[time-nuts] WWVB Signal Generator
time at patoka.org
Sat Aug 25 14:49:25 EDT 2018
Few moons ago, I was thinking about to connect little audio amp. with
attached usual WWVB ferrite antenna to the computer sound card. But I
was stack about how to modulate the signal using SoundCard libraries.
There is bunch of example how to generate sine or rectangles. The
question is how to make it works as WWVB
On 2018-08-25 14:28, Mark Sims wrote:
> If I was going to do it I would take a cheap Ublox 7M board (around
> $10 with antenna), program one of the time pulse outputs for 60 kHz
> (it divides evenly into 48 Mhz so no jitter), feed the Ublox serial
> data / 1PPS to an AVR chip (or $2 Arduino Nano clone), and use that
> to modulate the 60 KHz output. Total cost less than $20 and should
> get to to the microsecond level range.
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