The "X-NUCLEO-IHM01A1" is an expansion board for stepper motor control based on the L6474. It offers an easy-to-use solution for driving stepper motors in STM32 Nucleo projects. The L6474's advanced current control and comprehensive protection features provide both high-level performance and durability. The board is compatible with the Arduino UNO R3 connector and supports the addition of other stackable boards for running up to three stepper motors with a single STM32 Nucleo board.