Basic Page to keyboardswitches and keyboard-topics

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speedyG's picture
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Joined: Nov 16 2011
Posts: 2413

Hello to all Af-members,

within the last months a lot of threads about keyboards and keyswitches.......

i decided to make a general page related to that topic and explain the functions and the different kinds of keyswitches used in various keyboards and basic knowledge how to fix problems and how to replace keyswitches if no repair is possible. The entire page is located at:

http://www.harrowalsh.de/Elektronik/APPLEBOX/appleboxkeypage.htm

i hope this limits the amount of new threads related to this topic and i will add in short future another page about the basics of the operation of the keyboard-encoders.

feedback to possible enhancements of the page are welcome....

sincerely
speedyG

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In early days I had a lot of money but no time - now I have no money but a lot of time....
the second part includes less friends but a lot more joy on life....

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Joined: Oct 9 2011
Posts: 1063
Re: Basic Page to keyboardswitches and keyboard-topics

Two words... Your amazing...

Too bad for the Datanetics switches you can't disassemble them like the IIe switches. Very interesting read and great pics....

Cheers,
Corey

speedyG's picture
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Joined: Nov 16 2011
Posts: 2413
Re: Basic Page to keyboardswitches and keyboard-topics

Corey986 wrote:

Two words... Your amazing...

Too bad for the Datanetics switches you can't disassemble them like the IIe switches. Very interesting read and great pics....

Cheers,
Corey

Hello Corey,
thats not completely true.... true is:
it´s a very bad challenge ! you must cut the case at the collar with very heated razorblade or very hot scalpel and after repair you have to first adjust and fix with very few superglue and afterwards melt / modell again with very hot scalpel.... then you can polish....
I´d do this only if a man threats me with a gun - and if no other solution is availiable....

Tip: very ancient old keyboards from IBM34-terminals and 370 Terminals and some very old telextype Terminals contain keyswitches very similar to those from datanetics....
sincerely
speedyG

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In early days I had a lot of money but no time - now I have no money but a lot of time....
the second part includes less friends but a lot more joy on life....

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Joined: Jun 5 2008
Posts: 382
Re: Basic Page to keyboardswitches and keyboard-topics

It's been a while since I met a Datanetics keyswitch that I could not resurrect through flooding with isopropyl alcohol and repeated exercise, though it may take several sessions.

I have a page on early Datanetics/Apple keyboards that may be of interest to readers of this thread.

http://www.willegal.net/appleii/early-a2-keyboards.htm

Regards,
Mike W.

speedyG's picture
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Joined: Nov 16 2011
Posts: 2413
Re: Basic Page to keyboardswitches and keyboard-topics

Hello to all AF members,

so now also the second part has been added that treats in detail the keyboardmatrix and the decoderchips including datasheets for download .....

http://www.harrowalsh.de/Elektronik/APPLEBOX/appleboxldecoderpage.htm

i hope this solves the last issues related to this topic and it remains as a kind of basic reference to everybody who is forced to get into the details or wants to learn about the basics of this topic.....

just by the way.... why not create a forum to collect such kind of basical pages as a kind of reference and collection of help-pages ? it probably might help to save space within the system of AF and avoid redundant threads.... just a idea....

sincerely speedyG

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In early days I had a lot of money but no time - now I have no money but a lot of time....
the second part includes less friends but a lot more joy on life....