Lance is basically right.  But IRF9530 is an enhanced P-channnel and
it  needs just ~ -2 to -4V VGS to turn on.  Aaron, your configuration
is correct.  How about the wiring? parts? motor?

Ling SM


Lance wrote:

>Im afraid Andy is a bit on the wrong side here...
The IRF 9530 is a P channel device as Aaron stated but it is not a
logic level device, so even though the connections are correct there
is insufficient drive voltage to 'enhance' the channel(turn it fully
on).
Most non logic level mosfets turn on fully around 11 volts. So a
P channel mosfet will turn on fully when the gate is 11 volts LOWER
than the source. So +5V source will need a -6 volt gate drive, sad

Andy wrote:
> Not a complete one <G>
>
> You should have the FET between the motor and ground.  This is
called a
> "low-side" operation.

Aaron wrote:
> > It is all connected as follows:
> >  gate porta-0  source 5v  drain to motor Am i being a complete tit
?