On 21/05/2015 20:43, wrote:

I take it this is a classified project,

Not sure why you think that .... this is a home build project to control
the speed of a computer fan ... thus allow cooling of a comms cupboard
that gets too hot in summer.

The circuit is based on the cct he
https://www.dropbox.com/s/rewcotpvkd...rcuit.jpg?dl=0

They use a bare board ... for safety & longevity building this into al
aluminium case. That is why question of where to mount thermistor comes
from.