Author Topic: IBM golfball writer and model F capacitive keyboard  (Read 4392 times)

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Offline snhstq

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IBM golfball writer and model F capacitive keyboard
« on: Sun, 14 June 2015, 09:49:19 »
Hi all,

I recently discovered that the IBM Typewriters (like type 65) contains a model F capacitive keyboard.


This keyboard has a TTL parallel interface, needs only +5V and can easily be interfaced with an AVR chip.
After replacing the standard  keys with PS/2 keys you have a very nice little keyboard.
Just to let you all know....



(p.s. the missing caps are on order :-)





Offline fohat.digs

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Re: IBM golfball writer and model F capacitive keyboard
« Reply #1 on: Sun, 14 June 2015, 10:04:06 »
Looks more Model M-style to me.

Too bad it doesn't have the coveted "Code" key.
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Offline berserkfan

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Re: IBM golfball writer and model F capacitive keyboard
« Reply #2 on: Sun, 14 June 2015, 10:31:29 »
can't quite see any membrane that speaks of Model M. But it seems to be using barrel plate?
Most of the modding can be done on your own once you break through the psychological barriers.

Offline snhstq

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Re: IBM golfball writer and model F capacitive keyboard
« Reply #3 on: Sun, 14 June 2015, 11:10:59 »
Correction: not a model F, but it is a capacitive buckling spring (not membrame) keyboard.
I converted it to a small model M style.

 

Offline 0100010

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Re: IBM golfball writer and model F capacitive keyboard
« Reply #4 on: Tue, 16 June 2015, 18:35:41 »
Nice little board.  Looks like an xwhatsit with an adapter would work on it.
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Offline FrostyToast

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Re: IBM golfball writer and model F capacitive keyboard
« Reply #5 on: Tue, 16 June 2015, 18:40:41 »
Model m style is membrane.
It's buckling spring over a membrane.
Membrane =/= rubber dome.
Membrane just refers to the two sheets with circuitrycircuitry that get pressed together by pressure from keys to complete a circuit and register a stroke.
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Offline JP

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Re: IBM golfball writer and model F capacitive keyboard
« Reply #6 on: Tue, 05 September 2017, 09:28:55 »
I found a Model 85 typewriter which has a capacitive keyboard as well. The Model 65, 85, and 95 typewriters have these type of keyboards. They don't show up too often.

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« Last Edit: Tue, 05 September 2017, 09:39:32 by JP »
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Offline E TwentyNine

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Re: IBM golfball writer and model F capacitive keyboard
« Reply #7 on: Tue, 05 September 2017, 09:45:07 »
Necro, but a worthy one.  Yeah those are rare beasts, and I think they all have that unique stepped big-ass-enter key.
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Offline 0100010

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Re: IBM golfball writer and model F capacitive keyboard
« Reply #8 on: Tue, 05 September 2017, 15:14:23 »
JP - could you get a pic of just the PCB?
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Offline JP

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Re: IBM golfball writer and model F capacitive keyboard
« Reply #9 on: Fri, 08 September 2017, 20:43:55 »
Here ya go.

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Therapy is expensive so I buy keyboards and bike parts.