[sdiy] Need help with a SMD kit (OT?)

[Quincas Moreira]

right on

On Tue, Jul 18, 2017 at 6:10 PM, <rsdio at audiobanshee.com> wrote:

> Sure, it's not that hard. I have soldering tweezers for SMD resistors,
> capacitors, and even ICs up to 14-pin. But at a certain point you reach
> diminishing returns. There is time and money invested, and I'd rather save
> my time and money for things that I cannot pay someone else to do. I make a
> whole lot more progress towards my electronics goals by avoiding 99% of SMD
> work.
>
> I will admit that it's good to spend some amount of time honing the
> skills. I recently designed a board with an optional op-amp that ended up
> performing worse than a straight connection. Fortunately, I design the PCB
> with traces for a SMD jumper so I could remove the op-amp and still connect
> the signal directly. I did that rework myself, because removing an 8-pin
> SMD and adding a two-conductor 0-Ohm resistor was a cinch. So, there's a
> balance between doing a lot of manual SMD versus just hitting a couple of
> parts for a quick mod.
>
> Brian
>
>
> On Jul 18, 2017, at 3:57 PM, Quincas Moreira <quincas at gmail.com> wrote:
> > Oh, c'mon it's not that hard, just takes some getting used to! I've only
> done the Ornament and Crime so far, but I'm looking forward to more :)
> >
> > On Tue, Jul 18, 2017 at 5:17 PM, <rsdio at audiobanshee.com> wrote:
> >> Same here. I just pay shops like Printed Circuits Assembly Corp. or
> Schippers & Crew to do SMD work. They have all the tools, microscopes, and
> experience. PCA will also do rework, which I take advantage of when
> replacing a component with more than two leads.
> >>
> >> I realize that not every city has multiple assembly shops, and some
> don't even have one, but these services are becoming available remotely.
> Advanced Circuits (4PCB.com) offer services where they'll make the PCB and
> stuff the parts for you. Not sure about the prices there, but it's got to
> be cheaper than buying the tools yourself and losing money every time you
> make a mistake. It's probably a bit difficult to get a kit made, but it's
> worth requesting a quote.
> >>
> >> I once needed a pull-up resistor added to a 144-pin DSP, and PCA asked
> if they could use any size resistor. I agreed, and when it came back, the
> flying wire and resistor were so small (0201) that I couldn't see them.
> Saved me from spinning the board for that one change, and also saved me
> from the risk of ruining one of only two prototypes that I had.
> >>
> >> Brian
> >>
> >> On Jul 18, 2017, at 2:23 PM, David G Dixon <dixon at mail.ubc.ca> wrote:
> >> > This post sums up why I simply will not do SMD by hand.  Not...
> worth... the... frustration.
> >> >
> >> > From: Synth-diy On Behalf Of Elain Klopke
> >> > Sent: Tuesday, July 18, 2017 12:16 AM
> >> > To: *SYNTH DIY
> >> > Subject: [sdiy] Need help with a SMD kit (OT?)
> >> >
> >> > Hey list,
> >> >
> >> > I bought the Elements diy kit from Synthcube and managed to get all
> the surface mount components attached using solder paste, a tiny syringe,
> and a hot plate. Everything melted nicely and I only burnt the solder mask
> a bit because I wasn't quick enough getting it off the hot plate, but the
> copper traces appear to be still attached to the board so I'm not too
> worried.
> >> >
> >> > And then the problems started. I let the board cool down and then
> started going about eliminating solder bridges on a couple of the ICs. I
> cleaned up one side of the microcontroller and then made the other three
> worse. I got one chip that was a little crooked seated properly and then
> another popped free and I couldn't get it resoldered.
> >> >
> >> > I've stepped away from the kit so I don't do more damage or throw it
> against the wall in frustration.
> >> >
> >> > Is there anyone experienced in surface mount soldering (preferably in
> the US) that would be willing to fix this mess for me. I'm way out of my
> depth and am willing to pay postage both ways and a fee for your time.
> >> >
> >> > Thanks in advance.
> >> >
>
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>



-- 
Quincas Moreira
Test Pilot at VBrazil Modular
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