1. Teaching video on collecting hands and handles 2. Curriculum progression from easy to difficult, with introduction and improvement from 0 to 1; covers digital circuits, C language basics, 51 microcontrollers, and commonly used peripheral modules 3. Solid foundation for study and future employment 4. Video tutorials plus PDF documents; videos facilitate learning and understanding, while PDFs serve as review and reference material; combining both supports ongoing learning 5. Use scenarios a) Students seeking foundational knowledge in digital circuits, microcontrollers, and C programming b) Professionals aiming to upgrade skills for embedded systems and related applications c) Selflearners preparing for exams or certifications with integrated learning and review resources 6. Format and accessibility a) Video files in standard formats b) PDF documents in standard format c) Compatible with common devices and software for easy viewing and reference 7. Key attributes a) Function: structured learning resource for electronics and programming b) Topics covered: digital circuits, C language basics, 51 microcontrollers, commonly used peripheral modules c) Learning approach: progressive difficulty from easy to hard, zerotoone introduction and improvement d) Resource mix: instructional videos plus reference documents for comprehensive understanding