I don't need to store all that much energy, only about 5v. Its a really small amount but it needs to be a constant power output for slightly more than an hour. I could modify the rest of the design for half the time but I would really rather not. I figure releasing mechanical energy from a spring / coil and converting it to create such a small amount of electricity would be simple enough, but its the constant output over time I’m having trouble with.
Now that I'm thinking, I'm not sure if a governor would even fit this situation.