Attributes

Brand	-
Category	Robotics / STEM Teaching Tools / Sensors
Origin	-
Operating Voltage	3.3V - 5V DC
Output Type	Digital Switch (DO) & Analog (AO)
Detection Component	High Sensitivity Photodiode
Adjustable Sensitivity	Yes, via Potentiometer
Pin Configuration	3-Pin and 4-Pin Options
Indicator LED	Power and Output Status LEDs
Comparator Chip	LM393 Dual Comparator
Board Dimensions	32mm x 14mm x 5mm
Mounting Hole Diameter	3.0mm
Application Range	Light Control, Robotics, DIY Electronics

6 reviews

Anonymous

Mar 17, 2026

Rating: 5/5

Fast shipping and great performance

Arrived quickly and well-packaged. Tested immediately upon arrival; the LM393 comparator gives a sharp transition between high and low states. Highly recommended for automation tasks.

Anonymous

Mar 17, 2026

Rating: 5/5

Perfect for my Arduino project

This photodiode module worked flawlessly with my Arduino Uno. The sensitivity adjustment is very responsive, allowing me to set the exact light threshold needed for my automatic night light project.

Anonymous

Mar 11, 2026

Rating: 4/5

Good value, clear instructions needed

The sensor itself is high quality and reacts quickly to changes in light. I deducted one star because the pinout wasn't clearly labeled on the board, but a quick multimeter check sorted it out.

Anonymous

Mar 10, 2026

Rating: 5/5

Reliable and compact

I bought five of these for a line-following robot chassis. They are small, lightweight, and provide consistent analog readings. The digital output is also clean with no bouncing.

Anonymous

Mar 09, 2026

Rating: 4/5

Solid component for learning

Used this in a university electronics lab. It's robust enough to handle student handling and provides clear voltage changes. The 3-pin version is slightly easier to wire for beginners.

Anonymous

Mar 02, 2026

Rating: 5/5

Great sensitivity range

Impressed by how well the potentiometer works. You can tune it from detecting bright sunlight to just a dim room lamp. Exactly what I needed for my smart blinds controller.

5 FAQ

Q: Are the mounting holes standard size for M3 screws?

A: The mounting holes are approximately 3.0mm in diameter, which fits M3 screws perfectly for secure installation on your project chassis or breadboard adapters.

Q: Can I connect this directly to a 3.3V microcontroller like ESP32?

A: Yes, the module operates comfortably within the 3.3V to 5V range, making it fully compatible with ESP32, ESP8266, and 3.3V Arduino boards without level shifters.

Q: What is the maximum current this sensor can switch?

A: The digital output is designed for logic signals and should not be used to drive high-current loads directly. Please use a relay or transistor if you need to control motors or high-power lights.

Q: Does this module output analog voltage or just digital signals?

A: This module features both outputs. The AO pin provides an analog voltage proportional to light intensity, while the DO pin provides a digital high/low signal based on your threshold setting.

Q: Is the potentiometer for adjusting brightness threshold or gain?

A: The onboard potentiometer adjusts the reference voltage for the comparator, effectively setting the light intensity threshold at which the digital output switches state.

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