txtempus | MSF clock LF-band signal transmitter

After building, you can install the binary in some standard location. Each set-up will be different. In my case, I need my DCF77 radio watch getting set over night. So I built this watch holder that presents the watch upright while the antenna (in the wristband) is close to the transmission coil that is lying flat on the Pi. The bottom of the 3D printed case is filled with lead shot in epoxy to provide a stable base. The Raspberry Pi Zero W runs ntpd, PLL locking the system time to various stratum 1 NTP servers keeping it at atomic time within ±50ms. This particular watch only checks the radio twice a day at 2am and 3am, so there is a cron-job that runs txtempus around these times for a few minutes. If you put the following line in your /etc/crontab txtempus will be started at 1:57 and 2:57 at night and runs for 10 minutes. (this requires that you have installed txtempus so that it can be found in /usr/bin : sudo make install). watch holder | …​ with watch -------------------------|------------------------------  |. tx common telecommunication abbreviation for 'transmit'<br/> tempus, n Latin. Time; period; age. [DCF77]: https://en.wikipedia.org/wiki/DCF77 [WWVB]: https://en.wikipedia.org/wiki/WWVB [JJY]: https://en.wikipedia.org/wiki/JJY [MSF]: https://en.wikipedia.org/wiki/Time_from_NPL_(MSF) [NTP]: https://en.wikipedia.org/wiki/Network_Time_Protocol [Raspberry Pi GPIO]: https://www.raspberrypi.org/documentation/usage/gpio/ [very wrong frequency]: https://github.com/hzeller/txtempus/issues/1.