New Tiagra hubs is what I have. They are strong and easy to maintain hubs. Pretty simple mid-level hubs.

You will need a way to get the power from the hub to the electronics.
1- You could charge a battery pack with the dynamo hub and then charge electronics from the battery pack.
2- You could get a converter like these ---> Sinewave Cycles and charge your electronics directly.

There are other types of converters too, fyi.