Sat Feb 26 23:04:19 EST 2011
Valt reuze mee!
It's not such a big deal. Up to now my shaky hands have only
attempted DIP soldering. However, for a contract job I was not able
to find DIP components for prototyping, so I had to get over my SMD
1. Dead-bug + AWG30 kynar wire wriap wire.
Because I had no boards at all, this is what I tried first. The
soldering by itself wasn't so hard: just make sure there is a bit
of solder on the iron and touch the wire and pin. Getting the wire
and pin to sit still is another matter. A 2-arm helping hand is
what works well here.
2. SOIC -> DIP adapter.
I followed the advice from many tutorials online: put a good amount
of flux on the pads (I use a nail polish bottle & brush) and place
the component on the pads. The flux will make it stick a bit, but
you can still move it around. Solder one pin on one corner. I had
to press the chip down to make sure it didn't slide, as my shaky
fingers would push it out of place when I hit the side. If it
doesn't move any more, solder the opposite corner. Be very careful
not to bump the chip causing misalignment. Once two corners are
fixed, just add some flux on the pins, put some solder on the tip
(I'm using a slanted flat tip) and heat the pins one by one,
boiling the flux.
I don't think I'll be using the dead-bug style again. While
straightforward, it is a lot of work stripping & aligning wires, and
the result is fragile. Small adaptor boards are cheap on ebay.