KPL
Is this a one off ?  Or are you doing many ?
Did you test the /FAULT output by stalling the fan ?
I am grabbing a sample now to take a look at it.
Gus
>=20
> Hi, distributed brains.
>=20
> Has anybody used microchip's TC652 fan controller? That seemed like a
> very simple/safe way to slow down fans of my PC, but somehow I can not
> get it to work as intended. Circuit is just like the one described in
> TC652 demo board users guide.
> Fan is running, but fan fault detection does not work at all, and
> temperature control seems very erratic.
> Circuit is very sensitive to my hand nearby it, even without touching it.
> 5V power comes from a cheap wall wart, which was good enough for all
> kinds of PIC circuits before. 12V for a fan comes from another wall
> wart.
> There is a big cap across the 5V power.
>=20
> Unfortunately I have no scope available now.
>=20
> Any ideas?
>=20
> --
> KPL
--=20
http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive
View/change your membership options at
http://mailman.mit.edu/mailman/listinfo/piclist
.