Stefan,
I sent you directly an article out of Circuit Cellar on a reflow oven FYI. Didn't want to get into the copyright issues by posting to the group.
Regards
John C
> -----Original Message-----
> From: Stefan Trethan [mailto:stefan_trethan@...]
> Sent: 17 August 2006 08:53
> To: Homebrew_PCBs@yahoogroups.com
> Subject: Re: RE : [Homebrew_PCBs] SMD/curing oven
>
>
> 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
>
>
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