Happy Buckling Keyboard

[hasu]

This is an IBM Model M keyboard mod as you can see.

Other Photos: http://imgur.com/a/JG0DU

[H=3]Membrane switch patching[/H]
Traces patched with copper tape and drew out via lead wires.




copper tape.



[H=3]Nut Bolt Mod[/H]
Of course this mod was needed to access its membrane sheet.
Just used M2 tapping screws and washers without nuts due to my laziness.





[H=3]Case Mod[/H]
Model M covers are probably PBT not ABS. I used CEMEDINE EP001 elastic adhesive to glue together PBT parts. The adhesive becomes very soft bead like rubber after cure time, so not suit for putty and carving.
Looks like more general Cyanoacrylate adhesive also works well with PBT case and you can use baking soda with this glue to putty and fill gap. http://en.wikipedia.org/wiki/Cyanoacrylate#Uses

Top and bottom cover.




USB receptacle and program switch.


Adhesive bead after cure.


Wrong cut made more seams :(




Not finished completely yet... But I don't care about keyboard cosmetic so much.


[H=3]Controller[/H]
Controller board consists of ATmega32U4 and only some other a few components. Its firmware shares most part of codes with my other keyboard converter or mod so it has features like multi-layer keymapping, media/system control key and mousekey.


Using this wiring method 0.8mm pitch TQFP44 package was wired with 0.3mm UEW on strip board. This was my first try and took very long time and resulted in ugly soldering.




Filed package mold a little because a pin was broken away.




[H=3]Other People's mod[/H]
[H=4]talis's:[/H]
http://geekhack.org/showthread.php?6635-how-to-lighten-BS-springs&p=106737&viewfull=1#post106737
[ Attachment Invalid Or Does Not Exist ] 47064[/ATTACH]

[H=4]o2dazone's:[/H]
http://geekhack.org/showthread.php?27121-They-call-me-the-chopper&highlight=chopper
[ Attachment Invalid Or Does Not Exist ] 47061[/ATTACH]

[H=4]mcpherrinm's:[/H]
http://geekhack.org/showthread.php?28872-Model-Happy-M-Hacking
[ Attachment Invalid Or Does Not Exist ] 47062[/ATTACH]


[H=3]Ideal Buckling Spring keyboard[/H]
This unknown buckling spring keyboard looks ideal to me.
http://geekhack.org/showthread.php?10347-Model-M-mini-micro-Whuuuuaaah&p=195628&viewfull=1#post195628
[ Attachment Invalid Or Does Not Exist ] 47063[/ATTACH]

[JesuswasaZombie]

Very nice, I definitely did a double take. Are you going to paint the case?

[mkawa]

NOICE!!

is that a custom membrane?

NEEDS MOAR TEXT

[hasu]

Thanks.
Added pics and some text in article page.

Painting will be needed to remove seams nicely but I don't care them so much and like original color. So I'm not sure I want to paint.

I cut and pasted membrane sheets and patched some trace lines with copper tape.

[JesuswasaZombie]

Well if you do take the paint route, that Industrial gray would be sweet.

[mkawa]

personally, i'd get it stripped and painted matte black.

[mkawa]

AHA! I'VE FOUND YOU AGAIN! ... and roll of 3m 18111 1/2" ordered off ebay

[mashby]

Amazing.

[sleepy916]

Wow, looks great!