Consumer Electronics and Minority Demand Requirements: Non-mainstream hardware adaptation (such as Raspberry Pie CM4 extended PoE power supply), retro equipment modification (such as customized Mini-ITX motherboard for Intel LGA775 platform). Features: Through modular design (such as pluggable interface card), the development cost is reduced, and the personalized requirements are met. Third, the production process and technical points 1. Design stage Tools: Use EDA software (such as Altium Designer) to draw schematic diagram, plan signal routing, power distribution and heat dissipation path, such as multi-layer PCB(6-10 layers) for complex circuit isolation. Key links: domestic chips (such as Feiteng and Megachip) should be selected first to meet the requirements of Xinchuang, or industrial-grade devices (such as military-grade connectors) should be selected for special scenes.