This repository is a hardware reference design collection for the LattePanda Mu compute module, an Intel N100/N305-based system-on-module (SoM). It provides complete electrical schematics, PCB layouts (KiCad 8/9), 3D mechanical models (STEP), and pinout definitions for designing custom carrier boards. The repository includes four reference carrier board designs: Full EVA Carrier (DFR1141), Lite Carrier (DFR1142, V1 and V2), GPU Carrier (DFR1144), and Mini Carrier (DFR1293). Each design contains hierarchical KiCad schematics for interfaces such as PCIe x4, HDMI, USB 3.0/2.0, M.2 Key E/M, Gigabit Ethernet, GPIO/I2C/UART, and fan/temperature control. It also supplies BIOS firmware binaries (default, SATA, and carrier-specific branches), Windows driver packages, and mechanical dimension drawings. The repository is not a software application; it is a hardware engineering resource for building embedded system carriers. The codebase consists entirely of EDA files, footprints, symbols, and configuration, with no executable software or data pipelines.