Homebrew PCBs

--- In Homebrew_PCBs@yahoogroups.com, "Stefan Trethan" 
<stefan_trethan@...> wrote:

> 
> But now comes the nasty part - writing some atmel C software that 
allows  
> me to run either a constant temperature or a timed profile. I really 
wish  
> i wouldn't have to do that..
> Nobody out there with the desire to make such an oven as well? I 
would  
> provide PCB artwork for a universal controller board in exchange for 
 
> software ;-).
> 
> ST
>

A PIC is a elegant solution, but this kind of controller can be made 
with an opamp, a comparator and a variable reference. For a timed 
profile you need only some logic ICs. 
Of course, the board will be a little bit larger...
If you want a computer controlled oven, I found somewere a little 
parallel port relay controller:
http://www.kemo-electronic.de/en/module/m125/index.htm
Everytime there is an analog solution as a "plan B" ;-)




Adrian