Motion-Detecting Anti-Suicide Fan

I’m putting together a small proof-of-concept fan that shuts itself off the moment motion is detected near the blades, demonstrating a simple yet effective anti-suicide safety measure. The scope is intentionally compact—a “mini project” rather than a full production build—so I’m looking for someone who can quickly integrate a motion-sensing module into a standard ceiling or table fan and show that the fan powers down within a fraction of a second when movement is picked up.

What I need from you
• Sensor integration: choose and wire an appropriate motion sensor (PIR, ultrasonic, or similar) to a microcontroller or relay that kills the motor instantly.
• Schematics & parts list: clear wiring diagram and list of readily available components.
• Firmware / control logic: concise code or relay logic that handles sensor readings and triggers the shut-off reliably.
• Demonstration proof: photo set or short video confirming the system reacts consistently and resets safely.

I’m fine with Arduino, ESP, Raspberry Pi Pico, or any other low-cost platform you’re comfortable with, as long as the response time is fast and the parts are easy to source. Keep the build clean and simple—this is for demonstration, not long-term installation—yet robust enough that I can replicate it on my bench without surprises.

If you’ve done safety interlocks, motion-triggered devices, or quick-cut motor controls before, this should be a straightforward win. Let me know what sensor you plan to use, the estimated shut-off delay you can achieve, and how soon you can deliver the materials above.