Search found 508 matches

by wcass
05 May 2021, 01:43
Forum: Workshop
Topic: Extreme Model M Modding (m122 chop and 1u layout mod)
Replies: 23
Views: 1360

Re: Extreme Model M Modding (m122 chop and 1u layout mod)

i posted how i did the lighting for this back in 2011 on GeekHack. For anyone interested, ... https://geekhack.org/index.php?topic=21436.msg406236
by wcass
17 Apr 2021, 05:14
Forum: Workshop
Topic: Extreme Model M Modding (m122 chop and 1u layout mod)
Replies: 23
Views: 1360

Re: Extreme Model M Modding (m122 chop and 1u layout mod)

I made this in 2011 and has been my daily driver since. Typing on it right now.
It doesn't show well in the picture, but the Caps Lock key has blue LED indicator under it.
hack14.JPG
hack14.JPG (68.51 KiB) Viewed 828 times
by wcass
26 Feb 2021, 01:31
Forum: News
Topic: Unicomp retired black 104/105 Classic models + latest on the Mini M SSK
Replies: 18
Views: 1398

Re: Unicomp retired black 104/105 Classic models + latest on the Mini M SSK

i just ordered a mini. i expect that i will try it out for a few days before i crack it open and start on the F conversion. Ellipse has new F type flippers already; renrakS (and a few others, i think) are working on F type flippers too. when i get it done, i would like to send it back to Unicomp to ...
by wcass
30 Oct 2020, 00:56
Forum: Keyboards
Topic: Replacement Foam Mat for IBM Model F Keyboards?
Replies: 156
Views: 28165

Re: Replacement Foam Mat for IBM Model F Keyboards?

I am pretty sure the documents are in "units". You should be able to select your unit value when you open the file. Also, any CAD software should be able to scale a drawing. If you are on Windows or Mac, DeltaCAD is "beginner friendly" and the free trial version is fully functional. After 45 days, y...
by wcass
30 Oct 2020, 00:44
Forum: Keyboards
Topic: Replacement Foam Mat for IBM Model F Keyboards?
Replies: 156
Views: 28165

Re: Replacement Foam Mat for IBM Model F Keyboards?

You can go onto Etsy and search for "EVA costume". Most of what you get will be for laser patterns - but you can PM them and ask who they recommend for materials and service.
by wcass
20 Sep 2020, 23:05
Forum: Workshop
Topic: Bringing the IBM PC XT into the 21st Century
Replies: 331
Views: 55354

Re: Bringing the IBM PC XT into the 21st Century

I draw them out as 2D DXF file and import them into DipTrace. Wait, whole sense card? Does it count as one pin, or it's just "some copper fill" for diptrace? It is multiple "imported object". The entire import does not add to pin count. This is all presuming that you are using a 0.8 mm thick 2 laye...
by wcass
07 Sep 2020, 06:27
Forum: Workshop
Topic: Bringing the IBM PC XT into the 21st Century
Replies: 331
Views: 55354

Re: Bringing the IBM PC XT into the 21st Century

If you used KiCad for the footprints I'd appreciate them :) I am a DipTrace man myself. I don't actually use footprints for the switches. I draw them out as 2D DXF file and import them into DipTrace. This way they don't count against the 300 pin max for the free version. You should be able to creat...
by wcass
06 Sep 2020, 16:01
Forum: Workshop
Topic: Bringing the IBM PC XT into the 21st Century
Replies: 331
Views: 55354

Re: Bringing the IBM PC XT into the 21st Century

What makes me sad is that these projects arrive very close to the end, bright minds work and find solutions, and then suddenly... I am "OK" at "PCB design", and "not good" at "project management" or "promotion". I never planned to "sell" these myself, but did promise to share everything needed with...
by wcass
21 Aug 2020, 22:24
Forum: Keyboards
Topic: Replacement Foam Mat for IBM Model F Keyboards?
Replies: 156
Views: 28165

Re: Replacement Foam Mat for IBM Model F Keyboards?

Most "art foam" is in fact EVA. It is used a lot in cosplay circles because it is (often) colorful and easy to work with. It is sometimes a bit stiff for model F foam, but it worked for me.
by wcass
17 Aug 2020, 03:31
Forum: Keyboards
Topic: Replacement Foam Mat for IBM Model F Keyboards?
Replies: 156
Views: 28165

Re: Replacement Foam Mat for IBM Model F Keyboards?

If you use them, please review them so that i can correct any errors.
by wcass
16 Aug 2020, 05:38
Forum: Keyboards
Topic: Replacement Foam Mat for IBM Model F Keyboards?
Replies: 156
Views: 28165

Re: Replacement Foam Mat for IBM Model F Keyboards?

