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Atari CX85 Numpad (USB modified

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jalli:
Figured I'd post this hack.

Found an old Atari CX85 on Ebay for $18, splurged on a Teensy 2 and wired it all up.

Layout/Firmware can be found on https://github.com/jalli/tmk_keyboard/tree/master/keyboard/cx85

nubbinator:
What kind of switches does it have?  And how long did it take you to figure out all the code for it?

That's such a cool little project.  I actually really love the layout of that.  The 3x +/Enter is a little wonky and it's sad it's missing the other parts of a numpad, but that's a pretty awesome little retro box and a cool little project. 

kaltar:
Love it!!! So damn cool!!!

sth:

--- Quote from: nubbinator on Thu, 21 November 2013, 22:55:38 ---What kind of switches does it have?  And how long did it take you to figure out all the code for it?

That's such a cool little project.  I actually really love the layout of that.  The 3x +/Enter is a little wonky and it's sad it's missing the other parts of a numpad, but that's a pretty awesome little retro box and a cool little project. 

--- End quote ---


http://deskthority.net/wiki/Stackpole_switch_grid

jalli:

--- Quote from: nubbinator on Thu, 21 November 2013, 22:55:38 ---What kind of switches does it have?  And how long did it take you to figure out all the code for it?

That's such a cool little project.  I actually really love the layout of that.  The 3x +/Enter is a little wonky and it's sad it's missing the other parts of a numpad, but that's a pretty awesome little retro box and a cool little project.

--- End quote ---

There are some great shots of the PCB and switches in here:
http://atariage.com/forums/topic/155452-hacking-the-atari-800-keyboard-cx85-keypad-onto-a-usb-pc-keyboard-circuit/

The Caps have the same cross as the Cherry MX but the stems are a bit wider so they would not fit an MX switch without shaving the outside. On the plus side any Cherry MX Caps will fit the CX85.

It took about a day to figure out all the wiring and the grid, soldered the PCB end and then used a breadboard to test everything out before soldering permanently.

It's a nifty little box, I've been thinking about transplanting some caps from my Televideo set: http://geekhack.org/index.php?topic=49503.msg1071064#msg1071064 since they are compatible.

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