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  • 4x4 Universial 16 Key Switch Keypad Keyboard For Arduino
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4x4 Universial 16 Key Switch Keypad Keyboard For Arduino

by Kootek
| 4 answered questions

Price: $2.59 & FREE Shipping on orders over $35. Details
In Stock.
Sold by Kootek and Fulfilled by Amazon. Gift-wrap available.
  • 8P DuPont head, pitch 2.54mm, can be inserted in the Pin connection circuit; Peel off the white sticker on the back of the keyboard can be securely affixed to the surface of the chassis
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Frequently Bought Together

4x4 Universial 16 Key Switch Keypad Keyboard For Arduino + 2pcs nRF24L01+ 2.4GHz Wireless Transceiver Arduino Compatible + SainSmart HC-SR04 Ranging Detector Mod Distance Sensor (Blue)
Price for all three: $16.53

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Technical Details

  • Brand Name: Kootek
  • Model: 10

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Product Details

  • Shipping Weight: 0.5 ounces (View shipping rates and policies)
  • ASIN: B008A30NW4
  • Item model number: 10
  • Average Customer Review: 4.2 out of 5 stars  See all reviews (47 customer reviews)
  • Amazon Best Sellers Rank:
  • Date first available at Amazon.com: June 9, 2012

Product Description

8P DuPont head, pitch 2.54mm, can be inserted in the Pin connection circuit; Peel off the white sticker on the back of the keyboard can be securely affixed to the surface of the chassis

Customer Questions & Answers

Customer Reviews

If you're unsure, Google is your friend!
gregorthebigmac
I have not used this in a project yet, but I like the fact that it's so flat.
Imhotep
It's solidly built, reasonably flexible and an all round good product.
Gaurav Hirlekar

Most Helpful Customer Reviews

53 of 53 people found the following review helpful By J. Parsons on January 22, 2013
Verified Purchase
It does what is says it should do. That being said, I really don't like the idea that 8 of my 20 I/O ports are being used simply to run a keypad. I created a resistor array to pair up to the keypad and convert the key presses into a single channel varied resistance response. Now I can use the keypad using only 1 analog channel instead of 8 I/O. It took some time to figure out what resistor values would give me enough space between response values but in the end and about $0.50 worth of resistors I am much happier with this keypad.
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5 of 5 people found the following review helpful By Nicholas Black on April 11, 2013
Verified Purchase
This is a great little keypad for the money. Excellent for experimentation. Here is a link to a pin out drawing I did for this unit (since there isn't one referenced in the description). I hope that helps!

[...]
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6 of 7 people found the following review helpful By Steve G. on May 5, 2013
Verified Purchase
Works great with my arduino uno. The keypad.h library works great with it and there's a ton of sample code out there to get it working quick. Unfortunately it does take up 8 digital pins.
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3 of 3 people found the following review helpful By K. Wezwick on January 3, 2014
Verified Purchase
It's a 4x4 membrane keypad, and it does that well.

it doesn't come with any kind of pinout so it will require some googling and some multimeter testing to get the row and column pins identified.

Incidentally, the first four pins are the rows and the last for pins are the columns.

I wish it would have come with a female to male adapter so that I could plug it directly into a breadboard without a whole nest of jumper cables.

Also, keypads are more complicated than I realized so if I was an Arduino neophyte (I am), I'd buy some momentary switches instead.
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3 of 3 people found the following review helpful By Jake on April 22, 2014
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The pad is very thin, and comes with no pinout/documentation, although for less than $4 what can you ask for. Pressing a button activates two pins: the row and the column of the button pressed. After some experimentation I found that the pinout is (from left to right) R1 R2 R3 R4 C1 C2 C3 C4, where R and C are row and column, and 1,2,3,4 are top down for rows, and left to right for columns. All eight pins can be connected directly to digital (no 5V or GND needed), or if you really want to save space you can buy some 7400 series encoders to cut it down to 4 pins.
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6 of 8 people found the following review helpful By Gaurav Hirlekar on November 7, 2012
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It's solidly built, reasonably flexible and an all round good product.
It's also very well priced. I would especially recommend this for someone just getting into electronics and Arduino.
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1 of 1 people found the following review helpful By John S. Kjellman on June 13, 2014
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This keypad is supported by some of the standard Arduino libraries and works well. The only shortcoming is it is very thin and flexible. The back is covered in a double face tape material so I am assuming it is designed to be stuck to a rigid flat surface for proper operation.

It measures 2 1/4" wide by 3 1/16" tall and the 7/8" wide cable is attached to the back center bottom. If mounted to a rigid surface with a small slot cut in it the cable would not even be visible.
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1 of 1 people found the following review helpful By Elisabeth Nelson on September 4, 2013
Verified Purchase
There's not much to say about this. It's a little pricey for such a simple part but I needed a keypad and at the add-on price it cost about as much as shipping from anywhere else, so I went for it. It's a well-made little "squishy" keypad, very easy for someone with basic programming knowledge to quickly integrate into their project. There's no documentation included but you can see the traces through the back and it's pretty easy to figure out.
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