Membrane Keypad 4X4 Matrix keyboard

Membrane Keypad 4×4 Matrix

This is a good quality Membrane Keypad 4×4 Matrix that can be used with your favorite Arduino projects. They are an excellent approach to enable user interaction with your project and are frequently required to access menus, enter passwords, and operate robots.

• 5 pins 2.54mm pitch connector, 16 keys (4 x 4 matrix)
• Easy communication with any microcontroller
• Ultra-thin design & adhesive backing provides easy integration to any project
• Excellent price-performance ratio
• Sticker can peel off for adhesive mounting
• Used widely in industrial and home electronic equipment, instrument, etc.

Related Video : 4×4 matrix keypad / keyboard,  Using Keypads with Arduino – Build an Electronic Lock

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Membrane keyboards work by electrical contact between the keyboard surface and the underlying circuits when keytop areas are pressed. This 4×4 matrix keypad has 16 built-in pushbutton contacts connected to row and column lines. A microcontroller can scan these lines for a button-pressed state.

What is the order of pins in Membrane Keypad 4×4 Matrix?

The Membrane Keypad 4×4 Matrix reads the pin in reverse order. So numbering will start from Pin 8. The pin sequence will be 87654321. In which the first four pins are Row Pins – 8765 and remaining pins are column pins – 4321.

How do I connect my 4X4 keypad to my Arduino?

Using the diagram above as a reference the leftmost pin is pin 8 on the keypad and the rightmost is pin 1. Pins 8, 7, 6, 5 on the keypad should be connected to digital pins 5, 4, 3, 2 on the Arduino respectively. Pins 4, 3, 2, 1 on the keypad should be connected to digital pins 9, 8, 7, 6 on the Arduino respectively.

What is keypad Arduino?

Keypad is a library for using matrix style keypads with the Arduino. As of version 3.0 it now supports mulitple keypresses. This library is based upon the Keypad Tutorial. It was created to promote Hardware Abstraction. It improves readability of the code by hiding the pinMode and digitalRead calls for the user.

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