Academic Journal of Engineering and Technology Science, 2025, 8(4); doi: 10.25236/AJETS.2025.080410.
Zeyuan Wu
Chiway Repton School, Xiamen, China
In contemporary society, improving energy utilization efficiency has become a critical issue, articularly given the inevitable energy wastage in daily activities. This study proposes an innovative approach to recover and utilize energy losses during writing activities, specifically targeting the minute deformation energy generated when the pen tip contacts paper. The design employs ceramic piezoelectric materials, which generate electrical charges under mechanical stress—a property widely utilized in energy harvesting technologies. During writing, the axial force generated at the pen-paper interface induces slight deformations in the piezoelectric sheets. Through the piezoelectric effect, these mechanical deformations are converted into electrical energy. Preliminary investigations revealed that the piezoelectric sheets produce alternating current (AC), while the system's capacitors are designed for direct current (DC) storage. Consequently, the circuit design must incorporate a rectifier to enable AC-to-DC conversion. This stored energy could potentially power auxiliary devices or enable additional functionalities, thereby achieving our objective of energy recovery from routine writing activities.
Piezoelectric Energy Harvesting, Smart Pen Control System, Energy Rectification and Storage
Zeyuan Wu. Design and Energy Optimization of an ESP32-Based Smart Control System for Piezoelectric Energy-Harvesting Pens. Academic Journal of Engineering and Technology Science (2025), Vol. 8, Issue 4: 72-78. https://doi.org/10.25236/AJETS.2025.080410.
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