Module 2

Front

What is a matrix keypad?

Back

An array of buttons on a grid

Front

Which of the following is not a place you should expect to see a keypad: Cell Phones, Microwaves, Door Locks, Computer Keyboard?

Back

Computer Keyboard

Front

What are keypads used for?

Back

To enter passwords and control objects

Front

Which of the following is not a common matrix keypad size? 4x4, 4x3, 4x2, 4x1

Back

4x2

Front

What are the first 4 pins on the keypad for?

Back

Rows

Front

What are the last 4 pins on the keypad for?

Back

Columns

Front

How do matrix keypads work?

Back

Whenever a button is pressed, both the row and column that it is on start sending out current.

Front

What is the list of steps needed to be completed for setting up the keypad?

Back

Add the keypad library
Create variables for rows and columns
Create an array for the matrix
Create a variable for the keypad

Front

What is the code for identifying keypad values?

Back

char key=keypad.getKey();

Front

How do you set up the row constant?

Back

const int Rows = 4;