Vasile Surducan wrote: > > On Wed, 21 Feb 2001, Tony Nixon wrote: > > > You will find that the clock will drift one way or the other depending > > on temperature, so using the mains as a frequency source is much more > > accurate. > > You are certainly joking ! Or in your country mains frequency drift is > under 0.5% ... > > Vasile > Perhaps a bit of AC math about power consumption in a system as large as a state grid may reveal why power companies try to keep the frequency as stable as possible. I'm definitely no expert here, but I'll bet it is definitely in the power company's best interest. Upteen million clocks around the world wouldn't be using the principle if it was unreliable. -- Best regards Tony mICro's http://www.picnpoke.com mailto:sales@picnpoke.com -- 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