Tim Hunkin has made a similar clock, see http://www.timhunkin.com/27_domestic_clocks.htm
The elephant clock down the bottom of the page indicates the moon's phase in a very innovative way. Mind you the night & day sectors are equal, so they are for the equator, not for the maker's lattitude of 50 deg :) Tom Harris <celephi...@gmail.com> On 21 January 2014 05:49, Jim Lux <jim...@earthlink.net> wrote: > So here's my next idea.. > > > Set up a 24 hour movement (no minute hand) so that you have the sun moving > around the dial: at the top at solar noon, with the rate being reasonably > constant around the dial(e.g. using the solar clock algorithms developed) > > Then, have two other pointers or sectored disks on the face to indicate > sunrise and sunset time. I haven't figured out the mechanical aspects, but > maybe a small motor driving the edge of a clear plastic disk. (or if there > were a good cheapish source for multi axis pointer systems). > > One could also add a moon pointer (and all the rest of the planets too). > Sort of a geocentric Orrery. The planets would need to be able run in > both directions to accommodate retrograde apparent motion. > > It would be easy with laser pointers or light beams and stepper motors > driving a tilted mirror to project moving dots on the wall, but a more > mechanical display would look nicer, I think. > > Once the mechanical aspect is figured out, the software should be fairly > straightforward to drive whatever motors there are. > > (After noticing Saturn this morning when I went to go get the paper before > dawn) > _______________________________________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to https://www.febo.com/cgi-bin/ > mailman/listinfo/time-nuts > and follow the instructions there. > _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.