As laser cutters and services become more ubiquitous, i really should publish the DXF files for these. I had some cut a while back by laser and was very pleased with the quality and price. I will put this on my "to do" list if you guys ask for it.
by wcass
05 Aug 2020, 03:47
Forum: Workshop
Topic: (Model MF) Remodeling the Model M (aka.. the Mara)
Replies: 2153
Views: 235022

Re: (Model MF) Remodeling the Model M (aka.. the Mara)

A basic principal of capacitive and contact keyboard matrix design; rows and columns should intersect exactly once. If they intersect more than once, you will have two switches that produce the same result (at best) or two that do nothing (at worst). Your 121 key matrix will likely be 6 by 21 or 22....
by wcass
02 Aug 2020, 15:45
Forum: Workshop
Topic: (Model MF) Remodeling the Model M (aka.. the Mara)
Replies: 2153
Views: 235022

Re: (Model MF) Remodeling the Model M (aka.. the Mara)

Very little sound is generated by the flipper. Most comes from the spring smacking the inside of the barrel when it buckles - with secondary coming from vibration of the spring itself. Changing the spring will have the biggest impact on sound. I think Ellipse reported this too.
by wcass
30 Jul 2020, 04:45
Forum: Workshop
Topic: (Model MF) Remodeling the Model M (aka.. the Mara)
Replies: 2153
Views: 235022

Re: (Model MF) Remodeling the Model M (aka.. the Mara)

Unfortunately, that is not going to work. There are actually too many things wrong for me to go into it. I'll try to explain how to do it right in a future post. The idea behind this thread is to take an off-the-shelf M and make it an F by swapping out just membrane, flippers, and controller. Changi...
by wcass
16 Jul 2020, 05:11
Forum: Workshop
Topic: (Model MF) Remodeling the Model M (aka.. the Mara)
Replies: 2153
Views: 235022

Re: (Model MF) Remodeling the Model M (aka.. the Mara)

I think "carbon black" is preferred over graphite. It is commonly used as a plastic additive for color and anti-static, but also for capacitive pens at higher concentrations. I did some research a while back, but the manufacturer should know how high they can go given a flipper size and thickness. I...
by wcass
14 Jul 2020, 01:15
Forum: Workshop
Topic: (Model MF) Remodeling the Model M (aka.. the Mara)
Replies: 2153
Views: 235022

Re: (Model MF) Remodeling the Model M (aka.. the Mara)

Injection molding is the way to go. The flipper plastic needs an additive (carbon) to make it capacitive. I'm just going to order a complete keyboard and then disassemble. I will offer the designs up to Unicomp if they want them - if not, i will publish them as open. It would be best if folks could ...
by wcass
14 Jul 2020, 00:34
Forum: Workshop
Topic: (Model MF) Remodeling the Model M (aka.. the Mara)
Replies: 2153
Views: 235022

Re: (Model MF) Remodeling the Model M (aka.. the Mara)

With Unicomp's SSKs shipping any day, if you ask me it's just the flippers that is stopping this project. One can use all of Unicomp's components to build an MF board. PCBs are very cheap, the plastic barrel plate from Unicomp is good enough. The springs on the model M are F are interchangeable (th...
by wcass
16 Jun 2020, 03:18
Forum: Group buys
Topic: interest check Model M to capacitive PCB
Replies: 14
Views: 5722

Re: interest check Model M to capacitive PCB

ACK!
i didn't see that Unicomp announcement til just now.
i have been super busy this year so have had little time for my hobby.
definitely something i would design for, but will need an example to disassemble.
It would be great if we could get Unicomp to offer "capacitive" as an upgrade option.
by wcass
04 Mar 2020, 21:38
Forum: Workshop
Topic: A Smaller Xwhatsit
Replies: 105
Views: 15971

Re: A Smaller Xwhatsit

If [Del] is defined as [Fn+`] then [`] (without Fn) should unequivocally be [`] On the HHKB, if you do [Shift+`] and hold the [`] but let go of the [Shift] what do you get? Which of the below seems more correct? ~~~~~~~~~~~~~~~~~``````````````````````` or ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Have you been...
by wcass
18 Feb 2020, 20:57
Forum: Group buys
Topic: F62+F77 orders now open! New Kishsaver+Industrial Model F Keyboards
Replies: 6333
Views: 939315

Re: F62+F77 orders now open! New Kishsaver+Industrial Model F Keyboards

daijoubu wrote:
18 Feb 2020, 02:57
wcass, it would make sense if the old is 5.5u, so that the other key would be a 1.5u instead of a 1.25u.

