Couldn’t find your earlier link to
“Cash’s video”. Could you re-post.
Looks fine. Mine is from Michael's rated at 360w. It
was $20. WalMart might even be cheaper. They're probably all
nearly identical. Mine looks like the one you show except
for packaging details. BTW, it's super for heat shrink
You control the heat with the distance from the piece.
I start out about a foot away to get the board warmed up to
a point where I don't want to touch it, Keep the end moving.
Watch Cash's video that I link to earlier. It's really that
Don't get too close to the part while the solder paste
is still grey. There's a point where the solder paste starts
getting a little glossy and slick. You can blow the part
right off the pads if you get too aggressive. For that
matter, I often tape smaller PCBs down as they can scoot
around from the air flow too. Then it's magic. The solder
turns silver, the part aligns itself right on the pads
better than you did, and it's a thing of beauty.
On very tiny parts, say ones with 0.5 pitch pins, you
can get solder bridges. Don't worry about them. A light
touch with solder wick and a soldering iron and they
disappear leaving the part perfectly soldered in place. On
many tiny parts with lots of legs, I just lay down a running
blob of solder that shorts all the pins together, then wick
up the excess. I did about a dozen AD9850s that way. All
I understand some guys have tremors and other things
that would make SMT difficult. It takes a steady hand to
place the parts but not nerves of steel. I suspect anyone
who can walk from the kitchen to their workbench with a full
cup of coffee without spilling any could manage the larger
SMTs without difficulty.
SMTs open up a whole new world of kit building and
homebrew possibilities. They aren't limiting our abilities
at all. We're doing that to ourselves.
On 2/20/2018 9:21 PM, VE7WQ wrote:
Thank you Eric,
What do you think about this heat gun on eBay?
110V 300W Hot Air Gun Hand Hold Mini Heat Gun for Embossing
Heat Tool $10.76
Or should I buy a $20 embossing tool (heat gun) from WalMart
or any craft store ?
Tuesday, February 20, 2018, among
other things you wrote:
EK> A syringe, a small tweezer to
place the parts, solder paste and a $20
EK> embossing tool (heat gun) from
WalMart or any craft store. It makes the
EK> 20-QFN or any other SMT easy.