Attributes

Brand	-
Category	Root / Electronic Components / Maker DIY
Origin	-
Brand	Generic / OEM
Model Number	KY-018 Compatible
Operating Voltage	3.3V - 5V DC
Output Type	Analog (AO) & Digital (DO)
Comparator Chip	LM393
Pin Configuration	3-Pin or 4-Pin Header
PCB Dimensions	32mm x 14mm
Weight	3g
Wire Length	Approx. 20cm
Condition	New

5 reviews

Anonymous

Mar 18, 2026

Rating: 5/5

Great for Arduino projects

Works perfectly with my Uno. Easy to adjust sensitivity using the potentiometer. Included wires were a nice touch.

Anonymous

Mar 09, 2026

Rating: 4/5

Good value

Works well for the price. Wires could be slightly longer but overall satisfied with the performance.

Anonymous

Feb 23, 2026

Rating: 5/5

Beginner friendly

Clear labeling on the board helped me learn analog inputs. Great starter component for students.

Anonymous

Feb 19, 2026

Rating: 5/5

Reliable light sensor

Used it for a night light project. Very responsive to changes in room lighting. Digital output is crisp.

Anonymous

Jan 17, 2026

Rating: 4/5

Solid component

One module was slightly loose in the header but works fine after tightening. Good sensitivity range.

5 FAQ

Q: Is example code included in the package?

A: No physical code is included, but many free examples exist online for Arduino and Raspberry Pi.

Q: Can I use this sensor outdoors?

A: It is not waterproof. Please enclose it in a protective case for outdoor use.

Q: How do I adjust the sensitivity threshold?

A: Use a small screwdriver to turn the blue potentiometer on the board until the LED indicator behaves as desired.

Q: What is the difference between 3-pin and 4-pin versions?

A: The 4-pin typically separates AO and DO clearly, while 3-pin may share ground differently. Both function similarly.

Q: Does this work with 3.3V logic boards like ESP32?

A: Yes, it operates comfortably between 3.3V and 5V DC.

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