X-NUCLEO-IHM13A1 Expansion Board STMicroelectronics X-NUCLEO-IHM13A1 Expansion Board is based on the STSPIN250 low voltage brush DC motor driver. The X-NUCLEO-IHM13A1 provides an affordable and easy-to-use solution for the implementation of portable motor driving applications like thermal printers, robotics, and toys. The X-NUCLEO-IHM13A1 is compatible with the Arduino UNO R3 connector and most STM32 Nucleo boards.