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geekhack Projects => Making Stuff Together! => Topic started by: pixel5 on Mon, 16 September 2013, 08:51:02

Title: How a Row-Column Matrix Works
Post by: pixel5 on Mon, 16 September 2013, 08:51:02

I can't embed it here because it's a flash object, but check out the animation on this page. It will help you understand how it works on a keyboard. http://www.howstuffworks.com/lcd4.htm

It's like Battleship. B5 = Row B Column 5.


Thought this might be useful for someone getting into keyboard making.

Title: Re: How a Row-Column Matrix Works
Post by: CPTBadAss on Mon, 16 September 2013, 09:18:37

In xwhatsit's beamspring usb thread, he does a good job of both showing his work and explaining what he did.  I think this and that thread would be excellent primers for creating a custom controller

Title: Re: How a Row-Column Matrix Works
Post by: whiskytango on Mon, 16 September 2013, 09:36:14

I thought this one was pretty helpful too

http://pcbheaven.com/wikipages/How_Key_Matrices_Works/ (http://pcbheaven.com/wikipages/How_Key_Matrices_Works/)

Title: Re: How a Row-Column Matrix Works
Post by: pixel5 on Mon, 16 September 2013, 10:06:12

Quote from: whiskytango on Mon, 16 September 2013, 09:36:14

I thought this one was pretty helpful too

http://pcbheaven.com/wikipages/How_Key_Matrices_Works/ (http://pcbheaven.com/wikipages/How_Key_Matrices_Works/)

Awesome guide.

Title: Re: How a Row-Column Matrix Works
Post by: StrikeEagleCC on Tue, 17 September 2013, 21:20:19

Quote from: whiskytango on Mon, 16 September 2013, 09:36:14

I thought this one was pretty helpful too

http://pcbheaven.com/wikipages/How_Key_Matrices_Works/ (http://pcbheaven.com/wikipages/How_Key_Matrices_Works/)

This one is my favorite.

I made a gif to show high-Z states and pull-up resistors in a matrix: see my sig. I'm open to input about how to improve it.

Title: Re: How a Row-Column Matrix Works
Post by: agodinhost on Tue, 17 September 2013, 21:36:22

Quote from: whiskytango on Mon, 16 September 2013, 09:36:14

I thought this one was pretty helpful too

http://pcbheaven.com/wikipages/How_Key_Matrices_Works/ (http://pcbheaven.com/wikipages/How_Key_Matrices_Works/)

This one is classic!
Well know in the internet ...

Title: Re: How a Row-Column Matrix Works
Post by: dorkvader on Thu, 19 September 2013, 22:47:50

That pcbheaven one is good, I haven't seed it before.
Here's the one I like te refer to:
http://www.dribin.org/dave/keyboard/one_html/