EZ-Expander
EZ-Expander Shield for Arduino | Arduino Blog
Low cost Digital and Analog IO Expander Shield | Numato Lab
Adding an MCP23017 I/O Extender to Arduino or ESP8266 - Instructables
Say "Hello" to the LogiSwitch Workbench | Engineering News | Altium News
Using the I2C expander for 16×2 and 20×4 LCD displays – thesolaruniverse
49 MORE PINS PLEASE! PCF8574 Arduino Pin Extender (Easy) - YouTube
2x18 Pin Header for Arduino Mega
PCF8574 GPIO Extender - With Arduino and NodeMCU - Arduino Project Hub
Arduino Stackable Header Kit - R3 - PRT-11417 - SparkFun Electronics
PCF8574 GPIO Extender - With Arduino and NodeMCU - Arduino Project Hub
Is there a way to have more than 14 Output pins on arduino? - Arduino Stack Exchange
EZ-Expander
Add More GPIO Pins to Arduino Projects using Shift Registers
Raspi, Arduino und ESP: GPIO-Pins per Extender erweitern | heise online
PCF8574 & I/O Quick Start
PCF8574 GPIO Extender - With Arduino and NodeMCU : 15 Steps - Instructables
Extender -5Pieces Per Pack – Perintang.com
Seeed Studio Grove-Mega Shield for Arduino Mega 1280/2560 103020027 | RS
Analog input extension shield for Arduino
Arduino Shield List: Liquidware Triangle Extenders
How to Increase the Number of Digital Pins in Arduino (Port Extender)
Analog extender for ESP-8266 and Arduino - YouTube
