Author Topic: IBM golfball writer and model F capacitive keyboard (Read 5002 times)

snhstq · « **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 :-)

fohat.digs · « **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.

berserkfan · « **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?

snhstq · « **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.

0100010 · « **Reply #4 on:** Tue, 16 June 2015, 18:35:41 »

Nice little board. Looks like an xwhatsit with an adapter would work on it.

FrostyToast · « **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.

JP · « **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.