The allows you to race two cars around a track without needing either battery or mains power. The cars draw power from the electricity you provide from winding the handles on the hand generators.
This Bicycle Powered Generator is a concept design by the designer Elizabeth Joy Wong for a way of converting kinetic energy into electrical energy for everyday use.
If you ever thought about putting up a wind turbine in your garden, you might have been put off by the cost of them. Decent wind turbines easily cost in the thousands in most currencies. If you fancy playing around with a wind turbine, but can’t afford the thousands for a powerful turbine, then perhaps...
