PCB size and construction - PCB size: 145 mm x 111 mm (excluding connectors) - SMD components are pre-soldered; magnetic rings must be wound by the user - The PCB indicates how many turns (circles) each magnetic ring should have - Net weight: 142 g Key benefits - Reduces assembly time with ready SMD soldering on the board - Allows customization of inductive elements by winding magnetic rings to the printed turn counts - Clear guidance directly on the PCB helps ensure correct winding configuration and repeatable results What makes it stand out - Combines pre-soldered components with user-wound magnetic rings for flexible coil customization - Turn-count information printed on the board provides precise winding instructions at a glance - Compact yet robust design with precise 145 x 111 mm footprint Use scenarios - Prototyping a custom coil module for experimental electronics where the inductance is tuned by winding the magnetic rings to the specified turns - Educational demonstrations to illustrate the relationship between coil turns and inductance in a classroom or lab setting - DIY projects or small-scale magnetic actuation experiments where a user-defined winding configuration is required