Motion-Activated Rotator Mechanism

I'm looking for an automatic, portable motion sensor-based rotator. The primary function is to rotate based on human movement detection.

Key Requirements:
- Rotate to a specific angle upon detecting human movement.
- Portable and easy to set up.
- Motion sensor sensitivity to human movement.
- Mechanism to halt rotation at a specified angle.

Ideal Skills and Experience:
- Experience with motion sensors and rotator mechanisms.
- Knowledge in electronics and automation.
- Ability to create portable, user-friendly devices.

Please provide detailed bids with relevant experience.