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SparkFun 16 Output I/O Expander Breakout - SX1509 is a 16-channel GPIO expander with an I2C interface – that means with just two wires
GND: Ground
Forward Voltage Max : 1
Two-wire serial interface
LM317T - Adjustable Voltage Regulator RFID Sticker SparkFun 16 Output I/O ExpanderIntroduction : LM317 is an adjustable 3terminal positive voltage regulator capable of supplying in excess of 1. 5 A over an output voltage range of (1. 2 V to 37 V). This voltage regulator is exceptionally easy to use and requires only two external resistors to set the output voltage. Further, it employs internal current limiting, thermal shutdown and safe area compensation, making it essentially blowout proof. The LM317 serves a wide variety of
