Persistence of Vision Device - Rotating light strip draws text in air!
This Persistance of Vision device can display multi-color text using a single line of moving illuminators! This prototype was built for a startup. A larger version of the same, if built, can be installed on top of buildings for outdoor advertisements.

Background

Persistence of vision refers to the optical illusion whereby multiple discrete images blend into a single image in the human mind and believed to be the explanation for motion perception in cinema and animated films.

This slick device consists of 24 RGB dots that rotate and during that time, time slice their illumination to generate any color text or graphics. Whats more? The text could be beamed to the device from a mobile phone through Bluetooth.

RevEngg, Mysuru

We developed this Persistence of Vision Embedded hardware and portions of embedded software for a Startup in Mysuru called RevEngg. (www.revengg.com). RevEngg is startup started by a group of students, while still studying in College.
Video demo of the Persistence of Vision device.


The POV device when switched off.

The POV device was designed to be a table top handy device.

This device consists of a rotating PCB on which a microcontroller, 24 RGB LEDs are placed. When the PCB rotates, a colorful display is generated by time slicing the rotation in microseconds. The timing has to be precise to show the clear picture.

Text to be displayed can be beamed to the device via Bluetooth from a Mobile app developed by RevEngg!

Product and Technology Description

This application was built using high quality RGB LEDs and a microcontroller, fast enough to slice time and display different pixels in a synchronized manner to show steady content.

The device was capable of recieving text or graphic data via bluetooth protocol from a mobile phone, and change the display text or content on the fly!

How it was built?

Click on left/right buttons to scroll through the pictures and description to see how it was built!