Overview
In this lesson, you will learn how to use the matrix keyboard.
Components Required
Name
UNO R3 or MEGA 2560
Male to Male DuPont Wire
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.
Lesson 23 4*4 Matrix Keyboard
Qty
1
8
1
2
4
5
7
8
*
0
Name
4*4 Matrix Keyboard
3
A
6
B
9
C
#
D
interface
Qty
1
58
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