Harvest energy using a piezoelectric buzzer

by Carlos Cossio, Santander, Spain; Edited by Charles H Small and Fran Granville, EDN, Mar 20 2008

Focus:
The output of a piezoelectric buzzer can be rectified and used to charge a supercapacitor, which then powers a dc-dc converter and its low-power load.

What you’ll learn:

• How to perform energy harvesting using a piezoelectric buzzer, super capacitor, and simple circuit
• How to build a piezoelectric power source
• How to replace a battery with an energy-harvesting power source

Notes:
An EDN Design Idea

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