Dell rubber dome conversion to Mechanical (Quietkey SK-8000)

SK-8K

27 Aug 2021, 01:47

I am working on this idea I had, I got a Dell Quietkey SK-8000 and I am trying to convert it into a mechanical keyboard.
I modified the case with a dremel tool and now I am working on a PCB to replace the original membrane circuits:
dqk.png
dqk.png (4.88 MiB) Viewed 1445 times
sk-800 pcb.PNG
sk-800 pcb.PNG (32.61 KiB) Viewed 1445 times
The PCB will bolt to the original backplate of the keyboard with M2 fasteners. There will be a sheet of kapton to insulate it from the PCB.

It is a slow process to probe the contacts of the membrane.

Any tips and tricks are appreciated.

Findecanor

27 Aug 2021, 12:57

If you had measured the spacing between key groups, and they had been 1/2 and 1/4 keys, then you could have used a PCB and plate for a Filco Majestouch or similar, because that is quite common.
It looks like vertical spacing between the alphanumeric section and function key row is 1/2u anyway.

BTW, are you going to use quiet switches in your QuietKey ? ;)

SK-8K

28 Aug 2021, 00:12

If this PCB design works, I will have 5 from JLCPCB. The first prototype I will use these cheap MX Blue knockoffs, so it will be a LOUD key! I do want to build some more with better switches including quiet switches like the new silent T1s.

So if anyone has junk SK-8000s, hang on to them so I can mod them in the future!

I can't use an existing PCB there is a 7.05 mm island between the key groups which isn't standard.

An ALPS version is possible in the future but it would require special plate design and more modifications to the top case. I used an ALPS/Cherry hybrid footprint on this PCB

In the future I want to do similar projects with the Dell Oval and IBM/Lenovo Preferred Pro keyboards.

SK-8K

05 Sep 2021, 02:19

PCB is now in production, hopefully I did everything right.
Capture.PNG
Capture.PNG (56.57 KiB) Viewed 1258 times

SK-8K

05 Sep 2021, 02:21

I decided to do Cherry only for now to save on drill costs. In the future I may just make my own controller board because tracing out the matrix was very stressful to do. Maybe I will use this controller:
https://www.sprintek.com/en/products/ke ... K5126.aspx

SK-8K

10 Sep 2021, 01:55

PCB test:
DSC04564.jpg
DSC04564.jpg (1.07 MiB) Viewed 1108 times
DSC04563.jpg
DSC04563.jpg (1.35 MiB) Viewed 1108 times

SK-8K

18 Sep 2021, 07:20

DSC04569.png
DSC04569.png (3.91 MiB) Viewed 1054 times
DSC04577.png
DSC04577.png (3.18 MiB) Viewed 1054 times

Rayndalf

18 Sep 2021, 13:41

SK-8K wrote:
05 Sep 2021, 02:21
I decided to do Cherry only for now to save on drill costs. In the future I may just make my own controller board because tracing out the matrix was very stressful to do. Maybe I will use this controller:
https://www.sprintek.com/en/products/ke ... K5126.aspx
I reccomend just using a pro micro and QMK.
But that might work as well.

Do you have any extra PCBs?

SK-8K

18 Sep 2021, 18:27

I have 3 extras which I will use. I am making a Revision 2 PCB which I will release to the public. It will correct some misallignment issues and hole placement and will have support for ALPS and I-Rocks switches.

On Ebay I have found some 0.6mm plastic pieces that I will use instead of the backplate.This prototype just has foam there.

SK-8K

26 Sep 2021, 03:45

2nd build started,the Dremel cuts are much cleaner this time. Switches: YOK trash pandas switches.
DSC04581.png
DSC04581.png (3.61 MiB) Viewed 786 times

SK-8K

29 Sep 2021, 02:00

Without any lubrication, foam, etc. these switches have quite a deep sound in the QuietKey chassis! It may sound better when I install the plastic sheets I got to support the PCB.

SK-8K

03 Oct 2021, 03:15

This one will be my new daily driver. Too bad the Geekhack scumbag moderators won't see it.
DSC04597.JPG
DSC04597.JPG (1.61 MiB) Viewed 493 times
4:3 gang!

Rayndalf

08 Oct 2021, 04:44

SK-8K wrote:
03 Oct 2021, 03:15
This one will be my new daily driver. Too bad the Geekhack scumbag moderators won't see it.
DSC04597.JPG
4:3 gang!
Really looks solid. Does the PCB support winkeyless as well (winkeyless Quietkeys exists but they might have a different controller/matrix)?

What happened with the GH mods? They can be a bit up tight but I haven't had any bad experiences myself.

At least GH actually has mods :lol:

User avatar
Muirium
µ

08 Oct 2021, 11:33

Rayndalf wrote:
08 Oct 2021, 04:44
At least GH actually has mods :lol:
Indeed!

I've long been on the record as one in favour of more moderation here: kicking shit-stirrers and politics trolls. (Keyboard trolling is fine.) Better and for worse, Webwit was always against intervention. I wasn't around for the Ripster Incident. I imagine it must have involved noodles.

Hopefully Someone's still deleting spam these days…

GH, meanwhile, has a longstanding reputation for dodgy moderation in its marketplace. Fingers on the scales and such.

User avatar
fohat
Elder Messenger

08 Oct 2021, 14:49

Rayndalf wrote:
08 Oct 2021, 04:44

What happened with the GH mods?
It was over a string of anti-vax related posts.

User avatar
Muirium
µ

08 Oct 2021, 15:44

Because a keyboard forum is definitely the place to go for your data on epidemiology.

SK-8K

09 Oct 2021, 01:06

It was an off-topic thread and I just casually floated some experiences and opinions on the subject because I was bored.

They shadowbanned and eventually fully-banned me when a simple "I disagree, and here's why..." would have sufficed.

Why not let fellow keyboard nerds be adults and respectfully chat, even if our opinions on a subject are radically different?

But I've moved on from all that, Deskthority and Nexthority are my home bases now to continue making cool keyboards.

Rayndalf

09 Oct 2021, 01:13

Geekhack has countless subforums. I haven't been in most of them.

They seem like weird little caves.

Post Reply

Return to “Workshop”