Homebrew PCBs

On Wed, 16 Aug 2006 22:56:17 +0200, adicont2 <adicont2@...> wrote:

>
> 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


well, actually the analog solution is always plan A for me.
I just thought it will get too complicated with a soldering profile, but  
thinking about it that's not necessarily the case..
I will have to think about that - it would definitely be very tempting to  
throw something together in a matter of hours where it would take me years  
with an atmel ;-)
This could be done with a very simple state machine - 5 states: ramp up,  
soak, reflow, dwell, cool. That can probably be simplyfied into 3 states  
which are simple changes of temperature setpoint for a certain time..

Hmmm... you definitely got me thinking there...

ST