This is quite correct. Which way you drive them depends on the design. You can drive them either from the negative side (open drain) or from the positive side (open source) - which way will depend on your switching and driving requirements. -----Original Message----- From: pic microcontroller discussion list [mailto:PICLIST@MITVMA.MIT.EDU]On Behalf Of Jai Dhar Sent: Friday, 14 February 2003 4:14 am To: PICLIST@MITVMA.MIT.EDU Subject: Re: [EE]: MOSFET as a digital switch From what I understand from MY class (heh), you simply need the polarity correct for current flow. I don't think they are truly 'digital' devices (except with the logic level ones). But then again, this is my speculation - I'm not an expert on this stuff. Quoting Micro Eng : > All this talk of FET's is bringing back some fuzzy memories of it when in > class. Thats what happens when you just do digital design for years. > > These are bidirectional devices right? Such that it doesnt matter if the > load is attached to the drain or source? Or does it matter? > > > > > > > _________________________________________________________________ > MSN 8 with e-mail virus protection service: 2 months FREE* > http://join.msn.com/?page=features/virus > > -- > http://www.piclist.com hint: The PICList is archived three different > ways. See http://www.piclist.com/#archives for details. > ---------------------------------------- This mail sent through www.mywaterloo.ca -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details. -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details.