High energy harvesting utilizing piezoelectric buzzer was investigated. While external force was applied to the buzzer, PZT unimorph in the buzzer generated resonance vibration. As a result, alternating electric charges were observed. After rectifying, the charges were applied to LED, and new devices such as night-view footwear were developed. It was confirmed that the energy harvesting by this method is one of an effective tool to obtain clean energy.
