Description
Reviews
| Brand | - |
| Category | Robotics / STEM Teaching Tools / Sensors |
| Origin | - |
| Operating Voltage | 3.3V - 5V DC |
| Output Signal | Digital Switching Output (0 and 1) |
| Detection Component | High-quality Photoresistor |
| Comparator Chip | LM393 |
| Sensitivity Adjustment | Potentiometer included |
| PCB Size | 32mm x 14mm |
| Mounting Holes | 3mm diameter |
| Response Time | Microsecond level |
| Indicator LED | Power and Trigger status LEDs |
| Application Scope | Arduino, Raspberry Pi, DIY Electronics |
Anonymous
Mar 21, 2026
Rating: 4/5
Good value, clear instructions needed
The hardware quality is solid and the LM393 chip is reliable. However, beginners might struggle slightly without a wiring diagram in the package. Once connected correctly, it performs well.
Anonymous
Mar 19, 2026
Rating: 5/5
Perfect for my Arduino project
This sensor module works exactly as described. The sensitivity potentiometer makes it very easy to calibrate for different lighting conditions. I used it for a night-light automation project and it triggered reliably every time.
Anonymous
Mar 12, 2026
Rating: 5/5
Fast response time
I tested this against a more expensive brand, and the response time is virtually identical. Great for detecting rapid changes in light intensity. Highly recommended for robotics applications.
Anonymous
Mar 06, 2026
Rating: 5/5
Great for school projects
Bought five of these for a class project. All of them worked out of the box. The digital output makes interfacing with microcontrollers very simple compared to analog sensors.
Anonymous
Mar 03, 2026
Rating: 4/5
Solid build quality
The PCB looks clean and the soldering is neat. The only reason for 4 stars instead of 5 is that the mounting holes are a bit tight for standard screws, but it's a minor issue.
Anonymous
Mar 02, 2026
Rating: 5/5
Reliable light detection
Using this to trigger a camera trap at dusk. It has been working consistently for two weeks now without any false triggers. Very happy with the purchase.
Q: Can I connect this directly to a 3.3V microcontroller like ESP32?
A: Yes, the module operates within a 3.3V to 5V range, so it is fully compatible with 3.3V logic systems like the ESP32 or Raspberry Pi GPIO pins.
Q: Does this module output analog or digital signals?
A: This module provides a digital switching output (0 or 1). If you need an analog reading of light intensity, you would need to use the photoresistor directly or look for a specific analog version.
Q: What is the maximum current this module can handle?
A: The output pin is designed for signal logic levels and should not be used to drive high-current loads directly. Please use a transistor or relay module if you need to switch higher power devices.
Q: How do I adjust the sensitivity?
A: There is a blue potentiometer on the board. Turn it clockwise to decrease sensitivity (requiring darker conditions to trigger) or counter-clockwise to increase sensitivity.
Q: Is the photoresistor replaceable if it breaks?
A: Yes, the photoresistor is through-hole soldered, so it can be desoldered and replaced with a standard LDR if damaged, though they are quite durable under normal use.
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