Here's some pics:
At the track:
https://drive.google.com/file/...TZj/view?usp=sharing
Notice the battery. This 35ahr will run the clock for about 14 hours:
https://drive.google.com/file/...VEE/view?usp=sharing
Here's the clock at a distance
https://drive.google.com/file/...dnM/view?usp=sharing
And the electronic guts:
https://drive.google.com/file/...cDQ/view?usp=sharing
The Raspberry PI with WiFi:
https://drive.google.com/file/...QnM/view?usp=sharing