Instructables
We all know how to use a Desoldering Iron, Brade, or Pump to desolder components one lead at a time. Not only is this slow and tedious, but its not much fun either. Now a heat gun makes things a little more interesting but is better suited for Surface Mounted Technology (SMT). I wanted to take things up a notch and show you how to take Desoldering to the extreme. 

Tools Needed:
  • Butane/ Propane torch ( the bigger the better)
  • Eye protection (face sheild preferred)
  • Leather Gloves
  • Metal box
  • Pair of pliers
  • couple of large cookie sheets
  • Board to desolder
This method is for gathering of bulk components off of old circuit boards. It is meant to be fast and fun. You may or may not get any usable components this way. But if all goes well its a quick way to gain allot of simple components like resistors and capacitors from a board. 
 
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Step 1: Safety First

Picture of Safety First
!!WARNING!!
 
Before we get started we need to cover some important safety concerns.
 
First of all this Instructable involves the use of an open flame. As such any and all safety precautions should be taken.

1.       Work in an open and well-ventilated area!
2.       Make sure any flammable objects are cleared from the work area!
3.       Wear appropriate protection such as safety glasses, face shield and gloves! Also wear long sleeves and pants.

It is very important you work in an well-ventilated area. You will be applying allot of heat to a circuit board and harmful vapors could be released. Because we are using an open flame it’s a good idea to keep all flammable items clear and a fire extinguisher handy. Wearing long sleeves, pants and eye protection is essential. The solder can get a gas bubble in it and pop, spraying molten solder everywhere.
As always have a fire extinguisher handy. If you’re not careful you could overheat a component causing a fire. Since this will be the equivalent of an electrical fire you will want a Class C extinguisher on hand.
 
Important Note:

You perform the steps in this Instructable at your own risk and assume all responsibilities for your actions. I am not responsible for any damage or harm you cause while attempting to perform the tasks outlined here. I can almost guarantee you will get burned doing this. So you have been warned. 
sgriffith626 months ago
This method isnt new. I was doing this 40 years ago. I would wear goggles, and a respirator as verg toxic gas will be generated. safer to use a heat gun
mpilchfamily (author)  sgriffith626 months ago

No one said this was anything new. I just threw this together for the Extreme Contest they ran 2 years ago.

kool1zero2 years ago
It isnt considered an electrical fire unless it was caused by electricity. the main point of the special type of extinguisher is that the solution it sprays is non-conductive. a plain fire extinguisher should work assuming it isnt hooked up to power
mpilchfamily (author)  kool1zero2 years ago
And i thought it was more to do with what was burning, i.e, metal.

Thanks for the info!
http://en.wikipedia.org/wiki/Fire_classes
Electrically are called class C. ABC fire extinguishers are some of the most common. There is a class for metallic fires (magnesium, etc...) K is a little special, its basically a grease fire. The link explains about the main concern with C fires is potentially energized outlets or equipment.

But that doesn't change the fact that if you're burning a circuitboard you're releasing noxious chemicals so you should definately wear eye protection and be well ventillated
Earthscum2 years ago
The sensible kid in me says to stay away, but the destructive kid in me thinks he may have a couple PCB's that deserve to be burned at the stake...
dafonso2 years ago
I was just discussing this method of mass-desoldering last night with a friend. I tend to use a heat gun (because I have one), but nothing says "melt" quite like a blue-hot flame. Kudos.
mr.frob2 years ago
What if you were to coat an area with flux paste first? Maybe I'll try it this weekend.
mpilchfamily (author)  mr.frob2 years ago
That would make it even more extreme! FTW!

In which case i'd wear a mask of some sort. Probably should have worn one when i was making the video. Oh well whats a couple year off your life anyway. ;)
nspirit2 years ago
Dangerous method for components. Better use an hot air gun.
But still extreme :)