NEW SI1145 UV IR Visible Sensor I2C Calibrated SI1145 Flora Digital UV Index IR Visible Light Sensor Breakout Board for Arduino
The SI1145 is a new sensor from SiLabs with a calibrated UV sensing element that can calculate UV Index. It’s a digital sensor that works over I2C so just about any microcontroller can use it. The sensor also has visible and IR sensing elements so you can measure just about any kind of light – but only the UV sensor has a calibrated output so if you need precision Lux measurement check out the TSL2561. If you’re feeling really advanced, you can connect up an IR LED to the LED pin and use the basic proximity sensor capability as well.
Vin – this is the input to the voltage regulator. Power with 3-5VDC. Has reverse-polarity protection.
GND – this is the signal and power ground pin, connect to your microcontroller ground pin
3vo – this is the output from the onboard regulator. If you need a clean 3.3VDC, you can draw up to 100mA from this pin.
SCL – this is the i2c clock pin, connect to your microcontroller I2C clock master pin.
SDA – this is the i2c data pin, connect to your microcontroller I2C data master pin.
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