Search found 140 matches

by HuBandiT
16 Jun 2019, 13:18
Forum: Keyboards
Topic: Some of my best finds from Computer Reset
Replies: 63
Views: 5035

Re: Some of my best finds from Computer Reset

I like those narrow keys on the top, remind me of the first computer I used: https://www.hpmuseum.org/hp9830.htm

And the case is neat too.
by HuBandiT
05 Jun 2019, 15:12
Forum: Workshop
Topic: Alternative capsense patterns testing
Replies: 10
Views: 1059

Re: Alternative capsense patterns testing

numist wrote:
02 Jun 2019, 06:28
if memory serves the capacitance should drop with the square of the distance between the plates
not with the square of the distance, just inversely proportional to it
by HuBandiT
23 May 2019, 12:08
Forum: Want to buy
Topic: [WTB] capacitive board(s?) for prototyping
Replies: 2
Views: 277

Re: [WTB] capacitive board(s?) for prototyping

I would like to try another approach for the measurement (keypress detection), as well as the programmability.
by HuBandiT
23 May 2019, 02:51
Forum: Want to buy
Topic: [WTB] capacitive board(s?) for prototyping
Replies: 2
Views: 277

[WTB] capacitive board(s?) for prototyping

Looking for a relatively cheap(ish) board for prototyping a capacitive controller. Does not have to look nice at all, just have a reasonable number of keys (say >30%) in place so that I have something to test with. Keyboards where the capacitive matrix is separate from the controller electronics, so...
by HuBandiT
23 May 2019, 02:28
Forum: Want to buy
Topic: [WTB] 100% keyboard cases for prototyping
Replies: 0
Views: 243

[WTB] 100% keyboard cases for prototyping

I could use some cheap 100% keyboard cases for prototyping ISO (105 key) PCBs/controllers.

The larger (the more empty space around the keys for the controller) the better.

They do not have to look nice, as they will be hacked up anyway.
by HuBandiT
01 Sep 2018, 19:29
Forum: Workshop
Topic: CommonSense controller for digital piano project?
Replies: 48
Views: 2819

Fun with numbers: The sensor apparently used in the Lachnit has 0.8 mm between the two light beams (not much, right?). Modern microcontrollers routinely have a 200 MHz clock. Let's put these two into perspective. Let's conservatively assume that the metal hammer in the Lachnit keyboard does not fly...
by HuBandiT
01 Sep 2018, 16:44
Forum: Workshop
Topic: CommonSense controller for digital piano project?
Replies: 48
Views: 2819

since it's a dual optical sensor wouldn't be more like: r r XX__XX__XXXXXXXXXXXX____XX <-- r = reciever that with a timer could give you the time difference between 2 transitions and with that velocity of sorts ?? tran2 - tran1 / time = velocity ?? Oh yes, that is true. In essence you would double ...
by HuBandiT
01 Sep 2018, 13:38
Forum: Workshop
Topic: CommonSense controller for digital piano project?
Replies: 48
Views: 2819

then from there what I get is that the easier route is to send a very polite a loving email to pianoteq support asking if they have some documentation about what midi commands they accept and start designing from there, if we know what info to send its easier to see what sensors are more adequate, ...
by HuBandiT
01 Sep 2018, 12:51
Forum: Workshop
Topic: CommonSense controller for digital piano project?
Replies: 48
Views: 2819

Really good point Mu, midi is very constrained and at the end of the day you only send noteON(velocity) and that velocity only have 128 points of resolution if I remember correctly Don't limit our possibilities by this kind of thinking. These representational limits were true decades ago, but I hav...
by HuBandiT
01 Sep 2018, 12:21
Forum: Workshop
Topic: CommonSense controller for digital piano project?
Replies: 48
Views: 2819

Mu, what tricks are possible with 3 sensors that are not possible with 2? Whole new world to me, interesting what's there My theories: with 3 points, you can afford to make the release point (note off) to be at a different point of key travel, than where the (imagined) hammer starts to accelerate (...
by HuBandiT
01 Sep 2018, 11:49
Forum: Workshop
Topic: CommonSense controller for digital piano project?
Replies: 48
Views: 2819

Where capsense could really shine is in a mechanical, weighted piano with hammers (like my Roland or indeed a real piano) ... which is indeed the case above (real piano mechanism) ... and feeding its output to a software sound engine unlimited by midi’s 1980s constraints. ... which is where PianoTe...
by HuBandiT
01 Sep 2018, 09:49
Forum: Workshop
Topic: CommonSense controller for digital piano project?
Replies: 48
Views: 2819

Here however the concept is to sense the position of the hammers continuously. And that allows for some quite nice things (like negative latency). An extra idea would be to also sense the position of the dampers, as that would be another currently missing piece of information that is available on a ...
by HuBandiT
01 Aug 2018, 19:30
Forum: Workshop
Topic: Pictures of my PC cabinet 3d model based on IBM terminals.
Replies: 6
Views: 590

What will this do/how will this be used? SolidWorks can do curvature continuous fillets since 2015-2017ish - simply choose that option when creating the fillet. (I'll leave the flamewar on actual contributions of Apple on the topic of curvature continuous curves - let's just say the original motivat...
by HuBandiT
01 Aug 2018, 19:14
Forum: Workshop
Topic: Photogrammetry, 3D modeling, and design (building a custom case)
Replies: 5
Views: 622

show some photos so that we can have an idea what the thing looks like. if you just need some basic shapes and measurements, you are often better off with calipers, rulers and tape measures. to design a case takes some kind of engineering sense and planning and precision anyway, and studying the exi...
by HuBandiT
04 Jul 2018, 07:41
Forum: Workshop
Topic: CommonSense controller for digital piano project?
Replies: 48
Views: 2819

