RF CIRCUIT POWERED BY A PIEZOELECTRIC GENERATOR
Abstract
This study presents a piezoelectric generator powering a radio frequency (RF) transmission system. The objective of the research is to propose a wireless communication system that is self-powered without using conventional batteries. Electricity is generated from the mechanical impact of a small hammer on a piezoelectric stack. An electronic circuit was developed in order to adapt the piezo-generated voltage to levels compatible with the regulatory circuits. The voltage was adjusted to operate a small low-power RF signal transmitter. A receiver circuit validated the message sent by the transmitter. This work presents the voltages produced by the piezoelectric generator and the characteristics of the electronic circuits: the power consumption, transmission response, receiving response considering data sent by the self-powered transmitter.