Hi! I'm trying to find a way to use piezoelectric materials, and put them under floors or roads so that people's footsteps or a cars wheel will apply pressure on them, therefore creating an electric current. I need to find the materials to create a small square of piezoelectric flooring, so I could step on it and attach a voltmeter/ galvanometer to it to measure how much electricity a footstep could generate. I've heard of things like piezoelectric film, cables, and transducers.. http://science.howstuffworks.com/environmental/green-science/house-music-energy-crisis1.htm So what are all of the materials I would need to create a setup like this? Does anyone have an idea where I could get those materials too? Thanks!