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Lesson 23 4*4 Matrix Keyboard
Overview
In this lesson, you will learn how to use the matrix keyboard.
Components Required
Name Qty Name Qty
UNO R3 or MEGA 2560 1 4*4 Matrix Keyboard 1
Male to Male DuPont Wire 8
Component Introduction
This 16-button keypad provides a useful human interface for micro-
controller projects. The convenient adhesive backing provides a simple way
to mount the keypad in varies applications.
Schematic of 4x4 matrix keyboard shows in the following picture.
1 2 3 A
4 5 6 B
7 8 9 C
* 0 # D
interface
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7
6
5
4
3
2
1
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