I just saw there are videos. My further recommendations: - measure velocity at the original position: the hammer - ditch the rail (unless it is part of the original mechanism) - mount a strip of (IR) transparent plastic or glass above the hammers where the strings would be hit; thick enough to get i...
by HuBandiT
04 Jul 2018, 06:51
Forum: Workshop
Topic: CommonSense controller for digital piano project?
Replies: 48
Views: 2819

just a few brief ideas: - you could go acoustic and put a tiny microphone capsule to be hit by the hammer; potentially behind some individual damping or blocking to prevent capsule damage; and measure hammer speed indirectly from the loudness of the sound/vibration it generates - just like it happen...
by HuBandiT
14 Dec 2017, 18:31
Forum: Workshop
Topic: Model M NKRO via a Capacitive Conversion?
Replies: 4
Views: 478

I was thinking about the easiest ways of converting the model m to operate with NKRO. It seems there are three general possibilities: Two more options: have a replacement 1×N "matrix" custom membrane designed and printed or you could try using the resistance inherent in the conductive film used in ...
by HuBandiT
13 Dec 2017, 17:40
Forum: Workshop
Topic: [Done] CommonSense: matrix LCR meter with a HID interface
Replies: 545
Views: 54646

DMA wrote: I fought damn EMI like 2 days ago, I know what I'm talking about.
Don't despair, Soarer's efforts were directed towards the much less noise-prone resistive keys, not capacitive like you do. Or am I mistaken?

Are you also experiencing EMI while not scanning?
by HuBandiT
03 Nov 2017, 16:45
Forum: Deskthority wiki talk
Topic: Wiki Q and A
Replies: 156
Views: 26875

Any ideas how to fix this? Most files from digital cameras have a flag in them telling which main (90 degree) orientation the camera was in when the photo was taken. The photo is still stored in the file in the original orientation the sensor saw it. Smart image viewers take the orientation flag in...
by HuBandiT
24 Oct 2017, 17:25
Forum: Workshop
Topic: Soviet "Gerkonic" (Zbrojovka Brno/Consul/Tesla) adapter resources
Replies: 13
Views: 2143

<off>
If it really is 1KRO, how do you type e.g. the symbol # on it? Press Shift, release Shift, press 3/#, release 3/#?
</off>
by HuBandiT
28 Sep 2017, 20:21
Forum: Keyboards
Topic: Inverted Soarer's converter
Replies: 7
Views: 724

Pick up a Win98 era ThinkPad with USB but without WiFi for about €30?
by HuBandiT
27 Sep 2017, 23:30
Forum: Keyboards
Topic: Converting an Old Typewriter Into a Mechanical Keyboard (In process)
Replies: 27
Views: 2663

SpacemanToby wrote: I'll have to bring my work laptop home for testing.
Maybe it is some kind of electromagnetic interference where your work laptop is. Maybe take it outside, away from such possible sources.
by HuBandiT
27 Sep 2017, 22:54
Forum: Workshop
Topic: Help with custom keyboard: Voltage issue
Replies: 10
Views: 775

if you probed any VCC pin you only get 0.6v instead of 5v. If you leave it connected to power, the chip also starts to get hot. (Also if you take the chip off the board and apply power, the proper 5v can be measured to all VCC pins.) seems like you need to... REVERSE THE POLARITY! seriously. your p...
by HuBandiT
16 Sep 2017, 23:12
Forum: Diskussionen auf Deutsch
Topic: BINARIUM Museum für persönliche Computer und Spielkonsolen in Dortmund
Replies: 2
Views: 2981

Im Universitätsstadt Szeged im Ungarn gibt's so was auch:

http://www2.u-szeged.hu/infmuz/, prospektus auf drei Sprachen: http://www.infmuz.hu/prospectus%20(HU,DE,EN).pdf

unter andere auch ein IBM 3278 mit beamspring und relais, gesamtgewicht 42,5 kg, tastatur allein 5 kg :)
by HuBandiT
16 Sep 2017, 15:56
Forum: Keyboards
Topic: Converting an Old Typewriter Into a Mechanical Keyboard (In process)
Replies: 27
Views: 2663

"old" is such a relative term; and apparently so is "mechanical"... https://www.usbtypewriter.com/ solder has surface tension (think water and hair), so it prefers to run to places where things run together (think a shallow Y shape), while likes acute angles less. so you might get better results by ...
by HuBandiT
09 Sep 2017, 21:57
Forum: Workshop
Topic: Restoring a Viatron System 21 keyboard
Replies: 36
Views: 2767

I wasn't aware that salt typically evaporated — can you really have salty air? If you can smell it in the air - and in my experience you can, near oceans -, I would say it is in the air. My guess is in this case it doesn't get there through actual evaporation (phase change in the physical sense), b...
by HuBandiT
09 Sep 2017, 21:23
Forum: Workshop
Topic: Fujitsu keyb cable connector pinout required
Replies: 11
Views: 741

First thread in Workshop.
by HuBandiT
09 Sep 2017, 17:53
Forum: Workshop
Topic: Fujitsu keyb cable connector pinout required
Replies: 11
Views: 741

Aristarco wrote: Oh, too bad it's an XT but still, if I can't make it work that way, I think I could use the key matrix and repurpose it with an Arduino or one of those Teensy boards I've read about in this forums.
Why not protocol-convert it with Soarer's or a similar solution?
by HuBandiT
09 Sep 2017, 17:45
Forum: Workshop
Topic: Restoring a Viatron System 21 keyboard
Replies: 36
Views: 2767

Yeah, that graphic is cringeworthy. Oh, c'mon guys... look how that keycap side contour accommodates and smoothes into the jaws of those pliers... why else do you think keycap sides were contoured like this? those keycaps were made for this... this is how they want to be handled... finally an excit...

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