Homebrew PCBs

Yipes- seems like a lot of work.

I've been working with QFP (Atmega2580, AD9951) and 0603, 0805, 1206- hand
soldering is no problem using 0.015" solder and standard iron- but then
again with over 900 parts on one board, the oven approach is not practical
for one-offs. I wonder why so many are doing solder-paste screens, etc for
small lots. Faster to hand solder them IMO. Of course, if you want to spend
the time making it more complicated than it need be...

Use a Loctite mini-fluxer and regular solder and regular solder. If you want
to see how to solder a QFP I have some photos here:

http://picasaweb.google.com/worldradiolabs/PicastarComboBBDSPCodecDDSSections#


Best regards,

Bill
On Thu, Mar 11, 2010 at 3:23 PM, Philip Pemberton <ygroups@...>wrote:

>
>
> Anyone looking for a cheap SMD reflow soldering oven?
>
> http://www.argos.co.uk/static/Product/partNumber/4230302.htm
>
> Get one of these, a solid-state relay, thermocouple and a PID controller
> and you're basically sorted. Or you can do it the same way Kenneth Maxon
> (ref: Seattle Robotics "Encoder" magazine) did and just use the dial on
> the oven.
>
> Or even build your own temperature controller out of a PIC micro and a
> Maxim MAX6675 thermocouple interface chip...
>
> Temperature goes up to ~350C in a minute or so with no trouble (despite
> the thermostat being set to 250C) and cools down to 50C almost as
> quickly when you kill the power to the heating elements. Also warms the
> room up quite nicely (it could probably do with a bit of insulation
> around the oven).
>
> Of course, I bought mine when they were �60, now they're only �30...
> such is life.
>
> --
> Phil.
> ygroups@... <ygroups%40philpem.me.uk>
> http://www.philpem.me.uk/
>  
>


[Non-text portions of this message have been removed]