Overview
Pendulino explores the intersection of chaos theory and physical design. A motorized double pendulum creates unpredictable, mesmerizing patterns as an LED traces its path through space.
The system initiates motion with a button press, triggering a full motorized revolution that sets the pendulum into chaotic motion. Wireless power transmission keeps the LED illuminated without constraining movement.
Design Requirements
- Motorized actuation: Button-triggered initial rotation to start chaotic motion
- LED path tracing: Illuminated end effector on the second linkage
- Wireless power: Contactless power transmission from base to moving LED
- Wall-mountable: Compact footprint suitable for vertical installation
- Manufacturable: 3D printable components with standard hardware
- Clean aesthetic: Sleek, minimal appearance that doesn't compete with the motion
Technical Implementation
The system uses an Arduino Nano to control a NEMA-17 stepper motor, providing precise initial actuation. Four inductive coils enable wireless power transmission to the LED, solving the challenge of powering a component in constant, unpredictable motion.
All custom components were designed for 3D printing, allowing for rapid iteration while maintaining the precision needed for smooth mechanical operation. Ball bearings at each pivot point ensure low-friction movement, essential for the chaotic dynamics to emerge.
Key Components
- Control: Arduino Nano with custom circuit board
- Actuation: NEMA-17 stepper motor with 12V power supply
- Power transmission: 4 wireless inductive coils (3.3V output)
- Illumination: LED path tracer on end effector
- Mechanics: 3 ball bearings, 3D printed linkages and housing
- Hardware: Standard fasteners and mounting components
Result
The finished piece successfully demonstrates chaotic motion in a clean, accessible format. The wireless power transmission works reliably, allowing the LED to trace continuous patterns without mechanical constraints. The automated initial actuation provides consistent starting conditions, while the chaotic dynamics ensure each pattern is unique.