Why diode is a controllable unidirectional device in foot step poewr generation?

In footstep power generation, a diode serves as a controllable unidirectional device by allowing electrical current to flow only in one direction, preventing backflow that could disrupt the system. This ensures that the energy generated from footstep pressure is efficiently directed to the storage or utilization circuit, enhancing overall system stability and functionality. By controlling the direction of current, the diode protects the components and maximizes energy harvesting from each step.