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Hacker.instanet.net • View topic - Keypads

Keypads

Anything Arduino

Keypads

Postby Tim Laren » Fri Dec 09, 2011 4:33 pm

We have in more of the original 16 key keypads.
16keypadS.jpg
16keypadS.jpg (14.56 KiB) Viewed 5511 times
They are a lot like an old telephone keypad but have the extra 4 keys (A-D) on the right. It has four mounting holes or just use a little hot glue and your all set.


We also have a new item.
16keypadmembrane.JPG
16keypadmembrane.JPG (16.11 KiB) Viewed 5511 times
It is also a 16 key keypad but this one is a little more waterproof because it's a plastic membrane keypad. Well you would have to mount it right to make the box waterproof and everything but it is nice for outside use. It comes with a sticky backing so you can attach it to your project in a second.


They are both very easy to connect up as they are just a matrix of 4 by 4. Setup 4 lines as output and 4 as input. You select one row at a time and read in all 4 inputs. If a key is pressed, calculate the button and that's it. You can dedicate 8 bits of I/O to the keypad id you like or share 4 bits with other stuff like an LCD Display.

I will work up a little code tonight and post it here later on.

Tim
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Re: Keypads

Postby Tim Laren » Fri Dec 09, 2011 6:08 pm

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Tim Laren
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Re: Keypads

Postby tmdrake » Sun Dec 11, 2011 1:47 am

lol, right up my ally. I need a keypad lib for my previous pic project...wanted to port it over to Arduino...
-Dennis (TM_Drake)
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