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Home / Computer Hardware, Monitors & Peripherals / Photoresistor Module Brightness Photoelectric Light Detection Sensor Light-Controlled Switch 3.3V-5V 3-Pin/4-Pin

Attributes

Brand -
Category Electronic Components / Maker DIY / Computer Hardware, Monitors & Peripherals
Origin -
Operating Voltage 3.3V - 5V DC
Output Signal Digital Switch Output (DO) & Analog Output (AO)
Pin Count 3-Pin or 4-Pin Configuration
Comparator Chip LM393 Voltage Comparator
Detection Range Ambient Light Variations
PCB Size 32mm x 14mm
Mounting Hole Diameter 3mm
Indicator LED Power LED & Output Status LED
Sensitivity Adjustment Blue Potentiometer Trim
Microcontroller Compatibility Arduino, Raspberry Pi, ESP32, STM32

5 reviews

A

Anonymous

Mar 24, 2026

Rating: 5/5

Perfect for my Arduino night light

Worked exactly as expected. The potentiometer makes it easy to set the threshold for turning on the LED.

A

Anonymous

Mar 19, 2026

Rating: 5/5

Great for school projects

Bought these for a class project on automation. Very responsive to light changes.

A

Anonymous

Mar 06, 2026

Rating: 5/5

Reliable and cheap

I've used these in multiple prototypes. They hold up well and the soldering points are solid.

A

Anonymous

Feb 21, 2026

Rating: 4/5

Good sensor, clear instructions needed

The module itself is great quality. Just make sure you check the pinout for your specific board version.

A

Anonymous

Feb 18, 2026

Rating: 5/5

Sensitive enough for outdoor box

Using this inside a weatherproof box to detect day/night cycles. Works perfectly.

5 FAQ

Q: What is the maximum current draw?

A: The module typically draws around 10-20mA depending on the LED indicator status.

Q: Does this provide analog output or just digital?

A: This module provides both. AO gives analog voltage based on light intensity, DO gives a digital high/low signal.

Q: Can I connect this directly to a 5V Raspberry Pi?

A: Yes, but ensure you check the logic levels. It operates on 3.3V-5V, so it is compatible with most Pi GPIO pins.

Q: Is the photoresistor replaceable if it breaks?

A: It is soldered onto the PCB. While technically replaceable with soldering skills, we recommend handling with care.

Q: Does it work with ESP8266?

A: Yes, the ESP8266 operates at 3.3V which is within the operating range of this sensor module.

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