https://www.rs-online.com/designspark/atomic-time-for-the-raspberry-pi
On 1/10/20 2:48 PM, ch...@wbmfg.com wrote:
WWVB is solidly supported by the guvmnt. No worries about that
signal. I thought it was 60 KHz. In any event you can pick it up
almost everywhere. You should not have to wait more than a half hour
for a clock to lock on. You might have a bad clock or something in
the environment making the signal a bit weaker.
I was doing a solar panel tracker a few years ago and was wanting to
use this signal to get RTC info. Turns out the only receiver chip
manufacturer had stopped making the chip. Reason was, an antenna,
capacitor and perhaps a transistor is all you need to feed the raw RF
directly into a MCU chip. It is pretty strong.
*From:* Ken Hohhof
*Sent:* Friday, January 10, 2020 3:13 PM
*To:* 'AnimalFarm Microwave Users Group'
*Subject:* [AFMUG] WWV
I am trying to get a cheap “atomic” clock to synchronize, not sure if
I have to wait until night time propagation or what, it is only
showing 1 signal bar.
But I did a couple Google searches, and was the federal government
actually planning about a year ago to defund WWV and take it off the
air? Seriously? And that didn’t happen, right, WWVB is still
transmitting?
I was a little surprised to realize there is just the one transmitter
site in Colorado, and that WWVB transmits on such a low frequency (50
kHz) and sends 1 bit per second of data.
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