At what point did you measure the spacebar? At the bottom length?
Yes, flat across the base of the cap.
by wcass
18 Feb 2020, 01:26
Forum: Group buys
Topic: F62+F77 orders now open! New Kishsaver+Industrial Model F Keyboards
Replies: 6333
Views: 939315

Re: F62+F77 orders now open! New Kishsaver+Industrial Model F Keyboards

So, "old" is slightly smaller than "new". Do you have a caliper?
Perhaps "old" is 5.5u (104.5 mm nominal) and "new" is 5.75u (109.25 mm)?
I am not sure which one i have, but it measures 104.8
by wcass
31 Jan 2020, 06:45
Forum: Workshop
Topic: A Smaller Xwhatsit
Replies: 105
Views: 15971

Re: A Smaller Xwhatsit

The files for USB-C.
As stated, the connector is larger so some things needed to move around. I had to move the Reset switch to the back.
xwhatsit USB-C.png
xwhatsit USB-C.png (54.89 KiB) Viewed 2484 times
by wcass
30 Jan 2020, 02:23
Forum: Workshop
Topic: A Smaller Xwhatsit
Replies: 105
Views: 15971

Re: A Smaller Xwhatsit

i just realized that the width changed. i am sure there was some reason for it, but ... i have no idea why that happened.
by wcass
30 Jan 2020, 02:02
Forum: Workshop
Topic: A Smaller Xwhatsit
Replies: 105
Views: 15971

Re: A Smaller Xwhatsit

I actually did design a version with USB-C connector and one with USB breakout pads. The USB-C connector is larger (in one demension) than micro USB and requires an additional resistor, so i had to move some stuff around and i think that C6 was eliminated because of that. I think i determined that i...
by wcass
29 Jan 2020, 04:08
Forum: Workshop
Topic: A Smaller Xwhatsit
Replies: 105
Views: 15971

Re: A Smaller Xwhatsit

I thought i posted these somewhere, but maybe not. I'm not sure i found the right BOM (it has been 3.5 years). I think this is it, but not sure. Location Type Form Factor C1;C2; 30pF; 0805; C3; 4.7uF; 0805; C4;C7;C8;C9;C10;C11;C12; 0.1uF; 0805; C5; 1uF; 0805; R1;R2; 22; 0805; R3;R6; 20K; 0805; R4;R7...
by wcass
28 Jan 2020, 02:48
Forum: Workshop
Topic: (Model MF) Remodeling the Model M (aka.. the Mara)
Replies: 2153
Views: 235022

Re: (Model MF) Remodeling the Model M (aka.. the Mara)

The dfx file is good to send for plasma/water jet cut from metal. Then put the metal through a slip roll to put the curve in.
Slip rollers are common in HVAC shops.
by wcass
17 Oct 2019, 05:32
Forum: Workshop
Topic: 65% Model F – Open Group Build
Replies: 55
Views: 14669

Re: 65% Model F – Open Group Build

I finally found my cheat sheet with post position measurements on it. There is about 1 mm between caps, so the actual caps are about 1 mm smaller than this. It is marked to .001 precision, but don't believe that. If you are off by 0.1, everything will work fine and no one will notice. I would not be...
by wcass
15 Oct 2019, 19:55
Forum: Workshop
Topic: 65% Model F – Open Group Build
Replies: 55
Views: 14669

Re: 65% Model F – Open Group Build

i think it is worth trying - make the bottom row pads slightly wide to accommodate as many different layouts as we can. We would need one more pin for a new column, though. Any suggestions as to what pin to use? And what pins to use for the TP option - with consideration for routing? Though i sugges...
by wcass
10 Oct 2019, 20:01
Forum: Workshop
Topic: 65% Model F – Open Group Build
Replies: 55
Views: 14669

Re: 65% Model F – Open Group Build

We could make a 3u space bar with posts equivalent to 1.5+1.5 and adjust some things a bit.
Then all of these become available ...
bottom row.png
bottom row.png (6.54 KiB) Viewed 7135 times
by wcass
09 Oct 2019, 20:55
Forum: Workshop
Topic: 65% Model F – Open Group Build
Replies: 55
Views: 14669

Re: 65% Model F – Open Group Build

My fault for not explaining it well. The key cap "value" is not so much a problem - it is possition. Right now, there are 3 possible configurations; ISO Enter and the cap left of that, ANSI Enter and the cap above that, or 1u + 1.25u + 1.5u on the row above. I could "free up" one pad by saying that ...

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