Generate electricity by punching wood (wood is piezoelectric)

80mV directly from hitting wood with a screwdriver #VeritasiumContest Paper on piezo effect in wood: To recreate this, cut your wood piece with the grain direction aligned with the z axis in figure 1 of the paper. then use copper tape that’s conductive on both sides to attach wires as shown in vid. :// Original tweet with more demo vids: Email: sam@