need suggestions - GPS clock

haklesup · Post by **haklesup** » Wed Apr 09, 2014 2:50 pm

in that case search digikey, mouser and the web for "GPS OEM Modules" you will find a lot and many only need minimal external components to operate and the first one I looked at was $20 and has a timing pulse output. Not sure if it suits your requirements but these modules are actually quite inexpensive since they lack the battery, display and software IP that are part of a consumer receiver.

dacflyer · Post by **dacflyer** » Thu Apr 10, 2014 10:39 am

i am thinking to get one that has a back up memory battery with it...

haklesup · Post by **haklesup** » Thu Apr 10, 2014 5:17 pm

If all you want is a time code or pulse, I don't know what memory there would be to back up. Many of the modules have some flash memory for system settings. The only purpose I can think of would be to reduce startup time if you turned it off and I'm not even sure that is applicable in your stated app.

Dean Huster · Post by **Dean Huster** » Thu Apr 10, 2014 8:10 pm

Again, for me, it's frequency. A pulse is fine for setting the time (although there will still be propagation delay issues), but I need a standard phase-locked frequency out, such as 1MHz, 5MHz, 10MHz, the higher the better. Even something more weird that can be divided or multiplied into a decent value would be ok. Guess I'll have to start searching myself.

dacflyer · Post by **dacflyer** » Fri Apr 11, 2014 3:05 pm

the battery back up will help to retain sat info in case of a brief power outage,,the gps will be able to relock onto them faster, than a old restart..

Dean Huster · Post by **Dean Huster** » Thu Apr 17, 2014 3:37 pm

Yeah, I hate those old restarts!

dacflyer · Post by **dacflyer** » Sat Jul 26, 2014 6:39 am

UPDATE - well i been working hard getting things together here on my GPS Clock
i have all the digits mounted and i have a driver board and on the driver board is the ATmega328P (same IC/CPU that is on the Arduino Uno)
CPU that will run everything.
the ATmega328 is driving 6 TPIC6B595's ( display drivers ) the GPS will also connect to the ATmega328P. i have friend right now that is helping me with the programming to make it all work.
in exchange for his time i am trading him a set of power chair motors that he wants for another project. i think it is a fair trade

so far we have made a test program to make sure that everything is working with each other.
so good so far.
i'll post more updates later on..

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