Published August 29, 2016 © GPL3+

LED Propeller (Rotating) Display

Persistence of vision enabling a propeller rotating at high speed to appear as a see-through circular display.

IntermediateShowcase (no instructions)15 hours3,366

Things used in this project

Hardware components

Linear Regulator (7805)

DC motor (generic)

IR transmitter (generic)

IR receiver (generic)

Texas Instruments General Purpose Dual Op-Amp

SparkFun LilyPad LED Blue (5pcs)

9V Battery Clip

9V battery (generic)

Microchip AVR 28 Pin 20MHz 32K 6A/D - ATMega328P

DIP Sockets Solder Tail - 28-Pin 0.3"

Jumper wires (generic)

Story

This project was started with the simple principle that is frequently encountered in our everyday life: that is Persistence of Vision. This phenomenon makes one perceive fast moving/changing objects as continuous. A glowing object, if rotated in a circle at fast speed, it appears as a continuous circle. By modifying this basic idea, 8 LEDs can be rotated in a circle, showing 8 concentric circles. But if these LEDs are switched at precise intervals, a steady display pattern can be shown.