I lost track of the OP... sorry >> http://www.piclist.com/techref/clocks.htm >> >> http://www.dvanhorn.org/Micros/All/Crystals.php Very good and practical articles, thanks a lot. >> >> http://ww1.microchip.com/downloads/en/AppNotes/00949a.pdf >> Now this is a very methodic way of finding out the cap values, no marging for "this should work" method. I'm home making my PCBs, it's not gonna be a market product, so I wonder if I should go through something as detailed and complete as this, but just by reading the AN it gave me a much deeper insight of what's going on. >> http://ww1.microchip.com/downloads/en/AppNotes/00943A.pdf That's over my head, but it was good because it pointed two other ANs that are more basic. >> >> http://ww1.microchip.com/downloads/en/AppNotes/00849a.pdf >> >> http://ww1.microchip.com/downloads/en/AppNotes/00826a.pdf >> Errr.. that you just pointed here.. Sorry, I was reading sequentially >> http://ww1.microchip.com/downloads/en/AppNotes/00588b.pdf >> Very good one too, talks about most of the aspects of choosing crystal over ceramic over RC etc. -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist