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Simulate a matrix keypad with a microcontroller - Page 1
How to Interface 4x4 Matrix Keypad with LPC2148- (Part 6/9)
4x4 Matrix Keypad Interfacing with PIC Microcontroller PIC16F877A
Use a Keypad with Your Arduino
How to use Matrix Keypad
Matrix Keypad Interfacing with Arduino | Circuits4you.com
Keypad Interfacing with 8051 Microcontroller (AT89S52)
[CPJexc]How to use 3×4 key matrix(keypad) for PC control – exInterface.com
Using I2C with a 4×4 Matrix Keypad - Maker and IOT Ideas