Horloge de sable Elektor pour Raspberry Pi Pico

A fun little project. A nice challenge on a rainy day! You really need to read the build manual and watch the video, otherwise you will miss some important nuances. The vibration motors are loud and are a bit distracting. I may try another scheme to see if it can be done more quietly. I wish there was a way to flip the digits as you need to look over the pen servos to read the time. I have no idea what the three buttons are for as there is no info in the manual on their usage. It would also be nice to list the requirements for the USB PSU. I like using the acrylic material however, it is prone to cracking. I would be interested in building other projects with the Pico RTC/driver board, but I don`t see it anywhere on the Elektor site.

Ab Software V1.4 funktioniert der autonome Modus in V1.3 war die RTC nach einem Powerup wieder auf 01.01.2000 zurückgesetzt.
Ach und die Baudrate: keine Angabe in der Anleitung (9600 im Kommentar der ino) aber `Serial.begin(11520)`.
Auf der Basisplatine sind 3 Taster, 1 x Uhrzeitausgabe und 2 x nicht dokumentiert.
Und was macht der Messingstift unter dem Pico?!

Sehr kleine Schräubchen 2mm, 2,5mm, 3mm.. und keine Stückliste, wie viel Schräubchen benötigt werden (es bleiben ein paar übrig), es werden 3 Hände mit kleinen Fingern für die Montage der Servos benötigt.
Keine deutschsprachige Dokumentation!?

Kit kommt inklusive Sand, von dem aber nur die Hälfte verwendet werden sollte. Die Vibration braucht dann ca. 10 Sek. zum Glätten der `Anzeige`.

Neue Herausforderungen:
- Uhrzeitgravur um 180° gedreht ausgeben, damit der Pantograf hinter dem Sandbett positioniert werden kann.
- Angabe der Startzeiten für Intervall 5 bzw. 15Min.

A neat kit - relatively easy to assemble with a few `fiddly` moments (if someone could come up with an easy way to remove the protective film). Watch the video and read the manual first and apart from one or two moments everything is clear.
Calibration and testing went well - but autonomous mode just runs the vibration motors using the code supplied but should be an easy fix. They are rather noisy too - if thinking of running it as a clock.
So - an interesting project and a neat conversation starter.

Got mine as a gift, was very excited!
Ran into quite some issues:
- Link to library mentioned in manual no longer exists (404)
- Holes in acrylic parts are not pre-threaded/tapped
- Difficult to tell which bolt/**** to use. Some look very similar.
- The "When the sketch starts up, it first checks if there’s valid calibration data
in the EEPROM" part of the manual was unclear. How/where should I start it up? Please make the manual a bit more elaborate.

One of the acrylic parts needed to be screwed using an M3 bolt which in theory should self-tap a thread. I was being gentle like the manual mentioned, but it still snapped the acrylic part directly in half...

It's way too fragile. And what now? I can't finish it. There are no spare parts. I'm just left with a broken kit now.