Description
Reviews
| 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 |
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.
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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