Search found 635 matches

by DMA
19 Jan 2020, 06:00
Forum: Group buys
Topic: F62+F77 orders now open! New Kishsaver+Industrial Model F Keyboards
Replies: 4439
Views: 484865

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

tentator wrote:
18 Jan 2020, 23:11
Also the sentence were you say "So you couldn't use space for Fn" does not sound reassuring..
How about "So, now those are fixed", 5 lines down the page? :D
by DMA
18 Jan 2020, 22:43
Forum: Group buys
Topic: F62+F77 orders now open! New Kishsaver+Industrial Model F Keyboards
Replies: 4439
Views: 484865

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

Hi DMA! I've space-fn in firmware in all my keyboards a part from model Fs and beamsprings so it would be much better to have it in xwhatsit or commonsense and not need to think about os etc. I also do a lot of keyboard rotation. Do you plan to fix the tap macro in commonsense? I see it in the macr...
by DMA
18 Jan 2020, 11:25
Forum: Group buys
Topic: F62+F77 orders now open! New Kishsaver+Industrial Model F Keyboards
Replies: 4439
Views: 484865

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

XMIT wrote:
17 Jan 2020, 15:19
How would you set up SpaceFn on Windows? Someone was asking me this the other day. Not really being a Windows user I had no clue.
One word: AHK.

Also macros were fixed EONS ago.
by DMA
10 Jan 2020, 06:01
Forum: Workshop
Topic: [Done] CommonSense: matrix LCR meter with a HID interface
Replies: 538
Views: 52716

Re: [Done] CommonSense: matrix LCR meter with a HID interface

Due to a freak accident(tm) (seriously tho - I don't know how. I copy-pasted the schematics and dabbled with pin _mapping_, not _settings_) "8x24" project had rows in "strong drive. slow" instead of "pull-up/pull-down". That _may_ explain problems some people had with sense stability. The only way t...
by DMA
29 Dec 2019, 18:44
Forum: Workshop
Topic: [Done] CommonSense: matrix LCR meter with a HID interface
Replies: 538
Views: 52716

Re: [Done] CommonSense: matrix LCR meter with a HID interface

Hi DMA just wanted to clarify something. https://raw.githubusercontent.com/dmaone/CommonSense/1.0.0.4/docs/MagValve/pinout.jpg Rows start at R0 on the picture however columns start at C1. Am i right to assume that C1 should be C0 and so on? Yep. It doesn't matter though - you can't configure less t...
by DMA
29 Dec 2019, 02:16
Forum: Workshop
Topic: 65% Model F – Open Group Build
Replies: 48
Views: 4930

Re: 65% Model F – Open Group Build

I wanted to avoid LDOs as much as possible, so 3559. LDO 4.1 -> 3V has 73% efficiency, and 3559 buck is about 85%. With USB disconnected the USB component draws 0.3mA, so efficiency should not be a problem - but then there's ADC (1mA) and who knows what else. I fear to measure actual current on 3V b...
by DMA
22 Dec 2019, 04:43
Forum: Workshop
Topic: 65% Model F – Open Group Build
Replies: 48
Views: 4930

Re: 65% Model F – Open Group Build

Ah, yes, the power management. Almost forgot. BLE-power.png 3V: VddIO VddD (Lowest allowable for USB operation) & VddA (must be highest voltage on the chip) 2V VddR (radio) & VddIO 1.8V: VccD/VccA (PSoC5 LP cores). PSoC5 LP internal LDO turned off to save power. This is kind of ridiculous, but I alm...
by DMA
22 Dec 2019, 01:05
Forum: Workshop
Topic: 65% Model F – Open Group Build
Replies: 48
Views: 4930

Re: 65% Model F – Open Group Build

Exactly. I am worried about surprise removal. PCI-SIG official term, believe it or not. Does that really refer to this situation? It sounds more like a software routine to handle surprise disconnection of cards. t'was a joke. Like "Rapid Unscheduled Disassembly". "Surprise removal" is usually a dow...
by DMA
20 Dec 2019, 00:21
Forum: Workshop
Topic: 65% Model F – Open Group Build
Replies: 48
Views: 4930

Re: 65% Model F – Open Group Build

I prefer SMD connectors as they're IMO much nicer to work with, especially to remove/replace. Exactly. I am worried about surprise removal. PCI-SIG official term, believe it or not. I.e. the socket will break off the PCB before connector will break off the cable. NOT a situation I want anybody with...
by DMA
18 Dec 2019, 17:48
Forum: Workshop
Topic: 65% Model F – Open Group Build
Replies: 48
Views: 4930

