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beagleboneblack

A collection of 10 posts

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

  • Dan Drown
1 min read
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

  • Dan Drown
2 min read
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)

  • Dan Drown
3 min read
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

  • Dan Drown
4 min read
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

  • Dan Drown
2 min read
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

  • Dan Drown
2 min read
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

  • Dan Drown
1 min read
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

  • Dan Drown
2 min read
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

  • Dan Drown
3 min read
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:

  • Dan Drown
3 min read
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