empowering creative people

3x4 Phone-style Matrix Keypad

SKU: ADA1824

$10.96 AUD, inc GST
$9.96 AUD, exc GST

More Views

3x4 Phone-style Matrix Keypad
10.96 AUD

SKU: ADA1824

$10.96 AUD, inc GST
$9.96 AUD, exc GST
In stock, with a short lead time. 147 units dispatch in 4 to 7 days (in addition to the shipping method you choose). Our timing and stock is accurate. Delivery to you by Wed, 25th of Oct with Express Post within Australia.

Hey, Jenny, I've got your number! And I'm going to dial 867-5309 into this very nice phone-style matrix keypad. This keypad has 12 buttons, arranged in a telephone-line 3x4 grid. It's made of plastic with sturdy plastic buttons. The keys are connected to a matrix so you only need 7 microcontroller pins (3-columns and 4-rows) to scan through the pad.

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 Adafruit's Membrane 3x4 Matrix Keypad and comes with 7 or 8 header pins pre-soldered on for easy plugging. Starting from the left there are three column pins, and then to the right are the four row pins. If yours has an 8th pin, its not used and you can just leave it disconnected

Technical Details

  • Force: 160-180g
  • Contact Resistance: <100Ω
  • Weight: 23g

There is a very nice Matrix Keypad Arduino library that works great with this item. The only thing we suggest is to change the initialization code in the examples to this:

#include "Arduino.h" #include "Keypad.h" const byte ROWS = 4; //four rows const byte COLS = 3; //three columns char keys[ROWS][COLS] = { {'1','2','3'}, {'4','5','6'}, {'7','8','9'}, {'*','0','#'} }; byte rowPins[ROWS] = {5, 6, 7, 8}; //connect to the row pinouts of the keypad byte colPins[COLS] = {2, 3, 4}; //connect to the column pinouts of the keypad Keypad keypad = Keypad( makeKeymap(keys), rowPins, colPins, ROWS, COLS ); void setup(){ Serial.begin(9600); } void loop(){ char key = keypad.getKey(); if (key != NO_KEY){ Serial.println(key); } } 

This will swap the * and # keys and also let you connect to the Arduino with all the pins in order/in a row starting from digital 2 thru digital 9

This product is listed in:

Documentation and Resources:
  • The Maker Revolution
  • The Maker Revolution celebrates the creation of new devices and the modification of existing ones - the transition from a consumer buying goods to eventually having a major part in their creation. The Maker Revolution places strong emphasis on free (...
  • All About Electrical Switches
  • On and Off. It’s the basis for all electronics, from the most sophisticated computer network to a simple circuit. Electronics is all about using one thing, to control another, input and output, on and off. Even the transistors inside modern com...
  • Switches, Debouncing and the Arduino
  • When we boil it down, everyday interactions with electronics are usually limited to controlling stuff with switches. Whether it be turning on the lights, switching on your laptop or turning on the kettle, all examples of how a physical switch works...
  • Sound Effects Button
  • The idea for this project came when a friend of mine flew over from Western Australia to visit, and during his stopover in Adelaide, he did what any adult would do; visit the airport novelty store and buy some random stuff. It was pretty much all junk, except for this big green dome button which played a different, comic voice saying ‘YES’ every time you pressed it. Simple, but, it entertained us on the drive from Syd...

Product Comments

We deliver Australia-wide with these options:

  • $3 for Small Items (4-6 days, not tracked, only available on selected small items)
  • $6.95 for Standard Post (2-4 days, tracked)
  • $8.32 for Express Post (1-2 days, tracked)
  • Pickup - Free! Only available to customers who live in the Newcastle region

International Orders - the following rates are for New Zealand and will vary for other countries:

  • $11.49 for Pack and Track (3+ days, tracked)
  • $16.50 for Express International (2-5 days, tracked)

If you order lots of gear, the postage amount might increment based on the weight of your order.

Our physical address:

Unit 18, 132 Garden Grove Parade
Adamstown
NSW, 2289
Australia

Please checkout our customer service page if you have other frequently asked questions such as "do we do purchase orders" (yes!) or "are prices GST inclusive" (yes they are!). We're here to help - get in touch with us to talk shop.