Propeller Display Final Project Presentation Ragnar marsson & - - PowerPoint PPT Presentation

Propeller Display

Final Project Presentation Ragnar Ómarsson & Aníta Björk Hlynsdóttir

Department of Science and Engineering (TVD) Reykjavík University

• 29. November 2012

Introduction

This is a different way to display messages. It is called a propeller display because it has one array of led that spins on a propeller and uses persistence of vision (POV) to display the message. This might get more attention than a regular display.

Ragnar Ómarsson & Aníta Björk Hlynsdóttir, RU Propeller Display, Final Project Presentation 2/16

Background on POV

Persistance of vision is a sort of deception of the eye The concept used for movies shot on film Also the basis for old cartoons

Figure: Example of a film: [1]

Ragnar Ómarsson & Aníta Björk Hlynsdóttir, RU Propeller Display, Final Project Presentation 3/16

Usage

Mostly used for fun by hobbyists Can be used to display advertisements Suitable for home usage

Figure: Example of a POV device: [2]

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Design: Overview

Problem solving Component testing

Motors Sensors

Prototyping Final Build

Figure: The fan motor Figure: The optical sensor

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Bill of Materials: Prototype

The prototype was built mostly out of leftover material lying around the electronics lab and the machine shop. Fan Arduino Uno Optical sensor Vero prototyping board LED, Resistors & Wires Sheet metal POM "Plastic" Plywood

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Design: Prototype

Figure: The prototype Figure: Prototype testing

Ragnar Ómarsson & Aníta Björk Hlynsdóttir, RU Propeller Display, Final Project Presentation 7/16

Final Build: issues

The prototype had some issues that we would have to address in

• ur final build.

Main issues to address: Work on propeller

PCB board Reduce weight Balance the propeller

Clean up design Add real time clock (just for fun)

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Final Build: circuit design

The circuit schematic was done in Eagle.

Figure: The Propeller Display Schematic

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Final Build: design

The Propeller Display main design components:

Figure: Case for front view design Figure: Case for top view design Figure: PCB layout for front view design Figure: PCB layout for top view design

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Bill of Materials: Final Build

The final build was done with the following materials Fan Atmega328 microprocessor Real Time Clock (DC 1307) Optical sensor PCB board LED, Resistors & Wires 9V battery case MDF wood

• misc. screws, paint, etc.

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Final Build: The result

Figure: The product 1 (top view) Figure: The product 2 (front view)

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Software

The devices can be programmed with all sorts of displays. To make the programming easier for us and also to make the main functions more easily readable an Arduino Library was written. The Arduino Library Alphabet contains: Function that specifies which LEDs to use Function that specifies the time for each pixel as well as the time between characters Functions that can write out the characters ’A-Z’, ’0-9’, ’:’, ’/’ and ’-’

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Future Work

This is one of those projects that never end. New ideas are constantly surfacing. Our next steps in this project would be: Adding XBEE or bluetooth module to enable wireless communication with the display Doing additional programming work

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References

[1] Example of a film, Available online at: http://www.sdkerr.com/animation/biffLogo/muybridgeFilmStrip2.jpg [2] Figure of POV device, Available online at: http://www.jeffreythompson.org/blog/wp- content/uploads/2012/04/Unknown3dPersistenceOfVisionProjectMakerFia

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Questions and demonstration

Thank you for your attention, Aníta & Ragnar

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