I like to use 32.785 Khz watch crystals for timing things. The added benefit is low power, because of less transistions of the PIC oscillator and associated stuff. The crystals are quite accurate, and the PIC doesn't care how slow it goes. I can't imagine anything that has to happen at >1MHz in a dog feeder. --Lawrence ----- Original Message ----- From: "A.J. Tufgar" To: Sent: Wednesday, June 12, 2002 10:37 PM Subject: Re: [PIC]: Pet feeder done! > In such an application I wouldn't be to worried about timing accuracy. > Think is your dog going to notice if he is fed 1 minute earlier each > day? Think what would happen if you ate supper exactly one minute > earlier each day then the day before, you would never notice. (and this > is extremely low accuracy for a pic you should be able to get <1 sec no > trouble). > > Now if it's commercial idea I'd make it accurate to less then a sec or > so, if it's for yourself, I guess that's for you to decide (depends on > your personal degree of perfectionism :) > > Just my two cents. > Hope it helps, > Aaron > > -- > http://www.piclist.com hint: The list server can filter out subtopics > (like ads or off topics) for you. See http://www.piclist.com/#topics > > -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details.