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 > > >
