Interface 4×3 & 4×4 Membrane Keypad with Arduino

Matrix keypads are the kind of keypads you see on cell phones, calculators, microwaves ovens, door locks, etc. They’re practically everywhere.

However, in DIY electronics, they are a great way to let users interact with your project and are often needed to navigate menus, punch in passwords and control robots.

Membrane keypads are made of a thin, flexible membrane material. They do come in may sizes 4×3, 4×4, 4×1 etc. Regardless of their size, they all work in the same way.

One of the great thing about them is that they come with an adhesive backing so you can attach it to nearly anything. You just have to peel the paper backing off.

 

 

I found these tutorials very usefull. Go and have a look at them.

https://lastminuteengineers.com/arduino-keypad-tutorial/

https://www.electronicwings.com/arduino/4x4-keypad-interfacing-with-arduino-uno