That is certainly true and well-worth doing, but you should still make sure the copper plane is at ground potential at non-zero frequencies or you will end up with a large antenna attached to your circuit.
Regards, Robert. Andy Eskelson wrote: > Another use for zones is to reduce the amount of copper that you need to > etch away. > > Andy > > > > On Sat, 04 Jul 2009 09:56:12 +0100 > Robert <[email protected]> wrote: > >> Zones are used to create power planes (also known as ground planes, >> though strictly speaking that refers specifically to a conductive plane >> at ground potential). If designed correctly they will reduce >> electromagnetic emissions from your board and reduce its susceptibility >> to electromagnetic fields. Typically on a two layer board you have one >> plane for ground on one side, and one on the other side for V+ (as that >> makes the most efficient use of the available area), but of course you >> may have more than one supply voltage (possibly both positive and >> negative), in which case having multiple supply voltage zones may be >> helpful. Note that the supply voltage planes *do* need to be >> electrically connected to the ground plane at all non-zero frequencies >> in order to be useful (typically that is achieved with the liberal >> application of decoupling capacitors). >> >> Multi-layer boards allow you to reduce the size of the holes in your >> power planes (which is a good thing), but I'm guessing you will be >> creating two layer boards. >> >> Before designing your board I do recommend that you do a bit of research >> first to learn what makes a good power plane and what will give the >> board more EMC problems than having no planes at all. Fortunately it's >> not hard stuff to learn (unless you want to go into the theory). >> >> Regards, >> >> Robert >> >> [email protected] wrote: >>> Ive read the help Docs in PCBnew on zones,but i still don't get >>> what they are used for. >>> Are they just for placing v+ and gnd ? >>> Couldn't I just place vias or pins for v+ and gnd? >>> Should i just make 2 polygons, one for v+ and one for gnd? >>> >>> >>> >>> >>> >>> ------------------------------------ >>> >>> Please read the Kicad FAQ in the group files section before posting your >>> question. >>> Please post your bug reports here. They will be picked up by the creator of >>> Kicad. >>> Please visit http://www.kicadlib.org for details of how to contribute your >>> symbols/modules to the kicad library. >>> For building Kicad from source and other development questions visit the >>> kicad-devel group at http://groups.yahoo.com/group/kicad-develYahoo! Groups >>> Links >>> >>> >>> >>> >>> ------------------------------------------------------------------------ >>> >>> >>> No virus found in this incoming message. >>> Checked by AVG - www.avg.com >>> Version: 8.5.375 / Virus Database: 270.13.3/2216 - Release Date: 07/03/09 >>> 05:53:00 >>> >> ------------------------------------ >> >> Please read the Kicad FAQ in the group files section before posting your >> question. >> Please post your bug reports here. They will be picked up by the creator of >> Kicad. >> Please visit http://www.kicadlib.org for details of how to contribute your >> symbols/modules to the kicad library. >> For building Kicad from source and other development questions visit the >> kicad-devel group at http://groups.yahoo.com/group/kicad-develYahoo! Groups >> Links >> >> >> > > > ------------------------------------ > > Please read the Kicad FAQ in the group files section before posting your > question. > Please post your bug reports here. They will be picked up by the creator of > Kicad. > Please visit http://www.kicadlib.org for details of how to contribute your > symbols/modules to the kicad library. > For building Kicad from source and other development questions visit the > kicad-devel group at http://groups.yahoo.com/group/kicad-develYahoo! Groups > Links > > > > > ------------------------------------------------------------------------ > > > No virus found in this incoming message. > Checked by AVG - www.avg.com > Version: 8.5.375 / Virus Database: 270.13.3/2217 - Release Date: 07/03/09 > 18:11:00 >
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