A
Anonymous
Apr 11, 2026
Rating: 4/5
Good value
Does what it says. Pinout could be clearer on the silkscreen but easy to figure out.
Description
Photodiode Module Light Control Switch - 20 Years of Component Expertise
Reviews
Attributes
| Brand | - |
| Category | Electronic Components / Maker DIY / Computer Hardware, Monitors & Peripherals |
| Origin | - |
| Model Number | KY-018 Compatible |
| Operating Voltage | 3.3V - 5V DC |
| Output Signal | Digital Switching Output (TTL) |
| Detection Wavelength | Visible Light Spectrum |
| Pin Interface | 3-Pin / 4-Pin Header |
| PCB Dimensions | 32mm x 14mm |
| Comparator IC | LM393 |
| Sensitivity Control | Potentiometer Adjustable |
| Status Indicator | Red Power LED, Green Output LED |
| Primary Application | Arduino, Raspberry Pi, DIY Electronics |
5 reviews
A
Anonymous
Apr 03, 2026
Rating: 5/5
Great for Arduino projects
Works perfectly with my Uno board. Sensitivity adjustment is smooth and responsive.
A
Anonymous
Mar 04, 2026
Rating: 5/5
Bulk order success
Bought 10 for our club. All working out of the box without issues.
A
Anonymous
Feb 17, 2026
Rating: 5/5
Perfect for thesis
Used this for light intensity logging. Stable readings throughout the experiment.
A
Anonymous
Jan 31, 2026
Rating: 3/5
Okay but sensitive
Works well but very sensitive to ambient light changes. Needs careful calibration.
5 FAQ
Q: Does it measure exact lux values?
A: No, this is a digital switch module, not an analog lux meter.
Q: How do I adjust sensitivity?
A: Use the blue potentiometer on the board with a small screwdriver.
Q: Can it drive a relay directly?
A: No, please use a transistor or driver circuit for relays to ensure safety.
Q: What is the pinout configuration?
A: Standard pins are VCC, GND, and DO (Digital Output). Some versions include AO.
Q: Is this compatible with 3.3V logic?
A: Yes, it operates between 3.3V and 5V DC.
