On 8/10/16 8:03 PM, Chris Albertson wrote:
But for sure a GPS module, a handful of buttons, 7 7-seg LEDs (I’d display a 10
Hz digit), a little phototransistor dimming circuit and an ATMega… $99 retail?
Certainly doable.
Almost everyone one Earth already owns a GPS sync'd alarm clock. My
iPhone does all I need, pretty decent sync to UTC, big numbers I can
read without glasses and it makes noise when I need to get up. The
iPhone sells for way over $100. But any cheap $99 android tablet can
function as a digital clock. All You need is a stand. These phones
has pretty much obsoleted alarm clocks, cameras, Dedicated GPS
receivers for car navigation, and 100 other things
Except where you're in an environment that cannot tolerate devices with
radios or portable data storage; both of which a mobile phone provides.
That's where a conventional clock (alarm or otherwise) or timekeeper is
needed.
One can argue, of course, that one does not need "time-nuts" level alarm
clock accuracy in such an environment, and if you did:
a) you would go through the hoops to bring a GPS receiver and associated
computing devices/electronics in
b) you'd probably just buy an off the shelf box - you'd have the budget
AND the hoops would be easier to jump than with something homegrown.
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