On Wed, Aug 19, 2009 at 2:13 AM, Tony Vandiver w= rote: > RTC =3D real time clock - meant to keep up with the actual time and date, > and it's usually battery backed so that you don't have to set the > time/date every time you power up for normal processing. =A0Are you > wanting clock functions for your project so users don't need a watch, or > are you going to time/date stamp some recorded data - neither is a bad > idea, and adding would be a good experience, it's just typically outside > the scope of a speedometer/trip meter. That is correct. I have several (SMT) I2C RTC chips with TCXOs. Perfect addons for this project. Easy to use and interface. -- = http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist