#26 · 4x4 matrix keypad
Tutorial goals
- Controlling matrix keypad / membrane keyboard
Components needed
- 1× Arduino
- 8× Jumper wire (male-male)
- 1× Matrix keypad
Buy components
- $ 7.35 Arduino Uno (clone) with cable
- $ 12.77 Arduino Uno (clone)
- $ 25.97 Arduino Uno SMD (original)
- $ 27.31 Arduino Uno Chip (original)
- $ 0.52 Jumper wire assortment (MM/MF/FF)
- $ 0.52 Jumper wire male-male
- $ 3.27 Jumper wire male-male
- $ 0.74 4x4 matrix keypad
- $ 2.22 4x4 matrix keypad
- $ 0.65 4x4 buttons matrix
Bas on Tech earns a small fee for each sale made via these links.
All products shown are not being sold by Bas on Tech.
All products shown are not being sold by Bas on Tech.
There are many kinds of matrix keypads. A flat one, the so-called membrane keypad, but there keypads with tactile switches available as well. Even the size can vary per model. Below, in the component section, there are all kinds of keypads listed with the sizes 4x3, 4x4, 4x1, 5x1, 6x1 and 3x4. They all work the same way: for each row and column there is a pin.
When you press a key, a row and colomn is connected. This makes two pins on the Arduino HIGH. In this way we can determine which button has been pressed. In this video I explain how you can use a keypad library to make your life easier.
