Core Viewpoint - The article discusses a significant find of a nearly new Ninebot electric scooter controller purchased for only 28 yuan, highlighting its impressive build quality and components [7][9][78]. Group 1: Product Overview - The controller model ZWK048020A was noted for its excellent condition and recent manufacturing date of November 2024, suggesting minimal usage [9]. - The controller features a power control architecture with a metal base and a separate control board, which enhances thermal management and reduces manufacturing complexity [78]. Group 2: Component Analysis - The power board contains 12 MOSFETs from Silan Micro, specifically the SVG105R4NS, rated at 100V and 120A, with a low on-resistance of 5 milliohms [32]. - The control board utilizes an AT32F415CCT7 microcontroller from Aotule, and includes two TLV9084 chips from Texas Instruments for current sampling [62][64]. - The controller employs a CAN bus system, which limits its usability across different vehicles, contributing to its low resale value [66]. Group 3: Design Features - The controller's design includes robust protection for signal ports and a heavy metal casing, weighing approximately 1 pound, which is likely made of cast iron [72][78]. - The separation of the power and control boards allows for better heat dissipation and higher current handling, while also simplifying the design and reducing costs [78].