Homebrew PCBs

>    Posted by: "Stefan Trethan" stefan_trethan@... stefan_trethan
 >   Date: Wed Aug 16, 2006 10:49 am (PDT)


>But now comes the nasty part - writing some atmel C software that 
>allows....

Stefan,

    Have you looked at the recent Elektor SMD oven article?  It has 
some clever temperature calibration routines. (and uses an Atmel 
processor which Elektor has for sale programmed)

    I bought an 800W oven for ?19 which gets to soldering temp in 5 to 
6 mins without extra insulation.  I also contemplated grafting a 
second pair of elephants  to increase the temp profile but don't think 
it will be necessary.  I'll definitely add insulation however.

    The control side of the oven is also rather small to fit a single 
PCB (the Elektor PCB is huge ;-) so I used Eagle to generate a new PCB 
in three parts ( input, power and CPU) which will allow it all to fit. 
I've sourced all the components but haven't built the controller yet. 
If you're interested, I can send you the files.  You can download the 
code from the Elektor website free.

    Philip.