Expand your project possibilities with the Adafruit PCF8574 GPIO Expander Breakout, an affordable 8-channel I2C expander. Connect it over I2C to control GPIO pins for reading and writing, without needing more GPIO from your board.Benefits include: * Cost-effective with 8 I/O pins * Three I2C address select jumpers for up to 64 total GPIO * Open-drain output with 100K resistor pull-up built-in * Light pull-up inputs and strong 20mA low-driving transistor sink output Use it to read buttons or switches by connecting them to ground, or control LEDs by linking them to positive voltage through a resistor. Achieve effortless GPIO output logic levels or receive input logic levels by configuring the pins accordingly.Compatible with Arduino and CircuitPython through dedicated libraries that simplify input/output modes. It fits seamlessly in your setup with the custom-made PCB in STEMMA QT form factor, ensuring easy integration with other sensors and accessories via compatible cables. https://elecena.pl/product/29479589/adafruit-pcf8574-i2c-gpio-expander-breakout 2025-11-03 https://elecena.pl/product/29479589/adafruit-pcf8574-i2c-gpio-expander-breakout 2025-12-04 https://elecena.pl/product/29479589/adafruit-pcf8574-i2c-gpio-expander-breakout 2025-12-20 https://elecena.pl/product/29479589/adafruit-pcf8574-i2c-gpio-expander-breakout 2026-01-24 https://elecena.pl/product/29479589/adafruit-pcf8574-i2c-gpio-expander-breakout 2026-01-29 https://elecena.pl/product/29479589/adafruit-pcf8574-i2c-gpio-expander-breakout 2026-02-01 https://elecena.pl/product/29479589/adafruit-pcf8574-i2c-gpio-expander-breakout 2026-03-15 https://elecena.pl/product/29479589/adafruit-pcf8574-i2c-gpio-expander-breakout 2026-03-18 https://elecena.pl/product/29479589/adafruit-pcf8574-i2c-gpio-expander-breakout 2026-04-08 https://elecena.pl/product/29479589/adafruit-pcf8574-i2c-gpio-expander-breakout 2026-04-15 https://elecena.pl/product/29479589/adafruit-pcf8574-i2c-gpio-expander-breakout 2026-04-25