Raspberry Pi WWV Simulator
Recreates the WWV Shortwave audio broadcast time signal without requiring a radio or even Internet access. This syncronizes the Pi audio to a local Real-Time Clock (RTC) playing the correct time like WWV.
Hear it in action on YouTube
Actually, this is a project to help show you how to connect a tiny OLED screen, a Real Time Clock (RTC) and/or an Audio Amplifier all to a single Raspberry Pi Zero! All with the bonus of being able to listen to WWV time “signals” anytime you wish.
ACCURACY: The Pi's clock is set to the RTC so is as accurate as the RTC module. (Typically, +-1 second or so per day) For more accuracy, use a higher quality RTC module.
Note that the Pi will automatically recalibrate the RTC whenever it is connected to the Internet (ethernet or wifi)
Also Note: It can take up to two minutes before audio starts (for syncronization)
INSTRUCTIONS: RaspiWWV.pdf
Installs the reboot cron and startup file. (This assumes installed to /home/pi on Raspberry.)
Manually run WWV Simulator using:
$ sh runWWV.sh