So, I have a project where I have a bicycle that powers a type of generator. I have everything else done, but I need to pick a generator.
My first problem is that I don't really know which type of generator to use. I am relatively new to electromagnetism, electricity, and engineering in general(I am doing this project by myself, and I am in high school; I do not have a profound background in this type of stuff).
I am debating between using a doubly-fed generator(which is AC), or some type of dynamo(which is DC).
My goal is to charge a relatively large battery. In this regard, which type of generator would be better in terms of general electrical power and cost-effectiveness?