Simple to construct LED display clocks

[Solder_Junkie]

It is surprisingly easy to make accurate clocks based on either a GPS signal, or using network time via a WiFi connection. The image of a built unit (with a green LED) shows a WiFi connected clock that only needs 6 wires, or 4 if you omit the LED "sync fail" LED (the red LED on the right). You can pick any time zone, including UTC.

These projects are not my own design. The software has been tweaked by me with assistance from Claude AI.

Neither of these clocks are accurate to a few milliseconds, but they are good enough to be used as a room clock and are well within one second. Note, the GPS clock will show a few seconds error for at least 15 minutes until the GPS unit has obtained sufficient data to correct the received time.
Both clocks automatically adjust for daylight saving time if set for your local time zone.

The breadboard image is of a GPS based clock and it shows how few connections are needed.

More info on my web pages: https://www.qsl.net/g4aon/clocks/

SJ

[MrAl]

It is surprisingly easy to make accurate clocks based on either a GPS signal, or using network time via a WiFi connection. The image of a built unit (with a green LED) shows a WiFi connected clock that only needs 6 wires, or 4 if you omit the LED "sync fail" LED (the red LED on the right). You can pick any time zone, including UTC.

These projects are not my own design. The software has been tweaked by me with assistance from Claude AI.

Neither of these clocks are accurate to a few milliseconds, but they are good enough to be used as a room clock and are well within one second. Note, the GPS clock will show a few seconds error for at least 15 minutes until the GPS unit has obtained sufficient data to correct the received time.
Both clocks automatically adjust for daylight saving time if set for your local time zone.

The breadboard image is of a GPS based clock and it shows how few connections are needed.

More info on my web pages: https://www.qsl.net/g4aon/clocks/

SJ

Hi,

I used to build that stuff years ago.  Now I buy almost everything unless it is something so special it can't be found anywhere, then I build it myself

[floobydust]

MM5314 forever !

[Renate]

Those waterproof enclosures are somewhat nice, but bulky.
Since I bought my (cheap, 50 €, hand-me-down) 3D printer I will never buy a stock box.
Even if I lose the printer I'll just order my own designs online.
My box design software: https://www.temblast.com/projbox.htm
Just say "no!" to anything with screws going directly into plastic (vs. metal threaded inserts).