gps Beaglebone Cape for NS-T, revision 2 I'm testing the second revision of this cape now. Schematic is on github [https://github.com/ddrown/NS-T-BBB-Cape] (left: rev1, right: rev2) It's working much better than rev1, but time will tell if
gps Update on Beaglebone Cape for Navspark NS-T The cape [https://blog.dan.drown.org/beaglebone-cape-for-navspark-ns-t/] has been running for 5 days now. I've been tweaking the system to see if I can get it stable. So far, the local clock
navspark Beaglebone Cape for Navspark NS-T Goal My next goal in the quest for a better NTP server is to improve the TCLKIN source. Previously, I was experimenting with TCXO's. I bought a Navspark NS-T (a timing-grade GPS receiver)
gps TCXO + Beaglebone Black, part 2 Starting from the previous TCXO modification [https://blog.dan.drown.org/tcxo-beaglebone-black/], I wanted to get a 24MHz TCXO working. Trial #1 I bought a set of three undocumented 24MHz TCXO's off ebay
navspark TCXO + Beaglebone Black I've added support for an external clock (TCLKIN) to the Beaglebone Black timer driver [https://blog.dan.drown.org/beaglebone-black-timer-capture-driver/]. Setup I used what I had on hand to test it. I setup
gps Beaglebone Black timer capture driver More info on: Hardware [https://blog.dan.drown.org/beaglebone-black-gpstemperature-cape/], Kernel Driver software [https://github.com/ddrown/pps-gmtimer] The Beaglebone Black has a hardware timer capture. This means it can save the couter
gps Beaglebone Black GPS+Temperature cape I moved my Beaglebone Black GPS+Temperature [https://blog.dan.drown.org/beaglebone-black-ntpgps-server/] setup from a breadboard to a proto cape. The soldering isn't great, and the wire I had on had was
gps Beaglebone Black NTP/GPS Server, Temperature Compensation part 2 See the Part 1 of Temperature Compensation [https://blog.dan.drown.org/beaglebone-black-ntpgps-server-temperature-compensation/] or the hardware setup [https://blog.dan.drown.org/beaglebone-black-ntpgps-server/] Overview In part 1, I did a trial run of
gps Beaglebone Black NTP/GPS Server, Temperature Compensation part 1 See also: The hardware/software setup [https://blog.dan.drown.org/beaglebone-black-ntpgps-server/] or part 2 [https://blog.dan.drown.org/beaglebone-black-ntpgps-server-temperature-compensation-part-2/] Overview Chrony (the NTP server software) has temperature compensation built in, using
gps Beaglebone Black NTP/GPS server Goals I wanted to experiment with using temperature measurement to augment a NTP stratum 1 server. I started with a very similiar setup to this one [https://web.archive.org/web/20131209092059/http: