When brought together, they make a sandwich: two layers of carbon on the outside, then two layers of paper, and one layer of teflon in the middle.                                A small device made from household materials such as paper, pencil and a teflon tape can generate enough electricity to operate a remote control. A capacitor placed on the circuit absorbs the weak current that is generated. Teflon is then applied to the opposite side of one of the cards.The principle underlying this system is well known: static electricity.A team from EPFL (Ecole Polytechnique Federale de Lausanne) in Switzerland, working with researchers from the University of Tokyo, used these everyday materials to make a tiny device that can generate more than 3 volts of power. Pressing the sandpaper firmly against the cards gives them a rough surface. China key box factoryThey are then taped together in such a way that cannot touch, giving the system a configuration that makes it electrically neutral.By pressing down with your finger on the system, the two insulators come into contact.5 times per second, for a short period of time the capacitor will release the same amount of voltage as that supplied by two AA batteries.Paper and pencil to generate electricity                         A small device made from household materials such as paper, pencil and a teflon tape can generate enough electricity to operate a remote control.