Membrane 3x4 Matrix Keypad + extras - 3x4
Qty | Discount |
---|---|
1-9 | $3.95 |
10-99 | $3.56 |
100+ | $3.16 |
Description
Punch in your secret key into this numeric matrix keypad. This keypad has 12 buttons, arranged in a telephone-line 3x4 grid. It's made of a thin, flexible membrane material with an adhesive backing (just remove the paper) so you can attach it to nearly anything. 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 a 7-pin extra-long header strip so you can plug this into a breadboard with ease.
Technical Details
- Weight: 7.5 grams
- Keypad dimensions: 70mm x 77mm x 1mm (2.75" x 3" x 0.035")
- Length of cable + connector: 85mm
- 7-pin 0.1" pitch connector
Learn
![](http://cdn-learn.adafruit.com/guides/images/000/000/090/medium640/2012_12_28_IMG_1111-1024.jpg)
![](http://cdn-learn.adafruit.com/guides/images/000/000/696/medium640/Collins_Lab-Binary_and_Hex-YouTube-poster2.jpg)
![](http://cdn-learn.adafruit.com/guides/images/000/000/745/medium640/Screen_Shot_2014-09-23_at_10.17.35_PM.png)
![](http://cdn-learn.adafruit.com/guides/images/000/002/136/medium640/matrix_keypad_product.jpg)
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Core Electronics
Australia -
Digi-Key Electronics
United States -
Mouser Electronics
United States -
Letmeknow
France -
3DMakerWorld, Inc.
United States
See our Distributors page for a complete list of distributors.