A $5 Lamp Powered Solely by Gravity
Some people get excited by F1 racing, the Bugatti Veyron, or stuff like the latest iPhone, telling you they are technology enthusiasts or engineering fans.But if you ask me, it's always at the low end of things - like this project - where the really inventive, exciting engineering happening.Sure, something like an F1 car is impressive after a fashion, but considering the price, yeah, well, it better knock my damn socks off or it just looks stupid. Unlimited budgets do not make for impressive engineering, really.Making something that is truly, spectacularly useful like this for $5 ot $10? That is genuinely impressive.