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   Jeff Geerling (geerlingguy@mastodon.social)'s status on Friday, 28-Mar-2025 23:19:59 JST Jeff Geerling

   For the past few months, people have been asking me about these two clocks that keep showing up in my videos—one in my rack, another at my desk.

   Both are PoE-powered NTP clocks from a local company called Masterclock 🧵

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     Jeff Geerling (geerlingguy@mastodon.social)'s status on Friday, 28-Mar-2025 23:19:59 JST Jeff Geerling

     in reply to

     In that second picture is my 'Time Pi', a project I've been working on for over a year which runs a Raspberry Pi as a Stratum 1 NTP/PTP server with a timing-specific GPS module from u-blox. More details on my blog: https://www.jeffgeerling.com/blog/2025/diy-ptp-grandmaster-clock-raspberry-pi

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     Jeff Geerling (geerlingguy@mastodon.social)'s status on Friday, 28-Mar-2025 23:19:59 JST Jeff Geerling

     in reply to

     I was honored to be visited by John Clark (Masterclock's CEO) and Dr. Demetrios Matsakis, former Chief Scientist at the US Naval Observatory, a physicist who contributed much to our understanding of time (and it's measurement). We spoke at length about DIY timing solutions!

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     Jeff Geerling (geerlingguy@mastodon.social)'s status on Friday, 28-Mar-2025 23:19:59 JST Jeff Geerling

     in reply to

     The result of those many months of work is this first video in a series on time and timekeeping with a Raspberry Pi time server (called 'Time Pi'), and that video is out this morning! Watch it here: https://www.youtube.com/watch?v=zT71UvUxhjU

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