How to Make PCF8574 Module

PCF8574 I2C GPIO Expander Tutorial

Add more pins to your Arduino/ESP8266 board using PCF8574T module

PCF8574 GPIO Extender - With Arduino and NodeMCU

How to Use I2C LCD with Arduino | Very Easy Arduino LCD I2C Tutorial | Arduino 16x2 LCD I2C Tutorial

PCF8574-H36 | I2C PCF8574 PCF8574T Communication Module I/O Expa

Not enough Arduino Pins? Try this I2C Port Expander! | Chip Tips #1: PCF8574

Practical Guide to PCF8574: Adding Extra Pins for Arduino

Serial LCD I2C Module with chip PCF8574

How to I2c LCD Module using Old Circuit Board | DIY Arduino I2c LCD Module | PCF8574 Module

PCF8574 GPIO Extender | Arduino (No Libraries)

How to Use PCF8574 GPIO Extender With Arduino or ESP32

PCF8574 final revision assembly speedup

8 Channel relay module I2C PCF8574 expander 3.3V 5.0V Arduino Raspberry ESP8266

#49 MORE PINS PLEASE! PCF8574 Arduino Pin Extender (Easy)

LCD via I2C in STM32 || CUBEIDE || PCF8574

PCF8574 I2C LCD | Connecting an LCD Display to Arduino using I2C Adapter | I2C LCD Display

HariFun #133 - 8 LEDs, 8 Buttons, just 2 Arduino pins!

Expand your GPIO! PCF8574 & MCP23008

I2C Module interface with LCD and Arduino \ PCF8574 - I2C module \ E Infotainment

😺 64 x Relays + 8 x pcf8574 + 4 x Wire Bus (I²C) + 1 Arduino

16-key keypad with an Arduino and a PCF8574 I/O expander module

EB_#530 Mini-Plaquette - Expansion GPIO par puce PCF8574

IO Pins am ESP8266 erweitern mit dem PCF8574 Erweiterungsmodul

I2C LCD with Arduino | convert a SPI LCD to I2C with PCF8574