Attributes

Brand	-
Category	Robotics / STEM Teaching Tools / Sensors
Origin	-
Operating Voltage	DC 5V / 12V
Sensor Type	Photoresistor (LDR)
Output Signal	Digital Switching (High/Low)
Detection Range	Adjustable via Potentiometer
PCB Dimensions	32mm x 14mm
Mounting Hole Diameter	3.0mm
Indicator LED	Yes (Power and Trigger Status)
Comparator Chip	LM393
Application	Light Control, Arduino Projects, Robotics
Package Includes	1x Sensor Module, 1x Pin Header

6 reviews

Anonymous

Mar 31, 2026

Rating: 5/5

Perfect for my Arduino night light project

This module works exactly as described. The sensitivity adjustment is very smooth, allowing me to set the exact lux level where the switch triggers. Wiring was straightforward with clear labels for VCC, GND, and DO.

Anonymous

Mar 18, 2026

Rating: 5/5

Compact and efficient

The small footprint fits perfectly into my custom 3D printed cases. Power consumption is negligible, which is great for battery-operated projects. Highly recommended for IoT prototypes.

Anonymous

Mar 12, 2026

Rating: 4/5

Works well for outdoor enclosure testing

Used this to trigger a fan inside a solar box when it gets too bright/hot. It responds quickly to shadows. Just make sure to protect the PCB from direct rain if using outdoors, as it is not waterproof.

Anonymous

Mar 07, 2026

Rating: 5/5

Great for learning electronics

As a beginner, I found this module very forgiving. The potentiometer makes it easy to visualize how light intensity affects the threshold. Documentation online is plentiful for this specific sensor type.

Anonymous

Mar 04, 2026

Rating: 4/5

Good value, easy to use

Solid build quality for the price. I used it with a Raspberry Pi and it detected light changes instantly. The only reason for 4 stars is that the included pins were not soldered, but that's standard for these modules.

Anonymous

Mar 03, 2026

Rating: 5/5

Reliable light detection

I bought five of these for a line-following robot that also needs ambient light sensing. All five units performed consistently. The LM393 comparator provides a clean digital output without jitter.

5 FAQ

Q: Does the package include wires for connection?

A: The package includes the sensor module and a strip of male header pins that you need to solder onto the board yourself. Connection wires (jumper cables) are not included but are commonly available separately.

Q: What is the maximum current this module can switch?

A: The onboard comparator and transistor are designed for signal logic levels, not high power loads. You should use the output to trigger a relay or MOSFET if you intend to control high-current devices like motors or strong lamps.

Q: Can this module output an analog signal?

A: This specific module is designed primarily for digital output (High/Low) via the DO pin. However, some versions of this board layout include an AO pin for analog reading; please check your specific board layout. If only DO is present, it acts as a switch.

Q: How do I adjust the sensitivity?

A: Locate the blue potentiometer on the PCB. Use a small screwdriver to turn it clockwise to increase sensitivity (trigger in lower light) or counter-clockwise to decrease it. Test with a multimeter or LED indicator while changing light conditions.

Q: Is this compatible with 3.3V systems like ESP32?

A: Yes, while the module supports 5V or 12V input, the output logic level generally follows the VCC. For 3.3V systems, it is recommended to power the module at 3.3V if possible, or use a logic level shifter if powering at 5V to ensure safe communication.

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