186 doi:10.5281/zenodo.15741536 Development of Human Energy Harvester Using Piezoelectric Materials Arinola Bola AJAYI 1 *, Temitope Elizabeth OYEKANMI 1 , Emmanuel Kolawole OLOWOPOROKU 1 , Adeshola Oluremi Openibo 2 , Musiliu Olalekan ADEYINKA 1 , Babatunde Anthony ASAOLU 1 , Ibrahim Ayinla MAHMUD 1 . 1 Mechanical Engineering Department, Faculty of Engineering, University of Lagos, Lagos. Nigeria 2 Mechanical Engineering Department, Faculty of Engineering, Lagos State University, Epe Campus. Lagos State. Nigeria *Corresponding author: abajayi@unilag.edu.ng ABSTRACT This research work explores how to capture energy from human movement and convert it into usable electrical power that can be stored and utilized later. The research employs the method of utilizing the principle of piezoelectricity to harvest human energy from human footsteps. A model for the piezoelectric energy harvester that works with impact of human footfalls were developed. Energy harvesting is one of the most effective ways to respond to the increasing demand of energy and to produce sustainable power sources from the surrounding environment without polluting the environment. Piezoelectric energy harvester serves as a means of renewable energy and can be employed in densely populated areas for continuous generation of electricity. Piezoelectric energy harvesting uses a direct energy conversion of vibrations and mechanical deformation (gotten from walking on the energy harvester) to produce electrical energy. Experimental results indicated that integrating piezoelectric elements into human activities can yield significant power outputs for low- energy devices. Making use of 84 piezoelectric transducers, 10 LEDs were lit up. It was found that the amount of energy generated varies linearly with increasing weight of persons stepping on the energy harvester, number of persons stepping on it, and the number of piezoelectric harvesters employed in the device. Keywords: Energy harvester, Footfalls, Human Energy, Piezoelectric crystals, Transducers, Vibration. 1. INTRODUCTION The pursuit of sustainable and self-sufficient energy sources has led to significant interest in energy harvesting technologies, particularly those that can harness the ubiquitous mechanical energy generated by human movement [1]. Piezoelectric materials, which convert mechanical stress into electrical energy, offer a promising avenue for capturing this energy and powering wearable electronics, sensors, and other low-power devices [2]. Human motion, whether it be walking, running, or even subtle movements, presents a readily available and renewable energy source that can be exploited through piezoelectric energy harvesters [3]. The development of efficient and comfortable human energy harvesters necessitates careful consideration of material selection, device design, and integration with the human body [4]. This exploration of piezoelectric energy harvesting focuses on the design considerations, materials, and applications of these devices, highlighting the potential for International Journal of Innovative Environmental Studies Research 13(2):186-194, April-June, 2025 © SEAHI PUBLICATIONS, 2025 www.seahipublications.org ISSN: 2354-2918