PIEZOELECTRIC ENERGY HARVESTING PEN

Author(s)	Prof. Supriya Parashuramsingh Rajput, Prof. Kshitijarun Y Bidari
Country	India
Abstract	This paper presents an experimental study on electrical energy harvesting from human finger pressure using piezoelectric transducers integrated into a pen-based system. Multiple piezoelectric sensors are connected in series to enhance the output voltage generated during normal writing and repeated pressing actions. The mechanical excitation produces an alternating electrical output, which is converted into direct current using a full-wave bridge rectifier. The rectified output is further conditioned through filtering, current limiting, and voltage protection circuits to ensure safe operation. The harvested energy, typically in the range of 0.6 to 1.5 mW, is regulated and stored in a rechargeable battery or supercapacitor for later use. The results demonstrate that routine human activities such as writing can serve as a practical source of low-power electrical energy.
Keywords	Piezoelectric, Energy harvesting, Energy storage, Rectifier.
Field	Engineering
Published In	Volume 7, Issue 1, January-February 2026
Published On	2026-01-18
DOI	https://doi.org/10.63363/aijfr.2026.v07i01.2972
Short DOI	https://doi.org/hbk6zw

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