Berlin Uhr Nano

Details

"The time is displayed in a base 5 place value system. ... The first two rows use red lights to indicate the hour, with the top stripe having a glowing segment for five hours and the bottom one for one hour. The current hour results from the addition of the values. Accordingly, the minutes are displayed in yellow segments in increments of five and one in the two lower lines. The lights for 15, 30 and 45 minutes are red for better readability. There is a round flashing light above the lines, which is switched on or off every second." -translated Wiki

https://de.wikipedia.org/wiki/Berlin-Uhr

I wanted to make a (my first in private) PCB with the ws2812 2020 . I have chosen to redo one of my older projects: "Berlin-Uhr remastered". Back then i used a RTC and it drifted quite a bit after 6 Months.
The time provides a time-Server via NTP (Network Time Protocol). For that a WiFi & PW has to be set. Also i added 2 rows of indicators to show the exact second.
At the moment i hard-code it, but i am looking for a way including automatically started AP's, to login a new SSID & PW.

https://hackaday.io/project/173387-berlin-uhr-remastered

Demo:

The soldering:

Files

BerlinUhr.rar

.GBR files for the LED carrier PCB

RAR Archive - 36.75 kB - 07/10/2022 at 12:26

Download

BerlinUhr_Nano_Static_Wifi.txt

Code

plain - 29.92 kB - 07/10/2022 at 12:03

Download

Project Logs

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Fit-test

j • 08/01/2022 at 11:44 • 0 comments

New Wristband

j • 08/01/2022 at 11:34 • 0 comments

Added a new wristband and switch:

The switch is just soldered to a rod and i think i have to desolder it again, when i want to recharge it.

-we'll see about that if this Lipo is empty.

Discussions

hubidrei wrote 07/07/2022 at 14:51

In the 1990s i built one, self designed, with lots of TTL chips (mainly counters) no microcontroller, no clock chip on "Europakarte".

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j wrote 07/07/2022 at 14:56

Did it have micro-controller or did it run only on TTLs and how did it acquire the time ? RTC or did you have to set it and it synced with the netfrequency (50Hz) ?

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davedarko wrote 07/04/2022 at 11:39

nice, will ping @Alex who also made a Berlin Uhr once :)

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j wrote 07/04/2022 at 11:50

Ty!
I know (;
Back then i also made a bigger desktop version with a drifting RTC. I could use my old a bad code again here and i remember i wanted to see his code, but i never asked. I am not sure, if he published it.

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Berlin Uhr Nano

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