As i understood the video, it's a bunch of guys that are enthousiasts and more or less together they did this. Involved in shipbuilding industrial machinery, sometimes you have some wrongly ordered stuff or something falls of a lorry...
Thats just stuff but the amount of time....
I have been busy with automation off the 'plant' a disaster and a fight but I managed to get somewhere. So I have a small understanding how much time this consumes even if you are a pro in that feeld.
For people interested there is so much interesting stuff to improve your setup. I started with arduino, then esp8266 and now you have the pre desessor esp32. Superpower microcontroller and fairly easy to program.
Problem with me was I got cought up with tech progression, each time there was some new chip that was better.
But for people with an interest it's really easy to read a lot of temperatures and display them somewhere easy and cheap.
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The DS18B20 temperature sensor is a 1-wire digital temperature sensor. This means that you can read the temperature with a very simple circuit setup. It communicates on common bus, which means that you can connect several devices and read their values using just one digital pin of the Arduino.
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Magic and cheap.
Was also busy with electronic governer, put a substantial amount of neodium magnets on the flywheel with a hallsensor to get a read out witch had some data instead of a few spokes.
Ok enough
Gr Bernhard