Many thanks Bob! Tomorrow i will try!
Best regards
       Nicola


Bob Blick wrote:
> Here's a circuit that will run a hard disk motor. Shown is a 3 wire
> motor. If you use a 4 wire motor just leave one leg unconnected(connect
> the center of the star to the 220uF caps).
>
> Inverters are sections of a CD4049. Transistors are one each jellybean
> NPN and PNP, I used PN2222A and PN2907A.
>
> Supply voltage to suit your motor, I used 12 volts.
>
> Circuit is NOT SELF STARTING. With pot at greatest resistance, spin the
> motor by hand to start. Then advance the pot to desired speed.
>
> Cheerful regards,
>
> Bob
>   
>
> ------------------------------------------------------------------------
>
>
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