DIY Physical AI: Turning a Pen Plotter into a Smart Drawing Machine with Gemini API

research #llm 📝 Blog|Analyzed: Feb 26, 2026 17:00•

Published: Feb 26, 2026 08:54

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1 min read

Analysis

This is a fantastic demonstration of how accessible and exciting it is to build physical AI projects! The author cleverly leverages the Gemini API to breathe new life into an old pen plotter, creating a smart device that responds to commands. It's an inspiring project that showcases the creative potential of combining Generative AI with physical hardware.

Key Takeaways

•The project uses the Gemini API for natural language processing to control the pen plotter.
•An old pen plotter was updated with an ESP32 for faster processing and WiFi connectivity.
•The author implemented homography transformation to correct for image distortion when interpreting the drawing canvas.

Reference / Citation

"Gemini APIを利用してかんたんに実装することができましたので、フィジカルAI入門の実装例として是非ご一読ください。"

Z

Zenn GeminiFeb 26, 2026 08:54

* Cited for critical analysis under Article 32.

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Source: Zenn Gemini