HowTo: Drag Soldering Demo
Why Electrical Engineering Stack Exchange recommends it
Electronics Stack Exchange answerers link it when explaining drag soldering as the easy way to hand-solder fine-pitch SMD parts like TQFP and TSSOP.
Recommended by 2 people across 2 different months, 2014 to 2016.
What it is
A short 2010 demo from the CuriousInventor channel showing how to drag solder a 0.5mm pitch surface-mount chip. It uses flux and a larger chisel-style iron tip to run a bead of solder across the pins in one pass.
What people said
Recommends Houen · 2014-09 · Electrical Engineering Stack Exchange · on “How to go from newbie to manufactured?”
I am a newbie myself, so take this with grains of salt, but I have researched this a lot over the last month, and so I hope to bring a good newbie-needs perspective to it. Here's what I've found out: NOTE: I am using a couple of acronyms (PCB, SMD, etc.). I have not written what these mean on purpose, since you will definitely also need to know these concepts intimately. You need to go from prototype (Arduino?) to PCB version. First of all, see these two videos by EEVBlog: Video 1 [LINK] , Video 2 [LINK] Going from prototype to PCB version means switching from through-hole components to SMT components, and from a full-fledged Arduino to a barebones chip solution. The good news is that you ca
Recommends user39382 · 2016-10 · Electrical Engineering Stack Exchange · on “Best way to hand-solder this TQFP (SMD) component”
Learn to use "drag soldering" technique. Basically, instead of trying to solder each pin individually, you just get a bead of solder on the tip and roll it across the pins. As you hit each one, it'll leave just enough solder on the pin to attach it. A video will do a lot to help explain here: [this video] There's a few things that help make this work: Apply flux - lots of it - before you start soldering. Yes, I know the solder you're using probably has a flux core, but that's not enough here. (If you use paste flux, the paste can also help keep the part in place.) Using the right kind of tip helps a lot. A small tip is not what you want here! I use a Hakko "hoof" tip (T18-C2); there's probably eq
Cites Some Hardware Guy · 2014-12 · Electrical Engineering Stack Exchange · on “What's the easiest way to solder TSSOP parts?”
I use a modified drag solder, a technician taught me a million years ago. With that you can solder down even huge TQFP parts in just a few minutes. You don't even need a fine tip iron if you don't have one. I went with this technique because at the time I was just learning and solder bridges were very frustrating so I decided to "embrace the bridge" and make it part of my process. Oh and the cool thing is you can do this even with a crummy soldering iron. I like to have a pick, some solder braid, and a little flux on hand if necessary. You can use what's called a hoof tip if you have one but now I just use whatever tip I have. Pick Solder braid (buy the kind with flux in it already) Flux pen