generator

What you'll need cardboard 15cm long iron nail with a 6mm diameter and a large head 8–10cm long bolt with a 6mm diameter, and nut 25m enamelled copper wire (30 swg or approx. 0.3mm diameter)* E825 eclipse button magnet (with a fixing hole)* 6V, 0.06A torch bulb and bulb holder* a roll of...