Charging electricity with a piezoelectric generator. - YouTube
Piezoelectric Generator - HardwareBee Semipedia
Source 300W 110V/220V Piezoelectric Ultrasonic Generator Circuit Pcb Board Kits For Ultrasonic Cleaner Tank on m.alibaba.com
Intelligent Cubic-Designed Piezoelectric Node (iCUPE) with Simultaneous Sensing and Energy Harvesting Ability toward Self-Sustained Artificial Intelligence of Things (AIoT) | ACS Nano