Le 06/06/2014 19:58, Lorenzo Marcantonio a écrit : > On Fri, Jun 06, 2014 at 07:50:50PM +0200, jp charras wrote: >> I am pretty sure this is a very old legacy code. >> It is now allowed. > > If it's allowed then no issue at all. It made me curious since the layer > setup dialog doesn't allow it (and once I tried to do a one layer board > and I searched for it). > > Actually it's very new code. PCBNEW_CONTROL::LayerPrev, for the new GAL > interface. Maybe he's simply been cautious. > >> Were is this code? >> Until now I never see a board which have *really* only one side >> (however, could be a very interesting board, if exists). > > There are a lot of THT boards that could be done on only one layer :D >
No. In this case you are talking about one *routing* layer, not a board layer. A board has always 2 * n layers ( You know that). And has at least always 2 sides, therefore 2 layers (like a rope has always 2 ends). THT boards (and not only THT boards) that could be done on only one *routing* layer, but this layer could be the back layer or the front layer. Many time, Guys who make micro-wave boards use only the front layer, and the back layer is a ground plane (not routed, but needed by micro-wave requirements). Other guys often use the back layer to route only one layer. This is a matter of routing constraint, not a matter of layer count. Do not become confused by a layer count and a layer routing constraint. Only one routing layer does not mean one layer, and obviously not only on side. -- Jean-Pierre CHARRAS _______________________________________________ Mailing list: https://launchpad.net/~kicad-developers Post to : [email protected] Unsubscribe : https://launchpad.net/~kicad-developers More help : https://help.launchpad.net/ListHelp
