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Adafruit PCF8575 I2C 16 GPIO Expander Breakout
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The Adafruit PCF8575 GPIO Expander Breakout is an affordable 16-channel I2C GPIO expander that doubles your available digital I/O over a simple two-wire connection. Add extra buttons, LEDs, relays, or other digital peripherals to any microcontroller without using up precious GPIO pins. Like its ...
Adafruit I2C Controlled + Keypad Shield Kit for 16x2 LCD
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The Adafruit I²C Controlled + Keypad Shield Kit lets you drive a 16×2 character LCD and read 5 navigation buttons using only two I²C pins on your Arduino. This frees up the 9+ digital pins that a standard LCD connection would require, while still allowing other I²C devices to share the bus. The ...