Over the past few weeks I've been building a fun hardware and software project: an Arduino-based tennis score counter for my 8‑year‑old. I designed and prototyped the device myself, but leaned heavily on AI copilots — Claude, Perplexity, and ChatGPT — to refine the Arduino code, handle edge‑case scoring logic, and speed up troubleshooting. It's a neat example of how modern AI tools can genuinely accelerate individual makers, turning a spark of an idea into a working gadget ready for the court.