FIELD TEST
ADAFRUIT $6.50 adafruit.com
Easy to use
and reliable.
VERDICT
9 / 10
ot a project that requires a
stealthy code to be input? If so,
this is the keypad for you! The
Adafruit 3×4 Matrix Keypad has
twelve buttons, arranged in a
traditional telephone keypad grid.
They are wired in a matrix, which can easily be read
by a microcontroller using only seven pins. Adafruit
includes a library to get your Arduino project up and
running. A row of header pins is also included so
you can easily prototype with it on a breadboard.
G
3×4 Matrix Keypad
Adafruit includes a
library to get your Arduino
project up and running
”
”
Just like Adafruit’s membrane keypads, the mechanical matrix keypad
is available in multiple sizes. The larger 4×4 matrix is also arranged in a
telephone-style layout and will work just as easily as the smaller version
with your microcontroller. With this keypad, your code can include a few
alphanumeric inputs, making it extra secure.
4×4 MATRIX KEYPAD
ADAFRUIT $5.95 adafruit.com
Left
Need more
keys? Try the
larger 4×4
matrix keypad
Left
A great way to get
fast and reliable
keypad input