Dumitre,

IRF540 it's an N channel mosfet...
So, driving voltage it's Vgs.
You have the load in the source instead of drain.
Move it between drain to +Vcc and connect source to ground.
And read datasheet carafully  before connecting everything.

Vasile

On 4/12/06, Dumitru Stama <list@mirosat.com> wrote:
>
> Hello guys
> I have a strange problem when trying to use the attached circuit as a
> small forward-only driver for a DC motor. The Mosfet is an IRF 540 and
> the PIC is 18F452. The pin RC2 in set as output from TRISC and i made
> a small program in C18 to issue a "zero-logic" for one second and then
> "one-logic" (+5v) for another second and so on.
> My problem is that the motor starts turning when the 1 is issued on
> RC2 but instead of stopping when i issue 0 it just turns a bit
> slowly... After 1 second the 1 is sent again on RC2 and the motor
> turns again fast.
> Can you guys help me with a suggestion ? What should i do ?
>
> Dumitru Stama
>
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