EL HMAMSY, Y., C. ENNAWAOUI, and A. . HAJJAJI. “Study and Design the Circuit for Piezoelectric Vibration Energy Harvester to Charge a Datalogger”. International Journal of Engineering and Applied Physics, vol. 1, no. 1, Jan. 2021, pp. 18-25, https://ijeap.org/ijeap/article/view/12.