Homebrew PCBs

Thanks Stefan,
I will try to get it running, have to find suitable motor.
Bengt

--- In Homebrew_PCBs@yahoogroups.com, "Stefan Trethan" 
<stefan_trethan@g...> wrote:
> 
> On Wed, 13 Oct 2004 20:51:10 -0000, Bengt <tecnoconsult@t...> wrote:
> 
> >
> >
> >> Hi Stefan,
> >> In my Photo album I have one picture, is this a thermo *device* 
that
> >> can be used for the schematics you will provide?
> >
> > The resistance is about 250Kohm in room temperature, decreases 
when
> > warming up.
> >
> > Bengt
> >
> >
> 
> looks quite right, you will want to use a fairly large value for 
the pot  
> to start
> with, say 500k or more. you can measure the resistance at 160C if 
you want  
> to know if
> a lower value would be better (if it is too big it is hard to 
adjust  
> precise but if it is too
> small the temperature will be too high).
> 
> have a look at that schematic and then we can discuss everything i 
left  
> out.
> 
> ST