2026-04-242026-04-242026-02-25TAVARES, Gabriel Amaral. Coleta de energia em teclado de notebook utilizando tecnologia mems. Orientador: Roberto Menezes Rodrigues. 2026. 68 f. Trabalho de Curso (Bacharelado em Engenharia Elétrica e Biomédica) – Faculdade de Engenharia Elétrica e Biomédica, Instituto de Tecnologia, Universidade Federal do Pará, Belém, 2026. Disponível em:https://bdm.ufpa.br/handle/prefix/9476 . Acesso em:.https://bdm.ufpa.br/handle/prefix/9476This work presents the study and modeling of a vibrational energy harvesting system based on an array of piezoelectric microcantilevers fabricated in MEMS technology, designed to convert residual mechanical energy from typing into electrical power. The main contribution of the proposed solution is its integration into a 49 cm² area adjacent to a laptop touchpad, enabling the harvesting of vibrations transmitted through the chassis without requiring modifications to the internal key mechanisms. This approach preserves the keyboard’s original ergonomics and tactile feedback, overcoming limitations reported in the literature for invasive solutions. Numerical simulations using the Finite Element Method (FEM) were employed to tune the device to a resonance frequency of 237 Hz. Results indicate that an array of 70 devices can generate an average power of 3.3 μW and a daily accumulated energy of 8.87 mJ, which are sufficient to sustain ultra-low-power subsystems such as monitoring sensors and real-time clock (RTC) circuits. It is concluded that the proposed system reconciles effective micro-scale energy generation with the maintenance of the functional and ergonomic integrity of portable devices.Acesso AbertoColeta de energiaMEMS PiezoelétricoMicrocantileverTeclado de NotebookEnergy harvestingPiezoelectric MEMSNotebook KeywordCNPQ::ENGENHARIAS::ENGENHARIA ELETRICATrabalho de Curso - Graduação - Monografia