BH1750 Light Intensity Sensor Module

BH1750 Light Intensity Sensor Module 

The BH1750 Light Intensity Sensor Module is a digital ambient light sensor that measures light intensity in lux (lx), simulating the human eye’s response to light. It uses the BH1750FVI IC from ROHM Semiconductor and communicates with microcontrollers via the I²C (TWI) interface, allowing easy integration with boards such as Arduino, ESP32, and Raspberry Pi.

Unlike analog sensors, the BH1750 outputs a digital signal directly, eliminating the need for complex ADC conversions. It provides high precision and low power consumption, making it suitable for applications like automatic lighting control, display brightness adjustment, and environmental monitoring.

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Features

• Digital Light intensity detection module: GY-30 Chip : BH1750FVI
• Power supply: 3V-5V power
• Light range 0-65535 lx
• Sensor built-in : 16 bitAD converter
• Direct digital output, bypassing the complex calculation, bypassing the calibration
• Don’t distinguish between ambient light
• Close to the spectral characteristics of visual acuity
• widely use to 1-lux high precision measurement
• Standard NXP I2C communication agreement
• Low Current by power down function * 50Hz / 60Hz Light noise reject-function
• Light source dependency is little. ( ex. Incandescent Lamp. Fluorescent Lamp. Halogen Lamp. White LED. Sun Light)
• Small measurement variation ( +/- 20%).

Applications

• Smart lighting and automatic brightness control
• Ambient light detection in mobile devices and displays
• Environmental monitoring systems
• Home automation and IoT projects
• Solar energy management systems
• Photography exposure measurement