The most accurate clock in a mini rack
I wanted the most accurate clock possible in my mini rack. But nobody makes clocks for mini racks!
So I made my own.
Parts required for this clock build (some links are affiliate links):
Waveshare L76K GNSS Module for Pi Pico: https://amzn.to/4nKlL5J
Adafruit 0.56" 4-Digit 7-Segment Display w/I2C Backpack: https://www.adafruit.com/product/879
Raspberry Pi Pico 2 (with Headers): https://www.raspberrypi.com/products/...
If you don't have the 'with Header' version, solder on 2x 20 pin headers: https://amzn.to/4jClLn1
Waveshare L76K GNSS Module for Pico: https://amzn.to/4qgiFaQ
15cm jumper wires: https://amzn.to/4aT5jwj
1220 3V Lithium coin cell battery: https://amzn.to/3YzptnL (if you want RTC clock holdover)
M2x6mm screws: https://amzn.to/45NaeLM (optional, to hold the display in securely)
Full instructions and code on GitHub, in my time-pi project:
https://github.com/geerlingguy/time-p...
3D design files for printing are on Printables:
https://www.printables.com/model/1549...
Support me on Patreon: / geerlingguy
Sponsor me on GitHub: https://github.com/sponsors/geerlingguy
Merch: https://www.redshirtjeff.com
2nd Channel: / @geerlingengineering
3rd Channel: / @level2jeff
Contents:
00:00 - A Pico GPS Clock
02:34 - Modeling a 1U mini rack panel
05:59 - Clock face extrusion
07:19 - V3 and day two
08:22 - V4 clock and Pico fitment
10:17 - Debugging the clock
11:17 - LCD Lenses and Kapton test
12:25 - PPS and 1U mini rack