Search found 935 matches

by snacksthecat
Today, 03:54
Forum: Gallery
Topic: A Comparison of SSKs
Replies: 16
Views: 324

Re: A Comparison of SSKs

Here is my industrial

1395682 (industrial, USA)
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by snacksthecat
14 Jun 2019, 23:03
Forum: Workshop
Topic: Blue Alps Destructive Testing
Replies: 6
Views: 377

Re: Blue Alps Destructive Testing

I don't know if this has been linked before but I did find this patent https://patents.google.com/patent/JPH06122889A/en?q=silicone%2c+grease%2c&assignee=alps+electric%2c&before=priority:19921231&after=priority:19920101&oq=alps+electric%2c+silicone%2c+grease%2c+1992 This website has some additional...
by snacksthecat
14 Jun 2019, 22:01
Forum: Workshop
Topic: Univac Keyboard (Micro Switch)
Replies: 49
Views: 1824

Re: Univac Keyboard (Micro Switch)

Just a couple of updates. I've still been unable to get TMK working with the "pulse" type switches. I think the pulse it gives off is just too brief and is getting filtered out by the firmware or something. I've not ventured deep into the belly of TMK to see if this is actually correct. I've just be...
by snacksthecat
13 Jun 2019, 16:45
Forum: Workshop
Topic: IBM 029 keypunch keyboard repair and conversion
Replies: 5
Views: 265

Re: IBM 029 keypunch keyboard repair and conversion

Punch card keyboards are the new beamspring! Get 'em while they're hot!

Seriously though, this is some really impressive work. I only had time to skim right now but I'll be reading this on the train ride home today for sure.
by snacksthecat
12 Jun 2019, 04:42
Forum: Workshop
Topic: Univac Keyboard (Micro Switch)
Replies: 49
Views: 1824

Re: Univac Keyboard (Micro Switch)

I would smooth the housing and glue a new piece from the outside, something like that: https://media.discordapp.net/attachments/449814712008310796/582607457365262357/unknown.png Sorry, I can't use Solidworks right now. Huge thank you for this idea, Placa. I tried it out on one switch tonight and it...
by snacksthecat
12 Jun 2019, 03:56
Forum: Deskthority talk
Topic: Shall we have a DTA 2019?
Replies: 40
Views: 1729

Re: Shall we have a DTA 2019?

In all seriousness, something to encourage selling/buying here would be great IMO. I don't know the right vehicle to accomplish that but I think it'd be nice. A lot of cool stuff that people sell (myself included) gets instead posted to reddit/ebay/gh/etc. because they have more active marketplaces.
by snacksthecat
11 Jun 2019, 20:30
Forum: Keyboards
Topic: Computer Reset Adventure!
Replies: 16
Views: 711

Re: Computer Reset Adventure!

You... you got a white whale. I also couldn't help but noticing that Quattro manual over there. Had I gone there, even thinking in "keyboards only" terms, I'd have gotten that manual. Quattro is the spreadsheet that should have been the dominant one in the market until this day, not Excel. Oh, well...
by snacksthecat
11 Jun 2019, 01:03
Forum: Workshop
Topic: Univac Keyboard (Micro Switch)
Replies: 49
Views: 1824

Re: Univac Keyboard (Micro Switch)

It's counterintuitive, but a lower temperature on the (de)soldering tool can actually put more heat into the part. From decades of PC board work I've learned that it's better to get in and out quickly, which is easier with a higher temp iron. I use an old Weller station with an 800 degree (F) tip m...
by snacksthecat
10 Jun 2019, 23:48
Forum: Workshop
Topic: Blue Alps Destructive Testing
Replies: 6
Views: 377

Re: Blue Alps Destructive Testing

I feel like there are some Alps experts here who could answer your question(s).

Lure them in with more promises of science!

“It’s like 23andMe for keyboards”
by snacksthecat
10 Jun 2019, 23:44
Forum: Workshop
Topic: Using superglue as invincible clearcoat/powdercoat
Replies: 2
Views: 242

Re: Using superglue as invincible clearcoat/powdercoat

Super glue makes my skin crawl. Do you really have a supplier? You must use a lot of super glue!

