ADI KI-5170
- HaaTa
- Master Kiibohd Hunter
- Location: San Jose, California, USA
- Main keyboard: Depends the day
- Main mouse: CST L-TracX
- Favorite switch: Fujitsu Leaf Spring/Topre/BS/Super Alps
- DT Pro Member: 0006
- Contact:
To commemorate the 3rd Annual Deskthority Awards, I'm going to completely take over the Photos & Videos column on the frontpage
The next keyboard, an ADI KI-5170, is actually something found by a fellow DT member vedranius.
But was willing to part with it
Another interesting thing about this keyboard, is that it uses the same Magnetic Valve sense mechanism as MouseFan's IMS keyboard. However, I don't see IMS anywhere on the keyboard. Only traces of a company called Advanced Datum Information Corp. (ADI) and the company branding of OAK on the PCB (likely the company contracted to make the PCB).
The switch design is lower profile than MouseFan's, but the actuation mechanism (Magnetic Valve mechanism) is the same.
I did a forum post (that really needs to become a wiki) here. Even though there is no magnet in this switch, magnetism is still used. Just consider the top and bottom of the PCB around each ferrite pole to be a single loop electromagnet. And when the ferrite crosses both of the loops, the magnetism flows from one loop to the other, causing a flow of electrons to change on one of the loops (non-driven one). This causes a voltage difference that can be monitored.
The next keyboard, an ADI KI-5170, is actually something found by a fellow DT member vedranius.
But was willing to part with it
Another interesting thing about this keyboard, is that it uses the same Magnetic Valve sense mechanism as MouseFan's IMS keyboard. However, I don't see IMS anywhere on the keyboard. Only traces of a company called Advanced Datum Information Corp. (ADI) and the company branding of OAK on the PCB (likely the company contracted to make the PCB).
The switch design is lower profile than MouseFan's, but the actuation mechanism (Magnetic Valve mechanism) is the same.
I did a forum post (that really needs to become a wiki) here. Even though there is no magnet in this switch, magnetism is still used. Just consider the top and bottom of the PCB around each ferrite pole to be a single loop electromagnet. And when the ferrite crosses both of the loops, the magnetism flows from one loop to the other, causing a flow of electrons to change on one of the loops (non-driven one). This causes a voltage difference that can be monitored.
- Daniel Beardsmore
- Location: Hertfordshire, England
- Main keyboard: Filco Majestouch 1 (home)/Poker II backlit (work)
- Main mouse: MS IMO 1.1
- Favorite switch: Probably not whatever I wrote here
- DT Pro Member: -
- Contact:
Funny, I created that as an unknown switch the other day:
[wiki]USw EXBB01[/wiki]
"OAK" is probably the company who make the PCB substrate, which is why it's written all over the PCB below the copper layer. I've seen a few unrelated PCBs with Oak substrate. Looks like they may be Oak-Mitsui now.
[wiki]USw EXBB01[/wiki]
"OAK" is probably the company who make the PCB substrate, which is why it's written all over the PCB below the copper layer. I've seen a few unrelated PCBs with Oak substrate. Looks like they may be Oak-Mitsui now.
- XMIT
- [ XMIT ]
- Location: Austin, TX area
- Main keyboard: XMIT Hall Effect
- Main mouse: CST L-Trac Trackball
- Favorite switch: XMIT 60g Tactile Hall Effect
- DT Pro Member: 0093
Sorry to be a thread necro, but it turns out that "9e7b" is one of these too.
http://coronthica.com/by-uuid/9e7b7d74- ... f40501f98/
It's a full ANSI layout, looks exactly like a Cherry board, uses MX mount key switches, and is apparently magnetic valve.
This will probably be one of my next restoration projects. Sadly the second row from the bottom just does not work which suggests some PCB damage to me.
NCR GmbH
WORKST.KEYBC.US-ENGL. 3299-K430-V00
FCC ID BR88YWKI-6152
http://coronthica.com/by-uuid/9e7b7d74- ... f40501f98/
It's a full ANSI layout, looks exactly like a Cherry board, uses MX mount key switches, and is apparently magnetic valve.
