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Optional lacquered case

Optional lacquered case

From:
Phil Hagelberg
Date:
2015-05-02 @ 11:14
Hello folks.

I just constructed a keyboard using a wood finishing technique that I
thought I'd share. I applied several coats of lacquer and wet-sanded in
between, then used the normal wax/oil mixture as a kind of polish. It is
a lot more work than the method outlined in the assembly guide, but the
finish feels very nice and has a great shine to it:

  http://atreus.technomancy.us/i/lacquer.gif

Getting this done took a few days of coating and waiting for things to dry,
so I don't think it would be a good idea to recommend it as the default
way to go. Plus logistically it would be very difficult to include
lacquer in the kit, so realistically this is going to require a separate
trip to a hardware store. But for folks with extra patience or those who
already have woodworking skills it could be a nice additional step.

I'm interested in feedback on the case instructions here, especially
From folks who have experience woodworking:

  http://atreus.technomancy.us/case.pdf

For those of you who have already constructed your case, the special
finishing only needs to be applied to the outer two surfaces of the
keyboard, so you could replace these even after your keyboard has been
constructed. If you have a local laser cutter, you could have two
additional case pieces cut there, but if there is a lot of demand I may
consider selling just the top and bottom pieces separately to those who
already have one.

thanks,
Phil

Column shorting out

From:
Joe Fiorini
Date:
2015-05-03 @ 03:54
I've been having an issue lately with my keyboard. The E/D/C/Meta column
shorts out occassionally. It seems to happen more after prolonged use
(near the end of a work day). If I hit one of the keys repeatedly
eventually it comes back, but it's quite annoying to have them go out on
me.

I've checked the solder job on that column and it seems solid. What else
could cause a problem like this? Bad diode?

Re: [atreus] Column shorting out

From:
Phil Hagelberg
Date:
2015-05-04 @ 04:31
Joe Fiorini <joe@joefiorini.com> writes:

> I've checked the solder job on that column and it seems solid. What else
> could cause a problem like this? Bad diode?

I have had this happen to me on hand-wired boards before, but it's
surprising that it could happen with the PCB too.

FWIW a bad diode would only cause keys to go dead, not to read spurious
presses. What's happening here is that column 9 is spuriously becoming
grounded somehow. The odd thing is that neither the pin on the
microcontroller nor the traces leading to it are anywhere near the
ground pin of the microcontroller. The only thing I could think of is
that it's shorting out against the USB connector somehow, so check for
that. The problem is that if it's not something that's happening all the
time it can be tricky to track down with a multimeter.

Hope that helps.

-Phil

Re: [atreus] Column shorting out

From:
Joe Fiorini
Date:
2015-05-17 @ 21:22
An update: I have fixed this problem. Turns out it was my bad soldering
job on the diodes causing the problem. They weren't loose, but sticking
out enough that putting a little pressure on the key bed was
(speculating here) pressing the diodes into the PCB and causing a
connection to be made (my best guess as to why, not positive).

I bent the diodes flat to the board and the EDC column is no longer
shorting out.

Oops.

-- 
Joe Fiorini

On Mon, May 4, 2015, at 12:31 AM, Phil Hagelberg wrote:
> Joe Fiorini <joe@joefiorini.com> writes:
> 
> > I've checked the solder job on that column and it seems solid. What else
> > could cause a problem like this? Bad diode?
> 
> I have had this happen to me on hand-wired boards before, but it's
> surprising that it could happen with the PCB too.
> 
> FWIW a bad diode would only cause keys to go dead, not to read spurious
> presses. What's happening here is that column 9 is spuriously becoming
> grounded somehow. The odd thing is that neither the pin on the
> microcontroller nor the traces leading to it are anywhere near the
> ground pin of the microcontroller. The only thing I could think of is
> that it's shorting out against the USB connector somehow, so check for
> that. The problem is that if it's not something that's happening all the
> time it can be tricky to track down with a multimeter.
> 
> Hope that helps.
> 
> -Phil
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