Good read. I hope you post more results.
by snacksthecat
10 Jun 2019, 20:33
Forum: Workshop
Topic: Omron75, the year of B3G-S omrons
Replies: 24
Views: 1093

Re: Omron75, the year of B3G-S omrons

Excellent write-up. Your hard work paid off in the end result, for sure. Also this warning hit home for me. I unknowingly ruined a good percentage of my board's micro switch SD sensors desoldering them the other day Unless you have a professional desoldering gun, I do not suggest harvesting these sw...
by snacksthecat
10 Jun 2019, 03:09
Forum: Workshop
Topic: IBM 5251 restoration (rebuilding phase)
Replies: 38
Views: 2047

Re: IBM 5251 restoration (rebuilding phase)

Holy cats. It's the nickel plating. I have a second 5251 that I finally brought out of storage. I swapped different parts in and outbetween the two boards. For instance, I tried the "new" pcb with the old plate/switches. It kind of worked, but the bottom row was dead and the voltage threshold didn't...
by snacksthecat
09 Jun 2019, 20:29
Forum: Workshop
Topic: Univac Keyboard (Micro Switch)
Replies: 49
Views: 1824

Re: Univac Keyboard (Micro Switch)

I think I've figured out the cause of the dead switches. Unfortunately there's no way (at least I don't think) to bring them back. I wanted to share what I've learned in case it helps others avoid this mistake. Nothing I'm suggesting involves extra work so I don't see any reason not to implement the...
by snacksthecat
09 Jun 2019, 19:49
Forum: Group buys
Topic: GB] Vintage cable by SantiGo R2 (V2) GB CLOSE 18 JUNE 12.00 pm EDT
Replies: 9
Views: 370

Re: GB] Vintage cable by SantiGo R2 (V2) opens June 11

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Just received my cables from your first run. You did a fantastic job on these! I'd definitely recommend suggest anyone to get in on round 2 if they missed the first run!
by snacksthecat
07 Jun 2019, 21:39
Forum: Workshop
Topic: IBM 5251 restoration (rebuilding phase)
Replies: 38
Views: 2047

Re: IBM 5251 restoration (rebuilding phase)

Hi, that is most unfortunate. It sort of looks like the traces above your last shot corroded away? I would imagine if that is so they would not return signal. It would cost you perhaps $50 +import/etc but you could always make a new PCB for it. I have had success making new beamspring PCBs with DMA...
by snacksthecat
07 Jun 2019, 17:42
Forum: Workshop
Topic: IBM 5251 restoration (rebuilding phase)
Replies: 38
Views: 2047

Re: IBM 5251 restoration (rebuilding phase)

SneakyRobb wrote:
07 Jun 2019, 16:36
Isn't the silver there the solder finish to protect the copper trace layer under from oxidation? I wonder if this will affect long term connectivity.
Yeah, unfortunately it still doesn't work with xwhatsit. Not sure what to do from here.
by snacksthecat
07 Jun 2019, 06:01
Forum: Workshop
Topic: IBM 5251 restoration (rebuilding phase)
Replies: 38
Views: 2047

Re: IBM 5251 restoration (rebuilding phase)

I'll have to do a deep cleaning of the edge connector. It is in pretty bad shape. Luckily this junk comes off pretty easily with a little bit of alcohol and something pokey.

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by snacksthecat
07 Jun 2019, 04:43
Forum: Workshop
Topic: Univac Keyboard (Micro Switch)
Replies: 49
Views: 1824

Re: Univac Keyboard (Micro Switch)

9r2OIIdBAdE TMK is actually handling this really well. I'm not really able to observe any issues at all which is really cool. One thing I found interesting is that the keypresses weren't registering at all until I set debouce to 5. And I thought I'd read that these are "debounceless" switches. I'm ...
by snacksthecat
06 Jun 2019, 16:31
Forum: Workshop
Topic: Univac Keyboard (Micro Switch)
Replies: 49
Views: 1824

Re: Univac Keyboard (Micro Switch)

I suspect the "dead" switch are those where you classified both pins as row or both pins as column. That way your loop will not be able to read them. That's definitely possible, maybe even likely. I unfortunately haven't gotten back around to see why those keys weren't registering. I did however ge...
by snacksthecat
05 Jun 2019, 23:59
Forum: Workshop
Topic: IBM 5251 restoration (rebuilding phase)
Replies: 38
Views: 2047

Re: IBM 5251 restoration (rebuilding phase)

Interesting. Seems a little risky to me given there is minimal stock to replace them if you mess up (from Orihalcon at $10 each). Did you bend the fly plate in the image? I can't recall if I bent that one or if it was like that. I decided to just do it because the keys felt uneven. To be honest, ab...
by snacksthecat
05 Jun 2019, 22:10
Forum: Workshop
Topic: TMK keyboard firmware collection
Replies: 301
Views: 42738

Re: TMK keyboard firmware collection

Unfortunately disabling bootmagic didn't work. I'll keep playing around with different things.

