Search found 166 matches

by OleVoip
28 Sep 2015, 19:08
Forum: Deskthority talk
Topic: Post your deskthority header images here
Replies: 2254
Views: 107303

+1, gorgeous!
by OleVoip
28 Sep 2015, 19:00
Forum: Off-topic
Topic: Ever wondered how we seem like to non keyboard enthusiasts?
Replies: 44
Views: 2247

I'm still wondering whether it's clever to channel your obsession into something rare and eccentric like those turqoise white-goods. On the one hand, your collection has a natural limit and will never grow real big; on the other hand, completion of your collection will always seem achievable to you,...
by OleVoip
28 Sep 2015, 17:13
Forum: Other external
Topic: Great/Interesting Finds
Replies: 22618
Views: 1224097

That's the keyboard of a deccafax viewdata terminal http://www.sciencemuseum.org.uk/HoMImages/Components/1392/139284_3.png Photo: Science Museum at Wroughton, license: CC-BY-NC-ND 2.0 Owing to the UB80 cherry part number, I'd expect vintage Cherry MX blacks. Viewdata or "prestel" was a British video...
by OleVoip
28 Sep 2015, 00:40
Forum: Workshop
Topic: Diagnosing a dead column
Replies: 9
Views: 501

Does your MM also measure frequency? Then you could watch the controller as it scans the matrix. You would expect a healthy controller to scan this column with the same frequency as the neightbouring columns.
by OleVoip
26 Sep 2015, 00:47
Forum: Workshop
Topic: Teensy wiring
Replies: 19
Views: 2847

Yes, sorry, I've been sloppy. You use the decoder to multiplex the input lines, but this doesn't make it a multiplexer.
by OleVoip
25 Sep 2015, 23:36
Forum: Keyboards
Topic: IDENTIFY THE KEYBOARD thread
Replies: 3707
Views: 189522

It's just that single key with ISO #47 (\) that they have placed with the keys #44 to 46 (^ and brackets) instead of putting it beside key #5 (Z), a feature ISO introduced in 1975, when the board was already made. Otherwise, this is perfectly ISO: all other 46 alphanumeric keys are in the right plac...
by OleVoip
24 Sep 2015, 17:08
Forum: Gallery
Topic: Post your keyboard/keycaps!
Replies: 2761
Views: 207933

Sorry, I meant to say that a " Siemens board with a proper Siemens '7'" has a switch underneath. The font was designed about 1930 under Siemens guidance, based on a Prussian precursor, and is known as DIN-1415 . It is often seen in Germany, where it is also used for public road signs (in its modern ...
by OleVoip
24 Sep 2015, 14:35
Forum: Gallery
Topic: Post your keyboard/keycaps!
Replies: 2761
Views: 207933

Mmm… that 7. Those Ümlauts! Got any pics of those boards? 1980s http://www.dosforum.de/viewtopic.php?f=29&t=8842 http://www.pixelbanane.de/yafu/607957948/Img_0893.jpg 1960s http://old.fernschreibamt-hausneindorf.de/html/t100s.html http://old.fernschreibamt-hausneindorf.de/assets/images/Siemens-T100...
by OleVoip
23 Sep 2015, 23:50
Forum: Gallery
Topic: Post your keyboard/keycaps!
Replies: 2761
Views: 207933

... Getting really old-school now! That reminds me of the keycap font SIemens used in the 1970s/80s, http://www.stvzo.de/html/stvzo/fzv/2.3.1.jpg edit: Sorry, I have to correct myself: For the umlauts , they did it differently such that the letters have their regular size and smaller dots are put o...
by OleVoip
21 Sep 2015, 19:38
Forum: Keyboards
Topic: The Oracle Answers
Replies: 1533
Views: 121915

Consensus in ergo land, for what it's worth, is definitely that lighter switches are better. This does not hold so generally. A light short-travel switch is ergonomically worse than a heavier long-travel switch, because bottoming out is a strain. Tactility provides important haptic feedback, so it ...
by OleVoip
19 Sep 2015, 01:44
Forum: Keyboards
Topic: IDENTIFY THE KEYBOARD thread
Replies: 3707
Views: 189522

