resolution for adjusting the sensitivity. You can use a small screwdriver to make precise adjustments until the indicator LED triggers at your desired light level.

Q: Does this module provide an analog output signal?

A: This specific module provides a digital switching output (0 or 1) based on the threshold you set with the potentiometer. It does not expose the raw analog signal from the photoresistor directly on the main output pin.

Q: Do I need to install any drivers to use this?

A: No drivers are required. This is a hardware module that interfaces directly with the GPIO pins of your microcontroller. You only need to write or upload code to read the digital state of the pin.

Q: What is the detection range in meters?

A: The detection range depends heavily on the ambient light conditions and the intensity of the light source. Typically, it is effective for detecting direct light sources or shadows within a range of 10cm to 50cm for most hobby projects.

Q: Can I use this with a 3.3V microcontroller like ESP32?

A: Yes, you can. While the module is rated for 5V, it generally works fine with 3.3V logic levels. However, for optimal stability, powering it with 3.3V is recommended if your MCU cannot handle 5V inputs on its GPIO pins.

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