Datasheet

Pinouts

The TSL2591 is a I2C sensor. That means it uses the two I2C data/clock wires available on

most microcontrollers, and can share those pins with other sensors as long as they don't

have an address collision. For future reference, the I2C address is 0x29 and you can't

change it!

Power Pins:

Vin - this is the power pin. Since the chip uses 3 VDC, we have included a voltage

regulator on board that will take 3-5VDC and safely convert it down. To power the

board, give it the same power as the logic level of your microcontroller - e.g. for a 5V

micro like Arduino, use 5V

3vo - this is the 3.3V output from the voltage regulator, you can grab up to 100mA

from this if you like

GND - common ground for power and logic

(http://adafru.it/dGy)I2C Logic pins:

SCL - I2C clock pin, connect to your microcontrollers I2C clock line.