Programming Arduino Projects with the PIC Microcontroller: A Line-by-Line Code Analysis and Complete Reference Guide for Embedded Programming in C

© The Author(s), under exclusive license to APress Media, LLC, part of Springer Nature 2022

H. H. WardProgramming Arduino Projects with the PIC Microcontrollerhttps://doi.org/10.1007/978-1-4842-7230-5_7

7. Working with Keypads

Hubert Henry Ward¹  

(1)

Leigh, UK

 

In this chapter, we will program two types of keypads to provide us with security on entry to our house or room. The first keypad will be a 3-by-4 pad using the more traditional type keys on them. A typical board is shown in Figure 7-1.

Figure 7-1

The traditional keypad board

The other keyboard is the slimmer membrane type and is a 4-by-4 keypad. This is shown in Figure 7-2.

Figure 7-2

The 4 × 4 membrane ...