Uploaded June 2025 | Updated September 2026, 2 weeks ago

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Mitxela's Precision Clock Mk IV is so precise, you can't see it.

The last two digits, that is... not even the fastest high speed camera I own can clearly see the rollover of the last digit!

I bought my clock assembled from Mitxela, and the batches sell out quickly once made—so you may or may not be able to find a kit or assembled version, but Mitxela also shares the firmware and hardware production files too (they'll be up soon) if you want to make your own!

Links:

- Mitxela's video on YouTube: youtube.com/watch?v=XL2cZjO5IUY
- Precision Clock Mk IV Project page: mitxela.com/projects/precision_clock_mk_iv
- Precision Clock Mk IV Shop page: mitxela.com/shop/clock4

Support me on Patreon: patreon.com/geerlingguy
Sponsor me on GitHub: github.com/sponsors/geerlingguy
Merch: redshirtjeff.com
Main Channel: youtube.com/@JeffGeerling
2nd Channel: youtube.com/@GeerlingEngineering

Contents:

00:00 - The most expensive clock I own
01:29 - Party tricks
02:33 - GPS for time
03:53 - More party tricks
04:22 - Analog display dimming and timing accuracy
05:22 - Designed in a different time
06:54 - Nanosecond-meters (and feet)