5PCS 4x3 Matrix Array Keypad 4*3 Switch Keyboard 12 Keys Module for Arduino MCU
Description:
100% brand new and high quality.
12 Button Matrix
100% brand new and high quality.
12 Button Matrix
0-9 # *
Excellent price-performance ratio
Easy communication with any microcontroller
This high quality 4x3 Keypad Matrix lets you quickly add controls to your electronics projects. It offers 0-9 numerals, standard star(*) and hash(#) symbols.
Features:
First, ignore the sellers numbering. There's a mistake in it. Second, know that the first and last position on the keypad terminals are not being used so my keypad numbering goes like this:
X 1 2 3 4 5 6 7 X
Third, Arduino pin numbers 0 and 1 are generally not used for the keypad so start with 2 - 8. The corresponding pin numbers to wire to the keypad are as follows:
X 7 2 6 5 8 4 3 X
The correct row and col are as follows:
X C2 R1 C1 R4 C3 R3 R2 X
This means when you create your code (sketch), the lines of code that designate the Arduino pins being used for the key pad are as follows:
byte rowPins[ROWS] = {2, 3, 4, 5};
byte colPins[COLS] = {6, 7, 8};
First, ignore the sellers numbering. There's a mistake in it. Second, know that the first and last position on the keypad terminals are not being used so my keypad numbering goes like this:
X 1 2 3 4 5 6 7 X
Third, Arduino pin numbers 0 and 1 are generally not used for the keypad so start with 2 - 8. The corresponding pin numbers to wire to the keypad are as follows:
X 7 2 6 5 8 4 3 X
The correct row and col are as follows:
X C2 R1 C1 R4 C3 R3 R2 X
This means when you create your code (sketch), the lines of code that designate the Arduino pins being used for the key pad are as follows:
byte rowPins[ROWS] = {2, 3, 4, 5};
byte colPins[COLS] = {6, 7, 8};
Package Included:
5 X 4*3 Keyboard Module
