Core Viewpoint - The article discusses the development of the Berkeley Humanoid Lite (BHL), a humanoid robot created by UC Berkeley, which can be 3D printed for under $5,000, making it accessible and customizable for various users [1][3][5]. Group 1: Key Features of BHL - BHL is designed with low production costs, open-source accessibility, and flexibility for modifications [2][7]. - The total cost of BHL is kept below $5,000, with all materials available through 3D printing or online shopping platforms [3]. - BHL utilizes a modular design, allowing users to customize and combine different functional modules for various applications [14][16]. Group 2: Technical Specifications - BHL employs two types of 3D printed joint actuators and an aluminum frame, achieving a mechanical efficiency of 90% [7]. - The robot is powered by an Intel N95 mini PC and a 6S 4000 mAh lithium polymer battery, with a mobile-grade IMU for posture sensing [8]. - The design incorporates cycloidal gear mechanisms to optimize actuator performance while balancing material limitations and mechanical robustness [12]. Group 3: Performance and Applications - BHL has demonstrated impressive capabilities in bipedal walking, operating at only 30% of the actuator's torque limit, indicating potential for larger humanoid robots [21]. - The team has developed a remote operation system using SteamVR technology, allowing for precise control and execution of complex tasks [23]. - BHL is expected to have applications in engineering education and animation, showcasing its versatility [31]. Group 4: Research Team - The research team consists of four Chinese doctoral students from UC Berkeley, focusing on robotic control systems and future iterations of the Berkeley Humanoid project [31][32].