Your phone also gets time updates from a remote server, though it may not look as fancy hanging on your wall.
Nah. My phone is needed as an alarm clock.
I've got an HP Touchpad sitting around from their sell-out frenzy awhile ago...
A passive LCD clock uses a
lot less power though.
:hmm:
I'd need to flip the thing over to Android, and I bet there are some apps out there that'd serve me up with a nice clock.
Yeah I'm sure it is a cost saving and really only applies to a very small area of the customer base. The next number after -21.9 is "--". And really at some point it is just "Fucking Cold" and you really can't tell much difference unless you plan on measuring life expectancy.
True.
I guess if it gets too cold, the temperature probe's output (likely just a thermistor) gets out of range of the chip that's monitoring it.
"I'll need to code in another section to handle the slope of the output below -22 degrees."
"...why bother though? It's fucking cold at that point, -22 is good enough. Finalize it and move on."
I'd build one out of a Raspberry Pi with one of
these. NTP has proven pretty reliable and accurate for me.
Oh I know how to build the things. (Not Raspberry Pi though, simpler than that: Basic microcontroller level.)
I figured it'd be easier to buy something.
My chip of choice for industrial or commercial applications where it's difficult to access the device to change the time, and where no signals or network are available, or where an external antenna could be easily damaged by weathering:
Maxim's DS3231.
It's quartz-based, but temperature-compensated. A conventional quartz crystal on its own
could drift as far as 10-11 minutes over a year, depending on temperature. That chip can do ±50 seconds by measuring its temperature and adjusting the crystal's rate accordingly. Pretty nifty little thing, but it's expensive.
WWVB receivers are much cheaper to make than a wifi solution.
Yeah, ages-old radio receiver technology.
And there aren't any tech support calls for "I can't get it on my wifi network. What does SSID mean? Can I watch Youtube on this clock if it's Interneted?"