Haven't seen exactly that one, yet, but it seems to be a variant of those key modules of Siemens-Nixdorf's that have an integrated rubber dome; similar to this precursor depicted in a longitudinal cut, http://worldwide.espacenet.com/espacenetImage.jpg?flavour=firstPageClipping&locale=en_EP&FT=D&date...
by OleVoip
18 Sep 2015, 14:34
Forum: Keyboards
Topic: The Oracle Answers
Replies: 1533
Views: 121915

Interestingly, there is even a 1992 patent on that kind of dampening, http://worldwide.espacenet.com/espacenetImage.jpg?flavour=firstPageClipping&locale=en_EP&FT=D&date=19920220&CC=DE&NR=3742711C2&KC=C2 where #22 is the silicone bead. However, I'd rather advise to use a tactile switch and have your ...
by OleVoip
16 Sep 2015, 09:23
Forum: Other external
Topic: Great/Interesting Finds
Replies: 22618
Views: 1224097

wat is dat (looks like Siemens) http://www.leboncoin.fr/sports_hobbies/855104461.htm?ca=12_s Siemens keycaps on switches, no RD, ISO-2530 bit-paired keyboard layout, typical for European non-office keyboards till the late 1980s. Otherwise, this doesn't look as if it once was a Siemens device. Among...
by OleVoip
15 Sep 2015, 18:34
Forum: Workshop
Topic: Teensy wiring
Replies: 19
Views: 2847

Sorry I don't do PCBs, just perfboard and wires. I'm using the 74HC154 (high-speed CMOS) multiplexer which can be run with a supply as low as 2 Volts and which is available from DIP24 down to TSSOP24 housings. It decodes 4 bits to 16 lines, the active line is low. (Hence, the sensing lines need to b...
by OleVoip
15 Sep 2015, 16:18
Forum: Workshop
Topic: Teensy wiring
Replies: 19
Views: 2847

I love them multiplexers. I find it so nice to address a column just by putting its number to a port that I even use it when I could do without it. (And maybe one day I'll have an idea what I could use the pins for that I've spared.) But my point was that you often can choose another matrix with the...
by OleVoip
15 Sep 2015, 15:43
Forum: Workshop
Topic: Teensy wiring
Replies: 19
Views: 2847

Well, in practice you start with a given switch count, not with a given pin count. The switch count seldom is a square number (49, 64, 81, 100, 121 or 144), so you often can choose between several matrix layouts which have the same pin count as the square matrix for your number of keys. The point I ...
by OleVoip
15 Sep 2015, 13:44
Forum: Gallery
Topic: PTT Telescript 32 keyboard
Replies: 9
Views: 791

The gotcha with German products is that Google Patents doesn't have most of the illustrations, so you'd have to trawl through all the descriptions trying to guess whether you think it's the same patent. I wouldn't be surprised if this was Siemens's own switch, as it's distinctly different from othe...
by OleVoip
15 Sep 2015, 13:23
Forum: Keyboards
Topic: Siemens Transdata Terminal keyboard & Siemens T1000 switch
Replies: 52
Views: 3310

And please take a look of this Transdata Model 305: http://myweb.tiscali.co.uk/mickfrench/transdat.htm That's not Siemens but Transdata, Ltd., Hampshire, a British company of the 1970s that made carry-along terminals with thermal printers instead of CRTs. I used the term "Transdata" rather sloppily...
by OleVoip
15 Sep 2015, 11:30
Forum: Workshop
Topic: Teensy wiring
Replies: 19
Views: 2847

A square matrix is the most efficient. This is rarely true. For 108 keys, the minimum number of port pins required for the matrix is 22. There is a choice of four matrices with 22 pins: 11x11, 12x10, 13x9 and 14x8. Wiringwise, the 12x10 matrix would be most efficient, since you could simply split t...
by OleVoip
15 Sep 2015, 09:38
Forum: Keyboards
Topic: Siemens Transdata Terminal keyboard & Siemens T1000 switch
Replies: 52
Views: 3310

Can I call it Siemens vintage switch? You can call it "vintage" since it's linked to the 1970s/80s and seems to have disappeared after 1990. The facts that we know by now strongly suggest it's a "Siemens switch", but we don't have full evidence, yet (which would be a catalogue entry for that switch...
by OleVoip
14 Sep 2015, 16:29
Forum: Keyboards
Topic: Siemens Transdata Terminal keyboard & Siemens T1000 switch
Replies: 52
Views: 3310

