Tiny ovens

[Steve Jones]

On Apr 29,  9:15am, David Halliday (Volt Computer) wrote:
 Subject: RE: Tiny ovens

> Been done before!  <grin>

Well yes, I know it's been done.  I just wondered if my
strange implementation had any hope of working.

Again:

> Is the following feasible/reasonable?
>
> I'm tentatively planning my VCO.  I'm thinking of using
> a transistor array; one of those including a diff pair.
> I'm considering epoxying an inverted (physically) power
> transistor and a thermistor to it's top.  The thermistor
> would be part of a voltage divider feeding a comparator
> (w/ hysteresis).  This comparator would then be used to
> drive the heater-transistor.  The threshold would be set
> to a level just hotter than the hottest normal running
> temperature of the array.
>
> Is the epoxy heat conductive enough?  Am I oversimplifying
> this or should this work?

stevej