Light intensity sensor BH1750 - GY-30

This is the BH1750 16-bit Ambient Light sensor from Rohm. Because of how important it is to humans and most other living things, sensing the amount of light in an environment is a common place to get started when learning to work with microcontrollers and sensors. Should we turn up the brightness of our display or dim it to save power? Which direction should your robot move to stay in an area with the most light? Is it day or night? All of these questions can be answered with the help of the BH1750. It's a small, capable and inexpensive light sensor that you can include into your next project to add the detection and measurement of light.

The BH1750 has six different measurement modes which are divided in two groups; continuous and one-time measurements. In continuous mode the sensor continuously measures lightness value. In one-time mode, the sensor makes only one measurement and then goes into Power Down mode.

Each mode has three different precisions:

• Low Resolution Mode - (4 lx precision, 16ms measurement time)
• High Resolution Mode - (1 lx precision, 120ms measurement time)
• High Resolution Mode 2 - (0.5 lx precision, 120ms measurement time)