[sdiy] pros and cons of SMT in DIY

[Vladimir Pantelic]

rather than superglue, maybe use something like this to tack down the wires:

https://www.amazon.com/MG-Chemicals-Silicone-Modified-Conformal/dp/B008O9YIV6

it can be even soldered through for subsequent repairs/mods...



On 20.05.2017 17:15, Richie Burnett wrote:
> Paula, when you say "working with 0402", do you mean replacing the odd
> component here and there, or soldering 100s of SMT parts on?  And how
> are you actually doing the soldering?  With a fine tipped soldering iron
> and a steady hand?  ...heater tweezers?  ...or stencilling solder paste
> onto the board then placing components into the paste and ovening the
> board?  Just curious what methods you're using, particularly to get
> consistent results with those tiny QFNs.
> 
> I can also vouch for the structural integrity of super-gluing down
> wire-wrapping wire or polyurethane enamelled copper (magnet wire) for
> mods to PCBs.  Never seen one fail, and they're almost impossible to rip
> up if you need to.  I've never felt entirely happy with the fumes given
> off when someone has to solder in an area of the board polluted with
> dried Cyanoacrylate glue though.  I remember doing this once and leaping
> backwards with my eyes and nose stinging!  Can any of the chemists on
> this list comment on what vapours are liberated when a hot soldering
> iron touches cured Cyanoacrylate glue?  (I appreciate that I should
> already have been soldering in an area with positive airflow away from
> me, extraction to outdoors, etc...)
> 
> -Richie,
> 
> -----Original Message----- From: paula at synth.net
> Sent: Saturday, May 20, 2017 3:45 PM
> To: cheater00 cheater00
> Cc: Synth DIY
> Subject: Re: [sdiy] pros and cons of SMT in DIY
> 
> On 2017-05-20 03:42, cheater00 cheater00 wrote:
>> Yes, a TH pcb will be able to hold a daughter pcb just by the
>> through-holes, whereas SMD pads will not hold one. So you can easily
>> change topology using an extra pcb on a TH circuit but not on an SMT
>> circuit.
> 
> You know you can use both SMT and through hole if you need?
> My current project for work has around 100 SMT parts, and 7 through
> hole, some of which are for PCB interconnect.
> 
> At the end of the day, the choice is up to the designer.
> I'm really comfortable working with 0402 and QFN (3mm x 3mm) packages,
> and with modding them with mod wires if needed (for the record super
> gluing a mod wire makes it rock solid).
> I'm considering trying 0201 for some parts, just as a personal challenge
> :)
> 
> So it's up to each person.
> There's no "right or wrong" or "this way is better", it's just
> different.
> 
> Paula
> _______________________________________________
> Synth-diy mailing list
> Synth-diy at synth-diy.org
> http://synth-diy.org/mailman/listinfo/synth-diy
> 
> ---
> This email has been checked for viruses by AVG.
> http://www.avg.com
> _______________________________________________
> Synth-diy mailing list
> Synth-diy at synth-diy.org
> http://synth-diy.org/mailman/listinfo/synth-diy