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I modded a 30-year-old GPS Time Server (Telstra should've)

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Source: Jeff Geerling
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  • updated_at: 2026-09-20T01:00:00Z
  • description: Timing is everything. More about Telstra's GNSS timing-related outage: - https://hackaday.com/2026/08/27/australias-nationwide-phone-outage-was-an-embarrassing-failure/ - https://www.abc.net.au/news/2026-09-02/telstra-outage-review-findings-known-network-issues-not-priority/107106588 Some of the projects I built, contributed to, or used: - Jimmy Paputto GNSS HAT: https://github.com/jimmypaputto/gnsshat - Densitron LCD: https://github.com/geerlingguy/densitron-lcd - Time-Pi Fan Control: https://github.com/geerlingguy/time-pi/tree/master/fan-control - Time-Pi Chrony Dashboard: https://github.com/geerlingguy/time-pi/tree/master/chrony-dashboard - TrueTime Pi Mounting Bracket: https://www.printables.com/model/1832259-truetime-pi-mounting-bracket - Right-angle HDMI and USB-C Adapter: https://deskpi.com/products/deskpi-kl-p24-raspberry-pi-adapter-board And here's the EEVBlog forum thread on the TrueTime XL-AK: https://www.eevblog.com/forum/projects/symmetricom-truetime-xl-dc-gpsdo/msg6292664/#msg6292664 A few people asked about the wire wrap tool; it's a WSU-30M and I got it for $30 on Amazon here (affiliate link): https://amzn.to/3SzaRFD Support me on Patreon: https://www.patreon.com/geerlingguy Sponsor me on GitHub: https://github.com/sponsors/geerlingguy Merch: https://www.redshirtjeff.com 2nd Channel: https://www.youtube.com/@GeerlingEngineering 3rd Channel: https://www.youtube.com/@Level2Jeff Contents: 00:00 - A ticking Time bomb 01:33 - Two big problems 04:11 - The plan 04:45 - Teardown 06:49 - A Pi and a GNSS HAT 08:51 - Old batteries 10:56 - A closer look at the HAT 13:40 - Hacking the Densitron LCD 14:51 - Designing a mounting bracket 16:54 - dupont too tall 18:24 - Retro PLA and almost forgot the LED 19:38 - Learning a new old skill 21:25 - Wire wrapping 22:09 - As excited as I'll ever be 22:52 - Three more projects in four more days
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