BH1750 Digital Light Intensity Sensor Module

The BH1750 Digital Ambient Light Sensor is a high-precision light intensity sensor commonly used in mobile phones, Arduino, Raspberry Pi, and other microcontroller projects to automatically adjust screen brightness based on ambient lighting. With a built-in 16-bit A/D converter, the sensor provides direct digital output, eliminating the need for complex calculations or calibration. It can accurately measure light levels from 1 to 65535 lux (lx), making it ideal for both hobbyist and professional electronics projects.

Pin Configuration of BH1750 Sensor

• Pin 1 (VCC): Power supply for the module (2.4V to 3.6V, typically 3.0V)
• Pin 2 (GND): Ground of the module, connected to the circuit ground
• Pin 3 (SCL): Serial Clock Line for I2C communication
• Pin 4 (SDA): Serial Data Line for transferring data via I2C
• Pin 5 (ADDR): Device address pin for selecting module address when multiple sensors are connected

Features of BH1750 Light Sensor

• Power Supply: 2.4V – 3.6V (typically 3.0V)
• Low current consumption: 0.12mA
• Measuring Range: 1 – 65535 lux
• Communication: Standard I2C (NXP) interface
• Accuracy: ±20%
• Built-in 16-bit A/D converter for direct digital output
• Minimal interference from IR radiation
• Responsive to light similar to human eye perception
• Compact size: 3.2cm × 1.5cm
• Direct digital output, no complex calculations or calibration required
• Widely used for high-precision ambient light measurements

Applications

• Automatic screen brightness control for mobile devices and displays
• Arduino and Raspberry Pi light sensing projects
• Environmental light monitoring systems
• Industrial and hobbyist electronics requiring precise lux measurements