What do you mean by "make such a chip"? If it is a PIC then it is only a PIC programming matter or programming a CPLD. To make chips you have to go to a foundry.
On Fri, Mar 2, 2012 at 5:13 AM, Neville Michie <[email protected]> wrote: > I have a problem with two pendulum clocks that interfere with each other, > even though they are bolted to a brick wall on bedrock foundations. > A solution to this problem is to run one on mean time the other on > sidereal time. Then I can analyse the operation of each of them. > Now there is a problem with sidereal time that neither the GPS system or > WWV transmit reference signals for sidereal time and the > method of converting mean time to sidereal by calculation is difficult for > clock synchronisation. > A possible solution is to take mean time (from a TBolt 10MHz) and divide > it by 9,972,695.7 to give a PPS(sid) signal that can run a digital clock > dial > and give one second(sid) ticks to phase the pendulum. It may be simpler to > divide by 9,972,696 to stay with integer division and have an error in the > order of a second per annum. (which we have from leap seconds anyway). > TVB made some picDIV chips with a synch pin that do a similar task, but > have I got the number correct? and are there other nuts that would > like to add a sidereal clock to their clock vaults to make it worth while > to make such a chip? > If I set up the sidereal clock then I can use my theodolite to check time > against the stars. > cheers, > Neville Michie > Sydney > Australia > > ______________________________**_________________ > time-nuts mailing list -- [email protected] > To unsubscribe, go to https://www.febo.com/cgi-bin/** > mailman/listinfo/time-nuts<https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts> > and follow the instructions there. > _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
