link:s://:.aetherforce.energy/diy-symbolic-hieronymus-machine-by-josephmax/
You don't need any electronics to build it. Just print it out and use anything you like for the dial, you could even use a bottle cap.
Results have been quite positive so far.
I do it twice once for the finals and the the first digit.
The dial goes from 0 to 90.
Unfortunately the topic he used it on was the election but it can be used for roulette too.