NEW PRODUCTS – Matrix Keypads – 3×4 + 4×4

Punch in your secret key (or Jenny’s number) into these numeric matrix keypads. We got ‘em in two “flavors”!

First up, the 3×4!

This keypad has 12 buttons, arranged in a telephone-line 3×4 grid. The keys are connected into a matrix, so you only need 7 microcontroller pins (3-columns and 4-rows) to scan through the pad. Check the tutorials tab for links to an Arduino library and example code.

We include some header so you can plug this into a breadboard with ease, some light soldering is required to attach it. Or you can use plain wires if you like.

There’s a great Matrix Keypad Arduino library that should work great with this item with minor adjustments. It’s basically a sturdier version of our Membrane 3×4 Matrix Keypad. Note that the rows and columns are intermixed. The order from left to right is COL2, ROW1, COL1, ROW4, COL3, ROW2, ROW1

If you dig our demo, check out the Adafruit FeatherWing OLED – 128×32 OLED

We also have a 4×4 version of this matrix keypad and a version that has phone-styling with letters printed over the numbers

Next up, the 4×4!

This keypad has 16 buttons, arranged in a telephone-line 4×4 grid. The keys are connected into a matrix, so you only need 8 microcontroller pins (4-columns and 4-rows) to scan through the pad. Check the tutorials tab for links to an Arduino library and example code.

We include some header so you can plug this into a breadboard with ease, some light soldering is required to attach it. Or you can use plain wires if you like.

There’s a great Matrix Keypad Arduino library that should work great with this item with minor adjustments. It’s basically a sturdier version of our Membrane 3×4 Matrix Keypad. Starting from the left there are four row pins, and then to the right are the four column pins.

If you dig our demo, check out the Adafruit FeatherWing OLED – 128×32 OLED

In stock and shipping now! Matrix Keypads – 3×4 + 4×4