On 29/06/10 19:26, Sébastien Bourdeauducq wrote:
Soldering wire to 16 pins on a QFP
sure sounds like a lot of fun, but with some patience I should be able to make
it...
Use a Roadrunner wiring pen loaded with the finest wire, pre-tin the
ends of the wire, and apply lots of flux (preferably
RM
Hi,
>> Anyway, maybe the simplest solution is to let Adam do it on 1-2 boards as
>> he
>> has all the tools and experience. Just in order to validate the video
>> input
Just finished 1 pcs, well...rework this like a doctor doing a surgical
operation without hand-shaking. hehe..
will rework anothe
what cable are you using?
Enameled wire scavenged from a transformer... which isn't the best
(bends too
easily during soldering). I was also planning to use wirewrap wire
but could
not find any in the (bad) electronics shops nearby. I would have to
order it.
enameled wire is actually what
On Thursday 01 July 2010 00:22:45 Bengt Sjölén wrote:
> what cable are you using?
Enameled wire scavenged from a transformer... which isn't the best (bends too
easily during soldering). I was also planning to use wirewrap wire but could
not find any in the (bad) electronics shops nearby. I would
Hi Sebastien,
I'll rework my two pcs here and send to you firstly. My concerns will
only be the noise reduction. Since those P[7:0] traces are located at
L3 and well surrounded by ground shieldings to eliminate digital
noise. This reworks mean that a short distance of them will be
exposed. Well, I
yeah that's a tricky one especially if you have little or no pad
sticking out underneath
which is often the case. and very soon you will start loosing pads too.
what cable are you using? i normally use single core thin wire wrap
wire to patch these
kind of things. i did patch one 0.5 mm pit
On Wednesday 30 June 2010 05:44:10 Adam Wang wrote:
> Directly solder wires from P[15:8] to P[7:0] on pins should be ok.
Well that's harder than I thought and I've been quite unsuccessful at it :(
Soldering wires to QFPs is not like soldering QFPs on PCB pads... short
circuits you struggle to rem
Hi,
> Since routing of P[7:0] is went through L3 inside pcb, so I suggest no
> need to cut traces on P[7:0] or directly soldering. That's a little
> kind of hard. Take apart the one on pcb first then diretly use a new
> U21, "raise up" those pins P[7:0] and P[15:8] on IC body first. Then
> hand so
Hi,
On Wed, Jun 30, 2010 at 2:26 AM, Sébastien Bourdeauducq
wrote:
> Hi,
>
> There is a stupid PCB problem with the video in pixel port: we connected
> P[7:0], but the video decoder outputs on P[15:8] when in 8-bit mode. Nobody
> spotted this one :(
Stupid. Me either.
> Since P[7:0] are high-im
Hi,
There is a stupid PCB problem with the video in pixel port: we connected
P[7:0], but the video decoder outputs on P[15:8] when in 8-bit mode. Nobody
spotted this one :(
Besides that, the decoder circuit appears to be working: the crystal
oscillator is stable and clean (checked on scope), t
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