Re: 65% Model F – Open Group Build

by DMA
16 Dec 2019, 05:12
Forum: Workshop
Topic: 65% Model F – Open Group Build
Replies: 48
Views: 4930

Re: 65% Model F – Open Group Build

I thought reserving 24+8 pins for projects with smaller matrices (20 total in this case) wasn't necessary, is it? Not necessary, but will need exact knowledge of matrix dimensions plus some mousing (shrink column MUX, delete pins and per-pin logics, etc). As for hub - never designed those, not even...
by DMA
15 Dec 2019, 06:40
Forum: Workshop
Topic: Keyboards, Plastic, and Static Electricity
Replies: 6
Views: 335

Re: Keyboards, Plastic, and Static Electricity

Sorry, shouldn't have posted late at night. Yes, 100R and TVS diodes at periphery, bypass caps as close to IC as possible.
by DMA
14 Dec 2019, 09:21
Forum: Workshop
Topic: Keyboards, Plastic, and Static Electricity
Replies: 6
Views: 335

Re: Keyboards, Plastic, and Static Electricity

It's 8kV, but MCUs usually require 100R resistors as close to GPIO as humanly possible to actually pass the test. dI/dt is what kills. I'm not a real EE, but I've read a lot of datasheets recently. So, not a legal advice, but.. Not an issue in practice (not a single GPIO of mine died by ESD) - but i...
by DMA
14 Dec 2019, 09:02
Forum: Workshop
Topic: Beamspring Factory process - How to
Replies: 40
Views: 4601

Re: Beamspring Factory process - How to

Quenching might make them brittle. But you have dozens and it doesn't hurt to lose a couple in the name of !!SCIENCE!!

Keep us posted!
by DMA
09 Dec 2019, 08:38
Forum: Workshop
Topic: 65% Model F – Open Group Build
Replies: 48
Views: 4930

Re: 65% Model F – Open Group Build

I was referring to J1 pins as they're needed for the pad card. I assume only 0_2, 0_3 and 0_4 are needed on J2 and the remaining 19 GPIOs could be used for other purposes, right? 8R+24C+4(ExpHdr)+2(I2C) don't leave much already. https://github.com/dmaone/CommonSense/blob/master/docs/8x24_pinout.png...
by DMA
07 Dec 2019, 10:05
Forum: Workshop
Topic: [Done] CommonSense: matrix LCR meter with a HID interface
Replies: 538
Views: 52716

Re: [Done] CommonSense: matrix LCR meter with a HID interface

Sandgrax, sorry, I may be an idiot. The current sense pin drive mode may be suboptimal as in "they will discharge the matrix too slowly and the next drive pulse arrives before transients calm down". Changed to strong drive, pushed out. Please download the new version, build and see.
by DMA
28 Nov 2019, 06:50
Forum: Workshop
Topic: Univac Keyboard (Micro Switch) - Now USB converted via custom TMK scan module!
Replies: 69
Views: 6967

Re: Univac Keyboard (Micro Switch)

so.. sensors themselves don't contribute anything to the key feel, I guess. See if you can put a SOT-23 into the switch. Or a SIP-3 - might be easier. There are hall effect sensors in those form-factors. Some of them even have a disable pin which will allow you to build a matrix out of them.
by DMA
27 Nov 2019, 03:27
Forum: Workshop
Topic: Univac Keyboard (Micro Switch) - Now USB converted via custom TMK scan module!
Replies: 69
Views: 6967

Re: Univac Keyboard (Micro Switch)

I guess you're not selecting the row, you're reading it. Took me some time to understand that this is a generating/active matrix, not a scanned/passive one. Plus a subtle possible bug - if you don't have anything pressed in a row it's not updated. If you get an ideal reading (that is, a single key i...
by DMA
24 Nov 2019, 02:04
Forum: Workshop
Topic: Xwhatsit solenoid driver alternative
Replies: 13
Views: 823

Re: Xwhatsit solenoid driver alternative

btw, https://www.seeedstudio.com/fusion.html has free PCBA for 5 PCB copies. Shouldn't be dramatically more expensive than rigging from ebay-sourced modules.
by DMA
20 Nov 2019, 17:42
Forum: Deskthority talk
Topic: Deskthority Awards 2019 ~ Phase 1: The nominations
Replies: 48
Views: 4547

