On Thursday, 21 May 2015 16:05:37 UTC+1, rick wrote:
Have knocked up a fan speed controller ... where temp control speed ...
and hence cooling.

The temp sensor is a Thermistor - the cct board is inside a metal case,
I'm thinking that it might not be responsive enough if the thermistor is
inside the case.........

I could arrange to glue it to inside of case lid, or even onto outside
of case lid ........ anybody done any thermistor based projects ... just
wondered what is normal.

I take it this is a classified project, since you give us almost no detail. For quick response a thermistor needs to go where you're measuring. For a glacially slow response it can go elsewhere when the temp there follows the temp to be measured.


NT