Your question is Architecting a Personal Embedded Project. Take a moment with it on the right.
Talk me through your thinking if you like. When you're confident, submit your answer and I'll grade it like a real screen (7/10 or better passes).
Walk me through the architecture of a personal project you built from scratch. Focus on how you made the key design trade-offs, what you prioritized first, and how you explained those decisions to others or documented them.