IBM 107 FMK - IBM 107 472X-41-53951 - Lot of pictures

seebart · 02 Apr 2015, 09:43

idollar wrote: ↑ Yesterday I got a little electric shock from the keyboard. In the morning and in the afternoon.

oh I had not thought about that at all. All that exposed metal.

snoopy · 02 Apr 2015, 10:31

that's not a big problem. here's the solution:

chzel · 02 Apr 2015, 11:06

I'd think it's because you have well grounded bare metal, so any static build-up will discharge through the chassis to ground!

0100010 · 02 Apr 2015, 20:42

No shocks from mine, static or otherwise. Did you ground the case to the USB cable braided shield (like the original cable was)?

idollar · 03 Apr 2015, 07:28

I will check today the keyboard with the tester and report what is happening.
The controller is connected to the barrels board using a screw. This is contact with the case. It could be that this is not sufficient. The tester will tell us.

chzel · 03 Apr 2015, 10:11

My guess is that it is plenty sufficient. If the case was not grounded correctly, you wouldn't get shocks. You get them because you get discharged through the
case to the cable, to the psu, to electrical earth.

ramnes · 03 Apr 2015, 10:30

My name proposal: Hartman, as in reference to Full Metal Jacket.

idollar · 03 Apr 2015, 14:12

ramnes wrote: ↑My name proposal: Hartman, as in reference to Full Metal Jacket.

Added !

seebart · 03 Apr 2015, 16:34

my name proposal:

IBM 107 FMK

FMK = Full Metal Keyboard

LLRnR · 03 Apr 2015, 16:36

Not sure if you've noticed it, my name proposal is Hulk. As in full o' muscles.

idollar · 03 Apr 2015, 16:38

seebart wrote: ↑my name proposal:

IBM 107 FMK

FMK = Full Metal Keyboard

Added

idollar · 03 Apr 2015, 16:38

LLRnR wrote: ↑Not sure if you've noticed it, my name proposal is Hulk. As in full o' muscles.

webwit · 03 Apr 2015, 16:44

Margaret.

LLRnR · 03 Apr 2015, 16:46

webwit wrote: ↑Margaret.

The Wild Duck can be such a troll sometimes...

webwit · 03 Apr 2015, 16:51

The iron lady!

seebart · 03 Apr 2015, 16:54

webwit wrote: ↑The iron lady!

good one! Forget Margaret.

Redmaus · 03 Apr 2015, 17:14

Buckling Steel?
(or aluminum, whatever)

idollar · 04 Apr 2015, 11:52

All,

I have changed the entries on the pool for you to vote.

I am typing with the finished keyboard that I will open again to show you the pictures.

There are news, errors, patches, and recommendations to come with regards to the xwhatsit controller. I broke and repaired one of my keyboards ! I will try to post some more information today.

idollar · 04 Apr 2015, 21:37

added section 17

idollar · 04 Apr 2015, 21:48

... and 18

ramnes · 04 Apr 2015, 21:56

idollar wrote: ↑
ramnes wrote: ↑My name proposal: Hartman, as in reference to Full Metal Jacket.
Added !

You added Full Metal Jacket, not Hartman.

idollar · 04 Apr 2015, 22:08

I am not sure if this can be repaired without loosing the votes

Let me see.

idollar · 04 Apr 2015, 22:10

ramnes wrote: ↑
idollar wrote: ↑
ramnes wrote: ↑My name proposal: Hartman, as in reference to Full Metal Jacket.
Added !
You added Full Metal Jacket, not Hartman.

Done ... it took the risk. It did not reset the voting

idollar · 04 Apr 2015, 22:11

Added section 19 !

idollar · 04 Apr 2015, 22:37

Added section 20

Redmaus · 06 Apr 2015, 15:50

As far as the voting goes, will there be anything like an elimination round? To take the names that have no votes out and then have everyone vote on the highest voted names?

LLRnR · 06 Apr 2015, 21:24

Very clever way of fixing the broken xwhatsit controller! How did you manage to find out which cable goes where? Was everything documented in the xwhatsit manual? Anyhow, it's really impressive what you did. Others would have simply given up and bought a new controller.

idollar · 06 Apr 2015, 23:26

Redmaus wrote: ↑As far as the voting goes, will there be anything like an elimination round? To take the names that have no votes out and then have everyone vote on the highest voted names?

Good idea. I will eliminate the options that are not voted or with 1 vote after Wednesday !

idollar · 06 Apr 2015, 23:32

LLRnR wrote: ↑Very clever way of fixing the broken xwhatsit controller! How did you manage to find out which cable goes where? Was everything documented in the xwhatsit manual? Anyhow, it's really impressive what you did. Others would have simply given up and bought a new controller.

You know ... never give up

Finding where to get the cables was not really complicated. I could have asked, but reverse engineering is fun:

1.- Get the usb pinout. For instance.

https://forum.sparkfun.com/viewtopic.php?f=19&t=33227

2.- Get the PCB layout

http://uploads.oshpark.com/uploads/proj ... 58GJ/i.png

3.- Get the pinout of the atmel. This will help to find out the resistors from the other side

http://www.atmel.com/images/doc7799.pdf

Figure 1-1. Pinout

The rest is a matter of testing the resistance between the pins.

LLRnR · 06 Apr 2015, 23:56

idollar wrote: ↑ Finding where to get the cables was not really complicated. I could have asked, but reverse engineering is fun:
[...]
The rest is a matter of testing the resistance between the pins.

Great detective work!

I hope no one else gets in this sort of situation, but your approach shows that there is a fix to this mistake. Thanks for the insight!

deskthority

IBM 107 FMK - IBM 107 472X-41-53951 - Lot of pictures

Name the new born keyboard