Looking at the picture I'm now sure that mine is also a Siemens teletypewriter varaint. The switches basically were the same in the teletypewriters and the Transdata terminals, but Seebart's keyboard is from a terminal, not a teletypewriter. The keyboard case has this funny shape with the bevel on ...
by OleVoip
14 Sep 2015, 16:18
Forum: Keyboards
Topic: IDENTIFY THE KEYBOARD thread
Replies: 3707
Views: 189522

Looking at the picture I'm now sure that mine is also a Siemens teletypewriter varaint. I think seebart's keyboard is the very first type with this switch, and mine have the PCB mount is the later type keyboard. Here they're already busy with sth different, so I'll comment on it in seebart's thread.
by OleVoip
12 Sep 2015, 14:58
Forum: Keyboards
Topic: Siemens Transdata Terminal keyboard & Siemens T1000 switch
Replies: 52
Views: 3310

Oh, cheers! :oops: :)
by OleVoip
12 Sep 2015, 14:34
Forum: Keyboards
Topic: Siemens Transdata Terminal keyboard & Siemens T1000 switch
Replies: 52
Views: 3310

I think, your switch is a variant of this one, except for the latching and the illumination: http://worldwide.espacenet.com/espacenetImage.jpg?flavour=firstPageClipping&locale=en_EP&FT=D&date=19821228&CC=US&NR=4365903A&KC=A This is from a Siemens patent, DE2933983 / US4365903, filed in August 1979. ...
by OleVoip
12 Sep 2015, 02:01
Forum: Keyboards
Topic: Siemens Transdata Terminal keyboard & Siemens T1000 switch
Replies: 52
Views: 3310

This keyboard originates from a Siemens Transdata terminal (late 1970s), but obviously some previous owner has tinkered with it. Possibly, the switches were made by Siemens EC division; maybe, Siemens sourced them from somewhere else. All I can say is, they were not in the catalogue of preferred par...
by OleVoip
12 Sep 2015, 01:37
Forum: Keyboards
Topic: IDENTIFY THE KEYBOARD thread
Replies: 3707
Views: 189522

@terrycherry: As the presence of the bell key (⍾) and the who-are-you key (✠) suggests, this must have been the keyboard of a teletypewriter. I'm certain, it's from a Siemens T1000, international or military variant, from the late 1970s or early 1980s. Compare with photos of the German variant . Sie...
by OleVoip
11 Sep 2015, 13:26
Forum: Diskussionen auf Deutsch
Topic: Was ist ein "maker"?
Replies: 16
Views: 1166

Die "Maker" sind auf geekhack der Typ Leute, die sich auch in Deutschland "Maker" nennen. Ähnlich denen, die man früher "Tüftler" nannte, aber keine Eigenbrötler, sondern eine vernetzte Szene (oder wie man heute sagt: Subkultur).
by OleVoip
30 Jul 2015, 20:41
Forum: Keyboards
Topic: Possible improvements over standard keyboards
Replies: 36
Views: 1378

in German, / is Shift-7, and ] is AltGr-0. That in turn is sent as Ctrl-Alt-0, which makes it impossible in German layouts to press Ctrl-]. I once had a program that had this shortcut for a quite important function. No way to do this with German layout, besides being an awkward combination at the G...
by OleVoip
21 Jul 2015, 12:48
Forum: Deskthority wiki talk
Topic: A new keyboard category?
Replies: 9
Views: 1061

To my mind, items are "vintage" if and only if you can ascribe a period to them that has gone by long ago (say, 15 years at least). If a keyboard model still is "in production", it can only be considered vintage if an uninformed person would think it was from that period. Regarding details like the ...
by OleVoip
15 Jul 2015, 11:20
Forum: Diskussionen auf Deutsch
Topic: Need some advice :)
Replies: 14
Views: 1217

I've never heard so. In my experience, the customs office wants you or a representative to show up in person. However, if the customs declaration provided by the sender makes sense to them and delivery is by DHL / Deutsche Post, they don't ask you to come and tax & customs can be paid to the postman...

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