BH1750 Digital Light Intensity Lux Sensor Module

The BH1750 Digital Light Intensity Lux Sensor Module is a compact, high-resolution device designed to measure ambient light levels in lux using the I2C communication protocol. Built around the ROHM BH1750FVI chip, this module provides precise and reliable measurements that closely match human eye sensitivity, making it ideal for smart lighting, IoT applications, photography exposure control, and environmental monitoring.

Unlike analog sensors, the BH1750 delivers a direct digital lux reading, eliminating the need for complex calculations or calibration. It operates across a wide dynamic range and is perfectly suited for Arduino, Raspberry Pi, ESP32, and other microcontroller platforms.

🔹 Key Features

• High-Resolution Measurement: Provides lux readings from 1 to 65,535 lux.

• Digital I2C Interface: Simple 2-wire communication with built-in 16-bit ADC.

• Human Eye Sensitivity: Output closely matches visible light perception.

• Low Power Consumption: Ideal for battery-powered and portable devices.

• Compact Size: Easy integration into small enclosures and IoT projects.

• No Calibration Needed: Factory-calibrated for immediate accurate readings.

🔹 Technical Specifications

• Operating Voltage: 3 V – 5 V DC

• Communication: I2C (address 0x23 or 0x5C selectable)

• Measurement Range: 1 – 65,535 lux

• Resolution: 1 lux minimum

• Operating Temperature: –40 °C to +85 °C

• Response Time: ~120 ms typical

• Board Dimensions: ~18 mm × 16 mm

🔹 Applications & Use Cases

• Arduino & Raspberry Pi Projects: Monitor ambient light for smart home automation.

• Smart Lighting Control: Automatically adjust LED brightness based on room light levels.

• Photography & Cameras: Exposure control for digital imaging.

• Greenhouses & Plant Growth: Measure daylight intensity for optimal plant care.

• IoT Environmental Monitoring: Track light conditions for weather stations or wearable tech.

🔹 Advantages for Makers & Engineers

• Fully compatible with Arduino boards and Raspberry Pi mounts and cases.

• Pairs well with other Electronics Components such as temperature and humidity sensors for complete environmental sensing solutions.

• Supported by open-source libraries for fast and easy coding.

🔹 Safety & Precautions

• Avoid exposing the sensor to intense direct sunlight for extended periods to prevent damage.

• Use a regulated Power Supply for stable measurements.

• Handle the PCB carefully to prevent contamination of the sensor window.

🔗 Helpful Internal Links

• More Electronics Components for environmental sensing projects.

• Compatible Arduino and Accessories for seamless integration.

• Assembly aids in Tools and Accessories.

🎥 Video Tutorial

[YouTube tutorial link here]

📝 Product Summary

The BH1750 Digital Light Intensity Lux Sensor Module provides precise, real-time ambient light measurement with a simple I2C interface, making it ideal for Arduino, Raspberry Pi, smart lighting systems, and IoT environmental monitoring projects.