Re: Deskthority Awards 2019 ~ Phase 1: The nominations

Now you MUST teespring the "I won DTA 2019 and all I've got was this lousy T-shirt" T-shirt, matt3o.
by DMA
20 Nov 2019, 03:39
Forum: Deskthority talk
Topic: Deskthority Awards 2019 ~ Phase 1: The nominations
Replies: 48
Views: 4547

Re: Deskthority Awards 2019 ~ Phase 1: The nominations

on a side note, what does a (artistic, useless) wing nut have to do with keyboards? Isn't a wing nut more reminiscent of an era when there were no computers, and hence no computer keyboards (mechanical or other)? It has an MX mount, so it's not that useless. Would make a good Esc key (if your handl...
by DMA
20 Nov 2019, 03:35
Forum: Workshop
Topic: [Done] CommonSense: matrix LCR meter with a HID interface
Replies: 538
Views: 52716

Re: [Done] CommonSense: matrix LCR meter with a HID interface

Wait, you have more than 3? Also firmware should not send anything using this particular protocol command while out of setup mode. Looks like something triggers that in main loop (I'm patting myself on the back now for adding milliseconds into log timestamps). Expect v1.0.0.6 over the weekend, proba...
by DMA
20 Nov 2019, 03:29
Forum: Workshop
Topic: Convert&Restoration project of IBM 3742 beamspring keyboard
Replies: 39
Views: 4683

Re: Convert&Restoration project of IBM 3742 beamspring keyboard

... and defect my ass DMA - it worked perfectly here :-) Like, the row 5 is mostly empty. How can it even work? ..oh, I guess I know. Firmware didn't have the sanity checker then. So if you map those empty matrix cells to [None] - you're fine, they're always pressed at matrix level but nobody cares...
by DMA
18 Nov 2019, 17:44
Forum: Workshop
Topic: Low profile Beamspring project
Replies: 34
Views: 4492

Re: Low profile Beamspring project

Flyplate.
by DMA
18 Nov 2019, 06:32
Forum: Workshop
Topic: Xwhatsit solenoid driver alternative
Replies: 13
Views: 823

Re: Xwhatsit solenoid driver alternative

9V 250mA is 450mA from 5V, assuming 100% conversion efficiency. Just the solenoid blows you out of power budget.

CS by itself consumes ~25mA, up to 36mA in some modes.
by DMA
18 Nov 2019, 00:10
Forum: Workshop
Topic: Xwhatsit solenoid driver alternative
Replies: 13
Views: 823

Re: Xwhatsit solenoid driver alternative

Personally I prefer to use a solid state relay as well. The diagram only represented the wiring against relay pins, I'll change it to a solid state relay. Also, I'll use a parallel usb for the source of power for the relay. I was a bit incorrect - relay is high-side, so it will work with a power su...
by DMA
17 Nov 2019, 19:44
Forum: Workshop
Topic: Xwhatsit solenoid driver alternative
Replies: 13
Views: 823

Re: Xwhatsit solenoid driver alternative

Erhm.. please don't drive inductive loads from GPIO. You'll fry the GPIO. They'e specced for 4mA source current and you're trying to pull SEVENTY, if datasheet doesn't lie: http://www.circuitbasics.com/wp-content/uploads/2015/11/SRD-05VDC-SL-C-Datasheet.pdf The important parts of xwhatsit's solenoid...
by DMA
16 Nov 2019, 06:49
Forum: Workshop
Topic: Low profile Beamspring project
Replies: 34
Views: 4492

Re: Low profile Beamspring project

Hmm. Plastic actually not needed in this configuration - except for PCB protection. But if no plastic - some weight must be added to the bottom part, or all the beamspring fill's gone.

Would be fun to try different plate weights.
by DMA
13 Nov 2019, 17:56
Forum: Workshop
Topic: [Done] CommonSense: matrix LCR meter with a HID interface
Replies: 538
Views: 52716

Re: [Done] CommonSense: matrix LCR meter with a HID interface

The way I used to get around this problem is labeling unpopulated stuff as DEAD in the keymap. But it's nice to see it automated Would not save you from tripping the sanity check - it happens before layout translation. R16C16 key is strange, because it's not physically possible. It's COMMONSENSE_NO...
by DMA
05 Nov 2019, 07:27
Forum: Workshop
Topic: Convert&Restoration project of IBM 3742 beamspring keyboard
Replies: 39
Views: 4683

Re: Convert&Restoration project of IBM 3742 beamspring keyboard

Heikkonen: reset delays back to 20/180 or whatever tooltip says.

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