Uploaded January 2026 | Updated September 2026, 1 week ago
Very short demo of "On-demand Sync Clock (OSC)".
This is an open-source, DIY smart table clock that synchronizes with NTP servers on-demand via a button press, calibrates its RTC drift automatically, and runs for months on a battery.
The DS3231 calibration will be enabled after 14 days from the previous sync, to gain a resolution smaller than 1 ppm (part-per-milion).
The distinctive feature of this clock is its effortless adjustment (sync) and calibration: Simply press the push-button while an open network (Wi-Fi without password) is available, for instance, a smartphone hotspot: See youtu.be/2SDDaN3pt_c
More about this project at: instructables.com/On-demand-Sync-Clock-OSC
.... and yes, I could not manage a decent 3D printing with this filament :-(
Very short demo of "On-demand Sync Clock (OSC)".
This is an open-source, DIY smart table clock that synchronizes with NTP servers on-demand via a button press, calibrates its RTC drift automatically, and runs for months on a battery.
The DS3231 calibration will be enabled after 14 days from the previous sync, to gain a resolution smaller than 1 ppm (part-per-milion).
The distinctive feature of this clock is its effortless adjustment (sync) and calibration: Simply press the push-button while an open network (Wi-Fi without password) is available, for instance, a smartphone hotspot: See youtu.be/2SDDaN3pt_c
More about this project at: instructables.com/On-demand-Sync-Clock-OSC
.... and yes, I could not manage a decent 3D printing with this filament :-(
