[sdiy] lessons learned from temperature chamber design II

[Ingo Debus]

Czech Martin wrote:
> -the thermo chamber behaviour is of course unknown,
>  until you start playing with it. So some components
>  of the circuit (gain, integrator, differentiator)
>  will need adjustment in servall orders of magnitude,
>  i.e. you have to replace caps and resistors.
>  This will damage the circuit board. Therefore matching
>  or unknown value resistors are now soldered on pins
>  a few mm above the board (solder nails (sp?)). I can
>  exchange them whenever I like.

When I'm uncertain about resistor or capacitor values I like to solder 
in parts of IC sockets. Then it's plug and play.


> -the 12V regulator (for the fans) was thrown
>  out, since it will dissipate much heat and thus
>  influence the circuit

The regulator *dissipates* heat? Hey, you've invented a perpetuum 
mobile! ;-)

Ingo