UV Index / IR / Visible SI1145 Digital Light Sensor
Knowing if it is safe to go out and be under the sun in the afternoon means a lot. So if you want to check out the ultraviolet index reading at a particular time, you don't have to buy a UV Index meter. You could make one for yourself.
The SI1145 is a low-power, reflectance-based, infrared proximity, ultraviolet (UV) index, and ambient light sensor. This sensor can be powered with 3V to 5V. You could use its IR feature by adding an IR LED with a spectrum wavelength of 550nm to 1000nm. Its visible light spectrum wavelength is at 400nmn to 800nm. It can operate within the temperature of -40°C to 85°C. This sensor could be used under dark glass covers.
Interface this with your Arduino by using the I2C pins (SDA/SCL) plus the power supply (VCC/GND). The IR Spectrum has a wavelength of 550nm to 1000nm which is centered on 800nm. The visible light spectrum has a wavelength of 400nm to 800nm which is centered on 530nm.
- 20mm x 18mm x 2mm
- Weight: 1.4g