Jim Palfreyman wrote: > Hi Folks, > > Well I have a nice idea in my head for a lunar occultation timer. Basically > it's a normal clock that accepts a push button click and records the UTC of > the events. Multiple events can be recorded and displayed back. The time > must be settable and could also accept an external 1 PPS for accurate time > setting. It also needs to be portable and battery powered. When it does get > 1 PPS time setting it could work out how good its oscillator is an adjust > for it. etc. etc. and etc. > > I have lots of other ideas in my head too and it's about time I settled down > and thoroughly learned a decent micro controller. I want to pick one, get > the stuff I need and commit to it. I've had experience with Atmel AT90S2313 > but really want something with more memory, a decent number of io pins and > I'd like to avoid assembler. > > It needs to drive a display of some form (standard LCD is fine but other > options would be good) and since nearly all my references are based on 10MHz > it would be nice if it could be clocked at that speed. I used to program the > Acorn Achimedes and so ARM would be nice and since I'm a 20 year experienced > C programmer (not C++) then that is what I'd like to program it in. > > Thoughts, ideas, comments would be appreciated! > > Oh and cheap! > > :-) > > Regards, > > Jim > Jim
Is this intended for field use? If so, one has to remember that it will not always be easy or practical to set up a GPS receiver on site. Provision for using the timer as an interpolation device to interpolate between timestamps obtained before and after the event from a fixed location reliable GPS receiver would greatly enhance its usefulness. Sometimes its hard enough to setup and acquire the star or other object of interest without having to worry about a GPS receiver as well. Bruce Bruce _______________________________________________ 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.