Inspiration

The inspiration for this project came from persistence of vision (POV) displays used in holographic advertisements and futuristic interfaces. We wanted to explore how motion and LED timing could create the illusion of floating images in mid-air. Additionally, the challenge of integrating electronics with mechanical motion intrigued us, and we aimed to build something visually striking while improving our skills in hardware and software design.

What it does

The project displays dynamic visual shapes and patterns on a spinning LED board. By utilizing a fan motor rotating at 1000 RPM, the display leverages persistence of vision to make images appear stable. The final result is a floating, hologram-like effect, visible within the custom-built display box for optimal viewing.

How we built it

Our project involves creating a spinning LED display that utilizes a fan motor spinning at 1000 RPM to generate dynamic visual shapes. The LED board is mounted on the rotating motor, allowing it to create a persistence of vision (POV) effect, which makes the images appear stable to the human eye.

To prevent the wires from tangling due to continuous rotation, we integrated a slip ring at the top of the setup. This ensures that power and data can be transferred seamlessly to the LED board while it spins.

For optimal visibility, we constructed a custom display box out of cardboard. This enclosure serves as a shade for the LEDs, reducing external light interference and enhancing the viewing experience. The box not only improves clarity but also adds an aesthetic appeal to the final display.

This project combines mechanical engineering, electronics, and visual design to create a unique and engaging way to display shapes and patterns on a rotating surface.

Challenges we ran into

• Power management & stability – Ensuring the LEDs received a stable power supply while spinning was a challenge, especially considering the rapid movement and voltage fluctuations.
  
• Slip ring integration – Finding the right slip ring that could handle power and data transfer without interference required testing different models.
  
• Vibration and balance issues – Since the LED board was spinning at high speeds, any imbalance in weight distribution caused wobbling, affecting image clarity.
  
• Optimizing the display box – We experimented with different materials and placements to ensure the best contrast and visibility for the projected images.
  

Accomplishments that we're proud of

• Successfully created a working POV display that produces clear, stable shapes.
  
• Integrated a slip ring effectively, solving the issue of tangled wires.
  
• Overcame mechanical challenges to balance the spinning LED board for smooth operation.
  
• Designed and built a functional and visually appealing display box that enhances the final effect.
  

What we learned

• How persistence of vision (POV) works and how it can be applied in creative displays.
  
• The importance of balancing a rotating system to avoid instability.
  
• How to transfer power and data through a slip ring efficiently.
  
• The impact of ambient lighting and enclosure design on LED visibility.
  
• How to troubleshoot electrical noise and interference issues in a spinning circuit.
  

What's next for HoloVision

• Expanding the display capabilities – Adding more LEDs or color variations for more detailed visuals.
  
• Interactive features – Implementing wireless control via a microcontroller to dynamically change images.
  
• Refining the balance & structure – Using better materials for the base and enclosure to improve stability and durability.
  
• Incorporating text and animations – Programming more complex patterns or messages to appear in the display.
  
• Exploring a larger-scale version – Testing with larger displays or multiple spinning LED arms for a 3D holographic effect.
  

Built With

• arduino