Conversely, when applying an electric field to the piezoelectric material, it deforms, resulting in dimensional changes [1]. With technological advancements, new materials and methods have emerged, as seen in the literature [1,2]. [PERSON] et al. [2] presented an energy generation configuration based on piezoelectric elements with two storage methods: capacitor and nickel-metal hydride battery. The capacitor has been widely used for storing the generated electrical energy. The generation structure consists of a piezoelectric transducer PSI-5H4E coupled to an 80 mm aluminum beam. Meanwhile, [PERSON] et al. [3] implemented a mechanical system with a circuit synchronized to the system's vibration to enhance energy transfer efficiency. The proposed circuit includes a full-wave rectifier and a buck-boost DC-DC converter as the load, resulting in an efficiency of 88%. Recently, many articles have modeled energy harvester systems with piezoelectric transducers as mass-spring systems, such as cantilever beams, operating in the resonance region [4, 5, 6, 7, 8]. These systems collect mechanical vibrations, primarily at low frequencies, and convert them into electrical energy, reaching maximum potential. [PERSON] et al. [9] developed a project for a mini wind turbine using piezoelectric transducers for low-power devices. The prototype allows for the control of dimensions, geometries, and masses attached to the end of the beam to achieve the highest potential possible. Excitation is performed by permanent magnets attached to the generator shaft, interacting with the free end of a steel beam. The study used a PZT C-64 and achieved a maximum output power of 2.06 mW for a single beam and 3.78 mW for three beams in parallel, with power densities of 18.8 \(\mu\)W/mm\({}^{3}\) and 11.5 \(\mu\)W/mm\({}^{3}\), respectively. In this research, we present an electrical power generation system utilizing the piezoelectric effect in transducers coupled to a free-clamped beam. Controlled excitations were performed using an electromechanical shaker. We assessed the power and generation efficiency with different loads: pure resistive, capacitive resistive, and nonlinear (full-wave rectifier). The generated power is developed based on the characteristics of each load. Additionally, we conducted modeling with piezoelectric generators coupled to the beam, selecting the most effective loads. We compared power generation results with different load types to analyze their influence on the piezoelectric generator and, finally, evaluated the load generated in a low-energy-consumption application. The objective of this study is to extend these findings by investigating the efficiency of piezoelectric transducers in low-power systems, targeting applications where vibrational energy is already present in the environment, such as in machinery, operating vehicles, or wearables like smart footwear, implantable technology, and smart fabrics [10, 11, 12, 13]. By exploring the feasibility of energy harvesting in these contexts, the aim is to demonstrate that it is possible to harness these vibrations to power low-power devices, reducing the need for external energy sources. The structure of this paper is organized as follows: Section 2 presents the energy conversion mechanisms involved in the piezoelectric effect and provides details about the transducers and circuits used. Section 3 outlines the methodology, including the analytical modeling and experimental setup for evaluating the power generation system. Section 4 discusses the results of the experiments and simulations, comparing the performance of the two transducers (PZT-5H and P5-13B) under different load conditions. Section 5 concludes the study, summarizing the key findings regarding the energy harvesting capabilities of the transducers and providing insights into their practical applications in low-power systems\".