Description
Reviews
| Brand | - |
| Category | Robotics / STEM Teaching Tools / Sensors |
| Origin | - |
| Operating Voltage | DC 3.3V - 5V |
| Output Type | Digital Switch (DO) & Analog (AO) |
| Detection Component | LDR Photoresistor |
| Comparator Chip | LM393 |
| Sensitivity Adjustment | Potentiometer Included |
| Pin Configuration | 4-Pin (VCC, GND, DO, AO) |
| PCB Dimensions | 32mm x 14mm |
| Mounting Holes | 3.0mm Diameter |
| Indicator LED | Power and Output Status |
| Application Compatibility | Arduino, Raspberry Pi, ESP32 |
Anonymous
Mar 25, 2026
Rating: 5/5
Perfect for my automatic night light project
This sensor module works exactly as described. The potentiometer makes it very easy to calibrate the sensitivity threshold. I connected it to an Arduino Uno and had it reading light levels within minutes. Great value for the price.
Anonymous
Mar 21, 2026
Rating: 5/5
Reliable and responsive
I bought five of these for a robotics project. All five units performed consistently with no dead-on-arrival issues. The response time to light changes is quick enough for most hobby applications. Highly recommended.
Anonymous
Mar 09, 2026
Rating: 4/5
Good quality, clear instructions needed
The hardware quality is solid and the soldering points are clean. However, beginners might struggle slightly without a pinout diagram included in the package. Once I found a guide online, it worked flawlessly for my garden lighting system.
Anonymous
Mar 07, 2026
Rating: 5/5
Great for greenhouse monitoring
Using this to monitor sunlight exposure in my smart greenhouse setup. It handles the humidity well inside the protective case I built. The voltage range is flexible enough to run off my 3.3V ESP8266 board directly.
Anonymous
Mar 04, 2026
Rating: 5/5
Easy to use for beginners
As someone new to electronics, I was worried this would be too complex. It turned out to be very straightforward. The digital output makes logic simple: high or low based on light. The analog output is a nice bonus for more granular data.
Anonymous
Mar 02, 2026
Rating: 4/5
Solid component, small form factor
The size is compact which fits well into my enclosure. The only reason for 4 stars instead of 5 is that the mounting holes are a bit tight for standard M3 screws, but they work if you are careful. Functionality is top-notch.
Q: Does this come with jumper wires for connection?
A: No, the package includes only the sensor module. Jumper wires are sold separately, but standard female-to-female Dupont wires work perfectly.
Q: What is the difference between the DO and AO pins?
A: DO (Digital Output) provides a HIGH or LOW signal based on your threshold setting, while AO (Analog Output) provides a variable voltage representing the exact light intensity detected.
Q: How do I adjust the sensitivity of the light detection?
A: There is a blue potentiometer on the board. Turn it clockwise or counter-clockwise while exposing the sensor to your target light level until the indicator LED triggers as desired.
Q: Can this module be powered directly by a 3.3V microcontroller?
A: Yes, the operating voltage range is DC 3.3V to 5V, so it is fully compatible with 3.3V systems like the ESP32 or ESP8266.
Q: Is the LM393 chip replaceable if it gets damaged?
A: Yes, the LM393 is a standard comparator IC in an SOP-8 package and can be replaced with proper soldering skills if necessary.
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