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[IC] a hand-held keyboard: keys at your finger tips, no chords
DonKeyShot:
--- Quote from: dvorcol on Sun, 03 December 2023, 09:12:08 ---Did you consider Cherry's MX ULP switch? It appears to be thinner, but pins aren't in the picture so maybe it's surface mount. And 65 cN force might be too high.
https://www.cherrymx.de/en/cherry-mx/mx-ultra-low-profile/mx-ulp-click.html
https://github.com/pashutk/Cherry_MX_ULP
--- End quote ---
Hi dvorcol, tnx.
We did consider ULP switches in general. But we do need some more travel. There is more play in the system than on a regular keyboard ('table' leans on hand tissue), and we would like the travel to remain relatively large i.r.t. play. That's why we are with the Kailh Low profile with 3mm travel now. We did consider the Cherry Low Profile (and still do). 3.2mm travel would be fine. Do you happen to know what distinguishes the Cherry Low Profile from the Kail Low Profile? In general, I read that Kailh may be 'less consistent'. We couldn't find Cherry Low Profile with only 20gram. But when they are significantly better, we would maybe just go for them and replace the spring. (if that doesn't increase the risk that keys hang in the pressed position) Another criterion for us is how well the key behaves when somebody is pressing the key a lot at the edge of the key rather than in the center.
gotin:
Very interesting project!! I imagine I might feel a bit disconnected from my pc tho. Nevertheless keep up the amazing work!
dvorcol:
--- Quote from: DonKeyShot on Mon, 04 December 2023, 05:42:01 ---
--- Quote from: dvorcol on Sun, 03 December 2023, 09:12:08 ---Did you consider Cherry's MX ULP switch? It appears to be thinner, but pins aren't in the picture so maybe it's surface mount. And 65 cN force might be too high.
https://www.cherrymx.de/en/cherry-mx/mx-ultra-low-profile/mx-ulp-click.html
https://github.com/pashutk/Cherry_MX_ULP
--- End quote ---
Hi dvorcol, tnx.
We did consider ULP switches in general. But we do need some more travel. There is more play in the system than on a regular keyboard ('table' leans on hand tissue), and we would like the travel to remain relatively large i.r.t. play. That's why we are with the Kailh Low profile with 3mm travel now. We did consider the Cherry Low Profile (and still do). 3.2mm travel would be fine. Do you happen to know what distinguishes the Cherry Low Profile from the Kail Low Profile? In general, I read that Kailh may be 'less consistent'. We couldn't find Cherry Low Profile with only 20gram. But when they are significantly better, we would maybe just go for them and replace the spring. (if that doesn't increase the risk that keys hang in the pressed position) Another criterion for us is how well the key behaves when somebody is pressing the key a lot at the edge of the key rather than in the center.
--- End quote ---
I personally have no deep knowledge of switches. The TypeMatrix 2030 I use when traveling has scissor switches, but I don't know if they are Cherry MX ULP.
Here are two low profile Geekhack threads if you haven't already seen them:
Cherry MX Low Profile - Review / Specs / Compability - https://geekhack.org/index.php?topic=108218.0
[IC] Pitta60 (updated compatibility test) - https://geekhack.org/index.php?topic=106970.0
As well as this from Deskthority - https://deskthority.net/wiki/File:Lpswitches.png
I find your work very interesting and will be following this thread. Best of luck!
dvorcol:
The MX-style stem on Kailh Choc V2 switches might make them more stable than the original.
DonKeyShot:
--- Quote from: dvorcol on Tue, 05 December 2023, 19:24:55 ---The MX-style stem on Kailh Choc V2 switches might make them more stable than the original.
Show Image
--- End quote ---
Hi Dvorcol, thanks for your enthusiasm and support!
If you would like to be one of the people doing early testing, you can sign up for that on the website (no guarantees though, it might matter a bit where you live. Do mention 'Dvorcol')
About the keys: indeed, I hadn't fully investigated the Kailh Low profile v2 and the Cherry Low profile, tnx for the link. I also found a good teardown of the Kailh v2 (https://keycapsss.com/switchestester/switches/125/kailh-low-profile-choc-v2-switches). The conceptual differences seem very minimal. Kailh has the spring around a pin on the stem, while Cherry has the spring around a pin on the base. This could matter. Kailh uses a 'torsion spring' (why?). Both have sockets for hot-swapping (Kailh is actually providing pcb-sockets for the MX). What is the real difference? I guess general product quality (production quality) may make a difference then if anything.
And for both: I couldn't find 20gr keys out of the box.
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