On Sunday 09 March 2003 11:42 am, Jai Dhar wrote:
> Sorry to resurrect this thread, but I finally got a hold of some
> IRLZ24's, and decided to try out a little electronic switch with a
> fan. I basically have the output of a FF connected to the gate of
> the mosfet through a resistor, which then has a fan going across
> it. When the fF output is on, the gate see's +5V, which is well
> above the threshold, but the source only gets about +3V. I tried
> removing the FF and just applying +5V directly to the gate, and
> same results. But when I apply +12V to the gate, the fan turns on
> fully and source gets +12V. Am I doing something wrong? (I have
> attached schematic)

Yes, you've connected the fan to the wrong place.

The fan should go between +12 and the drain of the transistor; the
source should go to ground.

--
Ned Konz
http://bike-nomad.com
GPG key ID: BEEA7EFE

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