Description
Reviews
| Brand | - |
| Category | Robotics / STEM Teaching Tools / Sensors |
| Origin | - |
| Model Number | KY-018 Compatible |
| Operating Voltage | 3.3V - 5V DC |
| Interface Type | Analog Output (AO) |
| Sensing Element | Cadmium Sulfide Photoresistor |
| PCB Dimensions | 32mm x 14mm x 5mm |
| Mounting Hole Diameter | 3mm |
| Pin Configuration | 3-Pin Header (GND, VCC, OUT) |
| Response Time | < 30ms |
| Compatibility | Arduino, Raspberry Pi, ESP32 |
| Package Weight | 2.5 grams |
Anonymous
Mar 30, 2026
Rating: 5/5
Great for beginners
I am new to electronics and this module made it very easy to understand how light sensors work. Plenty of tutorials online work with this specific layout.
Anonymous
Mar 26, 2026
Rating: 5/5
Reliable replacement part
Needed a replacement for a broken KY-018 sensor and this fit the bill perfectly. Pinout matches standard modules. No issues with calibration.
Anonymous
Mar 18, 2026
Rating: 4/5
Good sensitivity, compact size
The sensor is very responsive to changes in light levels. It fits perfectly on my breadboard. Only giving 4 stars because the included pins were slightly bent, but easily fixed.
Anonymous
Mar 14, 2026
Rating: 4/5
Solid performance
Used this in a line-following robot prototype. It detects light gradients well. Would prefer if it came with a digital output option too, but analog works fine for my needs.
Anonymous
Mar 07, 2026
Rating: 5/5
Perfect for Arduino light projects
This module works exactly as described. I used it to build a simple night light controller with my Arduino Uno. The analog output is stable and easy to read. Great value for the price.
Anonymous
Mar 04, 2026
Rating: 5/5
Fast shipping, works great
Arrived quickly and was well packaged. Tested immediately upon arrival and the resistance changes smoothly with light exposure. Highly recommended for sensor kits.
Q: Is there a potentiometer on the board to adjust sensitivity?
A: This specific photoresistor module provides a raw analog output and does not include an onboard potentiometer for threshold adjustment like some digital modules do.
Q: Does this module come with male header pins pre-soldered?
A: No, the module typically comes without headers soldered to allow flexibility for breadboard use or custom wiring. You will need to solder them yourself.
Q: Can I connect this directly to a 5V Raspberry Pi GPIO?
A: While the module operates at 5V, the Raspberry Pi GPIO pins are 3.3V logic. You should use a voltage divider or level shifter for the output pin to avoid damaging the Pi.
Q: Is this compatible with the ESP8266 NodeMCU?
A: Yes, it is fully compatible. You can connect the VCC to 3.3V or VIN, GND to GND, and the AO pin to any available analog input pin on the NodeMCU.
Q: What is the maximum light intensity this can measure?
A: This is an analog sensor providing relative light levels rather than a specific Lux rating. It works best for distinguishing between dark, dim, and bright environments.
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