Ruth's sister GY-302 BH1750FVI light sensor module

Light sensor module for Arduino

The GY-302 module uses the ROHM BH1750FVI chip to measure light intensity from 0 to 65535 lx. A built-in 16-bit AD converter delivers direct digital output over the standard NXP IIC protocol. On-board level conversion allows direct connection to 5 V microcontroller I/O pins. Pins are supplied unwelded and require soldering by the user.

Sustained measurement stability

Continuous readings remain consistent because the sensor’s spectral response matches human visual sensitivity and does not separate ambient components. The integrated 16-bit converter removes the need for repeated calibration or complex software calculations during long logging sessions. Operating voltage stays within the 3-5 V range without external regulation circuitry. This behaviour suits extended data-collection tasks rather than brief spot checks.

Upgrade from basic photoresistor circuits

Replaces simple analog light-dependent resistors that require manual calibration and suffer from non-linear response. The jump is worthwhile when a project needs 1 lux resolution across a 65535 lx span with a standardised IIC interface. Not suited for designs that demand pre-soldered headers, wireless connectivity, or spectral filtering beyond the chip’s native response. Users must provide their own code expansion and circuit research.