This will probably be one of my next restoration projects. Sadly the second row from the bottom just does not work which suggests some PCB damage to me.
NCR GmbH
WORKST.KEYBC.US-ENGL. 3299-K430-V00
FCC ID BR88YWKI-6152
- seebart
- Offtopicthority Instigator
- Location: Germany
- Main keyboard: Rotation
- Main mouse: Steelseries Sensei
- Favorite switch: IBM capacitive buckling spring
- DT Pro Member: 0061
- Contact:
Cool, thank you for sharing your information.XMIT wrote: ↑Sorry to be a thread necro, but it turns out that "9e7b" is one of these too.
- ramnes
- ПБТ НАВСЕГДА
- Location: France
- Main keyboard: 35g BKE FC660C
- Main mouse: SteelSeries Kana v2
- Favorite switch: Beamspring
- DT Pro Member: -
Same thing?
http://www.ebay.com/itm/201528290685
http://www.ebay.com/itm/201528290685
-
- Location: United Kingdom
- Main keyboard: IBM Bigfoot + Arduino
- Main mouse: Kensington Orbit Trackball
- Favorite switch: IBM Model F buckling spring
- DT Pro Member: -
Hi Chyros, yes it looks to me as if it is magnetic induction, not Hall effect. I guess that this type of switch took advantage of the tiny ferrite cores manufactured for magnetic core memory that was dominant during the 1970's. The ferrite toroids must have been easily available and very cheap at the time. This changed in the 1980's with integrated circuits ousting magnetic core for RAM.Chyros wrote: ↑Wait, isn't this inductive rather than magnetic valve? (although that uses induction too)
HaaTa posted a few patent papers too, a while back
So, switch type categories are:
- resistive (mechanical contact, membrane)
- magneto-resistive (reed switches + moving magnet)
- capacitive (foil+foam, beam-spring, IBM Model F, Topre dome+spring)
- magnetic Hall-effect
- magnetic inductive (this keyboard shown here)
- optical
- XMIT
- [ XMIT ]
- Location: Austin, TX area
- Main keyboard: XMIT Hall Effect
- Main mouse: CST L-Trac Trackball
- Favorite switch: XMIT 60g Tactile Hall Effect
- DT Pro Member: 0093
Don't forget acoustic, HaaTa found one example of this.
There are three categories of magnetic inductive that come to mind:
- axial, e.g. two wires go through the axis of a ferrite toroid and a nearby magnet influences the inductive transmission of a pulse. This is what we usually call "magnetic valve".
- through, e.g. a PCB has circumferential traces on two sides that are coupled by a magnet. That's what this board is.
- planar, e.g. a PCB has spiral traces on one side that are coupled by a magnet.
Magnetism!
There are three categories of magnetic inductive that come to mind:
- axial, e.g. two wires go through the axis of a ferrite toroid and a nearby magnet influences the inductive transmission of a pulse. This is what we usually call "magnetic valve".
- through, e.g. a PCB has circumferential traces on two sides that are coupled by a magnet. That's what this board is.
- planar, e.g. a PCB has spiral traces on one side that are coupled by a magnet.
Magnetism!
Last edited by XMIT on 01 Mar 2016, 16:22, edited 1 time in total.
-
- Location: United Kingdom
- Main keyboard: IBM Bigfoot + Arduino
- Main mouse: Kensington Orbit Trackball
- Favorite switch: IBM Model F buckling spring
- DT Pro Member: -
-
- Location: JAPAN
- Main keyboard: Model M, dodoo dome keyboard,CherryMX numeric pad
- Main mouse: logitech Master,M705 and 3 Logitech mice
- Favorite switch: ff
- DT Pro Member: -
Thanks the details and photos. Here's the keyboard FCCID BR88YWKI-5170.
- alh84001
- v.001
- Location: EU-HR-ZG
- Main keyboard: unsaver
- Main mouse: logitech m305 / apple trackpad
- Favorite switch: BS
- DT Pro Member: -
One other interesting thing to me are the keycap legends on the board in OP. They indicate it was made for Ex-Yugoslavian market. I wonder what the source was.