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Advice on how to re-solder a microcontroller leg?

Advice on how to re-solder a microcontroller leg?

From:
Lance Wicks
Date:
2015-08-12 @ 21:06
Hi All,

I had a working Atreus I built on the weekend. :-)

Took it to office to show colleagues, plugged it in, bottom row didn't
work. :-(

Have tried checking/reflowing all the switches and diodes along bottom row.
Nothing.

Checked/reflowed the controller; when the leg for pin 3 came out on the tip
of the iron. :-(

So presume I just did a poor solder on the controller in the first place
with the diode leg. So now I am stuck, only way I can see to solve the
problem is to solder a new leg through the board and constroller. But the
controller is sandwiched between board and the wood. So do I need to
unsolder every switch?? :-(

Thoughts/Advice?

Lance

Re: [atreus] Advice on how to re-solder a microcontroller leg?

From:
Joe Schonbok
Date:
2015-08-12 @ 21:16
If you are careful, it is possible to cut a hole in the switch plate to
access the controller.  Mark where the "tongue" of the top plate is, then
do some measuring and cut a hole - you should have room to spare from the
"tongue" line - then the hole won't show when the Atreus is assembled.  I
was able to replace my entire controller in this way.  You may be able to
get away with just making a smaller hole to access the one pin.

I used a nice, sharp pocket knife to cut along the lines I had measured
out.  Nice and slow, you don't want to scrape the blade on the controller.


On Wed, 12 Aug 2015 at 14:07 Lance Wicks <judocoach@gmail.com> wrote:

> Hi All,
>
> I had a working Atreus I built on the weekend. :-)
>
> Took it to office to show colleagues, plugged it in, bottom row didn't
> work. :-(
>
> Have tried checking/reflowing all the switches and diodes along bottom row.
> Nothing.
>
> Checked/reflowed the controller; when the leg for pin 3 came out on the
> tip of the iron. :-(
>
> So presume I just did a poor solder on the controller in the first place
> with the diode leg. So now I am stuck, only way I can see to solve the
> problem is to solder a new leg through the board and constroller. But the
> controller is sandwiched between board and the wood. So do I need to
> unsolder every switch?? :-(
>
> Thoughts/Advice?
>
> Lance
>
>

Re: [atreus] Advice on how to re-solder a microcontroller leg?

From:
Lance Wicks
Date:
2015-08-12 @ 21:32
Thanks gentlemen,
I have a solder "sucker" and will attempt that in the first instance, then
the hole method if necessary.

Thanks

On Wed, Aug 12, 2015 at 10:16 PM, Joe Schonbok <joebok@gmail.com> wrote:

> If you are careful, it is possible to cut a hole in the switch plate to
> access the controller.  Mark where the "tongue" of the top plate is, then
> do some measuring and cut a hole - you should have room to spare from the
> "tongue" line - then the hole won't show when the Atreus is assembled.  I
> was able to replace my entire controller in this way.  You may be able to
> get away with just making a smaller hole to access the one pin.
>
> I used a nice, sharp pocket knife to cut along the lines I had measured
> out.  Nice and slow, you don't want to scrape the blade on the controller.
>
>
> On Wed, 12 Aug 2015 at 14:07 Lance Wicks <judocoach@gmail.com> wrote:
>
>> Hi All,
>>
>> I had a worki ng Atreus I built on the weekend. :-)
>>
>> Took it to office to show colleagues, plugged it in, bottom row didn't
>> work. :-(
>>
>> Have tried checking/reflowing all the switches and diodes along bottom
>> row.
>> Nothing.
>>
>> Checked/reflowed the controller; when the leg for pin 3 came out on the
>> tip of the iron. :-(
>>
>> So presume I just did a poor solder on the controller in the first place
>> with the diode leg. So now I am stuck, only way I can see to solve the
>> problem is to solder a new leg through the board and constroller. But the
>> controller is sandwiched between board and the wood. So do I need to
>> unsolder every switch?? :-(
>>
>> Thoughts/Advice?
>>
>> Lance
>>
>>

Re: [atreus] Advice on how to re-solder a microcontroller leg?

From:
Phil Hagelberg
Date:
2015-08-13 @ 00:57
Lance Wicks <judocoach@gmail.com> writes:

> I have a solder "sucker" and will attempt that in the first instance,
> then the hole method if necessary.

Yeah, unfortunately if the pin came all the way out, there's not much
you can do without reaching the inside. I would caution against cutting
a hole for the whole controller, (due to the impact this would have on
the overall strength of the board) but if you only have to reach a
single pin it wouldn't be so bad. But if you already have a solder
sucker, then that's the safer route; just takes longer.

Sorry to hear you're having trouble; hope you're able to get it sorted
out. Do let me know if you have any more trouble.

good luck,
Phil

Re: [atreus] Advice on how to re-solder a microcontroller leg?

From:
Lance Wicks
Date:
2015-08-13 @ 07:40
Thanks again.
Part of the reason I got the kit was to get some soldering experience, so I
choose to look at this as getting extra value from the kit. ;-)

I shall be attempting the desolder all the switches approach and if that
does not work I might consider the cutting a hole idea... but I doubt I
trust myself not to do permanent damage.

Wish me luck and thanks for the support.

Lance

On Thu, Aug 13, 2015 at 1:57 AM, Phil Hagelberg <phil@hagelb.org> wrote:

> Lance Wicks <judocoach@gmail.com> writes:
>
> > I have a solder "sucker" and will attempt that in the first instance,
> > then the hole method if necessary.
>
> Yeah, unfortunately if the pin came all the way out, there's not much
> you can do without reaching the inside. I would caution against cutting
> a hole for the whole controller, (due to the impact this would have on
> the overall strength of the board) but if you only have to reach a
> single pin it wouldn't be so bad. But if you already have a solder
> sucker, then that's the safer route; just takes longer.
>
> Sorry to hear you're having trouble; hope you're able to get it sorted
> out. Do let me know if you have any more trouble.
>
> good luck,
> Phil
>

Re: [atreus] Advice on how to re-solder a microcontroller leg?

From:
Andrew Griffith
Date:
2015-08-12 @ 21:14
Lance,

Well, I don't have any magic tricks.  You are probably right about having
to remove the switches, surprisingly it isn't that bad if you have a good
solder extractor.  If not it can take a while.

I have one of these.  5 bucks can save you a lot of time.

https://www.adafruit.com/products/148

Just a suggestion.  Hopefully there is a magic trick out there and I can
learn something new.

Andrew

On Wed, Aug 12, 2015 at 2:06 PM, Lance Wicks <judocoach@gmail.com> wrote:

> Hi All,
>
> I had a working Atreus I built on the weekend. :-)
>
> Took it to office to show colleagues, plugged it in, bottom row didn't
> work. :-(
>
> Have tried checking/reflowing all the switches and diodes along bottom row.
> Nothing.
>
> Checked/reflowed the controller; when the leg for pin 3 came out on the
> tip of the iron. :-(
>
> So presume I just did a poor solder on the controller in the first place
> with the diode leg. So now I am stuck, only way I can see to solve the
> problem is to solder a new leg through the board and constroller. But the
> controller is sandwiched between board and the wood. So do I need to
> unsolder every switch?? :-(
>
> Thoughts/Advice?
>
> Lance
>
>