[sdiy] Desoldering techniques for chips that you want to keep?

[rude66]

2 ways i've used to get stuff off of circuit boards:

the messy way: hold the board solder down over a gas stove until the solder
starts to melt. them smash board hard on the counter.. voila, almost all
parts will come flying out, including ic's resistors, etc.
disadvantage: it stinks because a lot of times the board also starts to
melt. and the solder can get onto the counter, so it's messy.

the better way: use a small gas burner and do it outside.. i have a small
thing, it's like a portable soldering gun running on gas, it's fairly easy
to get it to run the flame over all the soldered pins and get the solder to
flow on all pint, then flip board over and tap on something. 99% of the time
the ic comes out.

r./

On 1/30/06, Seb Francis <seb at burnit.co.uk> wrote:
>
> It's pretty hard.  If you want to be sure not to damage the PCB then you
> are better off sacrificing the IC - cut the pins and desolder
> individually.
>
> But you can get special soldering iron bit that will desolder up to a
> 16pin DIP IC all in 1 go (it sits on all pins at once).  This is the
> best way I can think of.  Maybe with a single sided board you'd be able
> to manage by removing the solder with a solder sucker or desoldering
> braid, but with double sided PTH boards it'll be near enough impossible
> to do this.
>
> Seb
>
>
> steve jones wrote:
>
> >Newbie stuff.... I've always used chip sockets for my DIY projects so
> >far, so this is new to me...
> >I'm looking for info on how to desolder and remove chips from a
> >circuit board without damaging either. Should I use a solder sucker or
> >copper braid? Flux? Soldering iron size / power? Should I add new
> >solder to start with? How tough are chips anyway?
> >General advice most welcome.
> >Steve
> >
> >
> >
> >
> >
> >
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://synth-diy.org/pipermail/synth-diy/attachments/20060130/1b557b0c/attachment.htm>