>-----Original Message-----
>From: piclist-bounces@mit.edu [mailto:piclist-bounces@mit.edu] 
>Sent: 12 April 2006 17:55
>To: Microcontroller discussion list - Public.
>Subject: Re[2]: [EE] Mosfet driver
>
>
>
>Hi guys
>Thank you all for helping/answering me. I will try swaping the 
>source and drain and test again mosfet. My motor eats up about 
>12 Amps at normal load and almost 80 Amps when starting or 
>holding the rotor. This is why i tried to use this IRF but as 
>you guys told me maybe i will have to use a logic level mosfet 
>for this. Do you have any suggestions ? I can give you my list 
>with what i have : http://electronica.asm.ro/ This is my whole 
>library of components (what i own at home). Down there are the mosfets.

If you have no logic level MOSFETs handy, you could add a simple NPN bipolar transistor to drive the MOSFET's gate from the motor supply.  However, be carefull not to exceed the maximum allowable voltage on the gate (Vgs(max)).  If the motor supply voltage is higher than this then use e.g. a zener to clamp it.

Regards

Mike

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