The pcb is an Alps plate spring pcb that I designed (using your kicad libraries btw). It's really not at all comparable to GH60. I just used that project as a starting point.
by snacksthecat
05 Jun 2019, 14:59
Forum: Workshop
Topic: TMK keyboard firmware collection
Replies: 301
Views: 42738

Re: TMK keyboard firmware collection

Hi, I'm hoping someone may be able to help me. I'm facing an issue that I haven't seen before. I made a PCB that uses atmega32u4 MCU. I built TMK starting from the gh60 project and modifying it to my board. TMK builds appears to build fine with no warnings. Flashing also looks to be successful, eith...
by snacksthecat
04 Jun 2019, 23:48
Forum: Workshop
Topic: IBM 5251 restoration (rebuilding phase)
Replies: 38
Views: 2047

Re: IBM 5251 restoration (rebuilding phase)

I haven't seen it talked about before but what are people's thoughts on "tuning" the switches in your beamspring? Everyone is familiar with this page out of the IBM manuals that explain how to reassemble individual key switches. But I never really stopped to read the part about bending the fly plate...
by snacksthecat
02 Jun 2019, 18:46
Forum: Workshop
Topic: Univac Keyboard (Micro Switch)
Replies: 49
Views: 1824

Re: Univac Keyboard (Micro Switch)

I wrote a very simple arduino sketch that implements the "scan/scan" logic to read key presses and outputs the row and column numbers to console. const int rowPins[] = { 27, 0, 1 }; const int rowPinCount = (sizeof(rowPins) / sizeof(rowPins[0])); const int colPins[] = { 2, 3, 4, 5, 6, 7, 8, 9, 10, 11...
by snacksthecat
02 Jun 2019, 18:19
Forum: Workshop
Topic: IBM 5251 restoration (rebuilding phase)
Replies: 38
Views: 2047

Re: IBM 5251 restoration (rebuilding phase)

On Friday my girlfriend randomly said to me "let's finish putting the boomspring back together". I cant exactly argue with that! I guess 2mm foam is recommended for this part but I didn't have that. We made a trip to Michael's (craft store) and Walmart but neither place had sheets large enough. So I...
by snacksthecat
02 Jun 2019, 02:31
Forum: Keyboards
Topic: Cursed model F thread
Replies: 88
Views: 2771

Re: Cursed model F thread

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Keyboard is curse how fix?
by snacksthecat
01 Jun 2019, 19:37
Forum: Workshop
Topic: Univac Keyboard (Micro Switch)
Replies: 49
Views: 1824

Re: Univac Keyboard (Micro Switch)

i think that the modifiers and other keys you mentioned used different sensors the wiki article mentions several types so that would expplain the different layout for those keys Yes, definitely. On my board, the alphas are the "pulse" variety and the modifiers are the "hold" variety. From what othe...
by snacksthecat
01 Jun 2019, 02:27
Forum: Workshop
Topic: Univac Keyboard (Micro Switch)
Replies: 49
Views: 1824

Re: Univac Keyboard (Micro Switch)

I think what makes this particular board so tricky is that they handled a lot of the typing logic in hardware. For example, the modifiers, return key, and top keys are all hooked up in a totally different way. So I can't figure out why sometimes they have one switch's output going to another switche...
by snacksthecat
01 Jun 2019, 01:06
Forum: Workshop
Topic: Univac Keyboard (Micro Switch)
Replies: 49
Views: 1824

Re: Univac Keyboard (Micro Switch)

Thank you @listofoptions and @Anakey for answering my questions. But no one answered the question about why some lines have no pull up resistor on them. Then, this morning on my commute to work I was digging for more information. That's when I got hit in the face with this brain buster.... https://i...
by snacksthecat
31 May 2019, 03:11
Forum: Workshop
Topic: Univac Keyboard (Micro Switch)
Replies: 49
Views: 1824

Re: Univac Keyboard (Micro Switch)

Time for more of Dave's stupid questions. Stupid Question #1: I guess these are spec'd for 6.8k resistors. Is it okay to instead use the internal pull-up resistors from a teensy? Seems to work fine but I don't understand electricity. Stupid Question #2: Does pin 1 have to connect to pin 1, pin 2 to ...

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