Attributes

Brand	-
Category	Robotics / STEM Teaching Tools / Sensors
Origin	-
Operating Voltage	3.3V - 5V DC
Output Type	Digital Switch (DO) & Analog (AO)
Pin Configuration	4-Pin (VCC, GND, DO, AO)
Comparator Chip	LM393
Detection Range	Visible Light Spectrum
Sensitivity Adjustment	Potentiometer Included
PCB Dimensions	32mm x 14mm
Mounting Hole Diameter	3.0mm
Response Time	Microsecond Level
Compatible Platforms	Arduino, Raspberry Pi, ESP32

6 reviews

Anonymous

Mar 31, 2026

Rating: 4/5

Solid performance

The LM393 comparator provides stable readings without much noise. I had to calibrate the potentiometer a few times to get the exact lux level I wanted, but once set, it stays consistent.

Anonymous

Mar 29, 2026

Rating: 5/5

Great addition to robot sensors

Using this on a line-following robot to detect ambient light conditions. It's small, lightweight, and the 4-pin layout makes wiring very straightforward. Highly recommended.

Anonymous

Mar 20, 2026

Rating: 4/5

Good sensitivity, compact size

Very responsive to changes in light intensity. I used it to trigger a relay when the room gets dark. The only minor issue is that the pins are slightly close together, but manageable with care.

Anonymous

Mar 16, 2026

Rating: 5/5

Excellent for learning electronics

Bought this for a university project on automation. The documentation online is plentiful, and the module itself is robust. It detected light changes instantly during our tests.

Anonymous

Mar 05, 2026

Rating: 5/5

Perfect for my smart lighting project

This sensor works flawlessly with my Arduino Uno. The analog output is smooth, and the digital threshold is easy to adjust using the onboard potentiometer. Great value for the price.

Anonymous

Mar 02, 2026

Rating: 5/5

Reliable day/night switch

I integrated this into a solar garden light controller. It consistently turns the LEDs on at dusk and off at dawn. The voltage range fits perfectly with my 5V setup.

5 FAQ

Q: What is the difference between the DO and AO pins?

A: AO (Analog Output) provides a continuous voltage value corresponding to light intensity, while DO (Digital Output) outputs a HIGH or LOW signal based on the threshold set by the potentiometer.

Q: Is this sensor waterproof for outdoor use?

A: No, the PCB and components are not coated or enclosed for water resistance. For outdoor use, you must place it inside a waterproof housing.

Q: How do I adjust the sensitivity of the light detection?

A: There is a blue potentiometer on the board. Rotate it clockwise or counter-clockwise while exposing the sensor to your target light level until the LED indicator toggles as desired.

Q: Can this module be directly connected to a 3.3V microcontroller like ESP8266?

A: Yes, the operating voltage range is 3.3V to 5V, so it is fully compatible with 3.3V logic systems without needing a level shifter.

Q: Does it come with jumper wires?

A: Typically, the module is sold as a standalone board. Jumper wires are usually not included unless specified in the bundle option.

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