49 MORE PINS PLEASE! PCF8574 Arduino Pin Extender (Easy) - YouTube
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PCF8574 GPIO Extender - With Arduino and NodeMCU | Arduino | Maker Pro
Add More GPIO Pins to Arduino Projects using Shift Registers
Arduino 74HC165 Interfacing: Increase Input Pins - The Engineering Projects
Is there a way to have more than 14 Output pins on arduino? - Arduino Stack Exchange
Arduino - Arduino Uno (R3) - ShareTechnote
Increase Analog Pins for NodeMCU using 16-Channel Analog Multiplexer Module – A blog about DIY solar and arduino projects
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How to use more GND/VCC pin on Arduino | Arduino FAQs
How To MUX Arduino Inputs & Outputs | Arduino Multiplexer - YouTube
Shift Registers - 74HC595 & 74HC165 with Arduino
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Funny Electronics: Arduino - ShiftOut, Extend Output Pins on Arduino With Shift Register 74HC595
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