This project was a way of using the ongoing power produced from a 100w wind generator and 5w solar panel. The basis of the project was a second hand Sinclair Zeta II bought on eBay for £21 ($40) - originally manufactured from 1997 - 2000 The Sinclair ZETA II consists of a rechargeable battery pack, which powers a lightweight motor unit over the front wheel. Touch a lever, and the unit pivots to bring a pulley-mounted belt into contact with the tyre. Press a switch, and the belt drives the wheel. This belt system is patented by Sir Clive Sinclair. When you no longer need power assistance, a flick of the handlebar switch takes the belt out of contact