The bike
“What is this?”
“Bike, for home exercise.”
“Yeah, but what are you doing with it?”
“I just want to add a dynamo to it, like old bikes had, to make electricity which will charge battery, which will give me light at night from led lights. Maybe even equipped all outdoor bikes with it, with a battery on them, which you take home, plug it in a socket and have light for the night, or at least part of it.”
“Can an additional small dynamo be put on hydro powered dam?” “I don't know. Maybe, maybe not.”