ELECFREAKS Octopus Light Sensor Module - Photoresistor LDR for micro:bit Arduino Raspberry Pi

The ELECFREAKS Octopus Light Sensor Module is a high-quality analog light sensor based on a photoresistor (LDR). Designed for the Octopus series, it provides accurate ambient light detection for educational and prototyping projects. Compatible with micro:bit, Arduino, Raspberry Pi, ESP32, and STM32, this sensor module features a standard 3-pin GVS interface and operates at 3.3V-5V DC.

Advantages

Easy to integrate with any microcontroller thanks to the 2.54mm pitch header and analog voltage output. The sensor's fast response time and wide light sensitivity range make it ideal for smart lighting, robotics, and environmental monitoring. Low power consumption ensures suitability for battery-powered projects.

Suitable for

• Ambient light detection and measurement
• Smart lighting systems (automatic brightness control)
• Robotics (line following, obstacle avoidance with light)
• Educational STEM projects and experiments
• IoT and home automation applications

Key specifications

• Sensor Type: Photoresistor (LDR)
• Output Type: Analog Voltage (0V to VCC)
• Operating Voltage: 3.3V - 5V DC
• Interface: 3-pin GVS (Ground, VCC, Signal)
• Compatibility: micro:bit, Arduino, Raspberry Pi, ESP32, STM32
• Detection Principle: Resistance varies with light intensity
• Light Sensitivity: High (wide range)
• Response Time: Fast
• Operating Temperature: -20°C to 85°C
• Mounting Holes: 2x M3
• Connector Type: Standard 2.54mm pitch 3-pin header
• Material: FR-4 PCB, Electronic Components
• Current Consumption: Low (typically a few mA)
• Included Components: Photoresistor, Resistor, PCB, Header Pins

Recommendations

For best results, use with a microcontroller's analog input pin. The output voltage decreases as light intensity increases (inverse relationship with resistance). Suitable for both indoor and outdoor use within the specified temperature range.