Based on the design and major components of this project, write a concise, shorthand, project description. If the existing project description is relevant, be sure to retain any information from it that isn't evident from the schematic. Keep things high-level, and focus on a functional description of the project as a whole. Do not talk about specific components. Update the stored project description, and include a block quote with the new description in your response.
The electronic speed controller (ESC) is an essential part of an electric propulsion system’s hardware. It acts like the brain of the system by telling the motor how fast to go based on data signals it receives from the throttle controller.