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Wireless Automated News Display (W.A.N.D.). Daniel Karnik, Eric Scott, David Thompson, Ted Wilcox. Overview. Project is a customizable news display Displays headlines, ticker symbols, sports scores Can be set for multiple users or channels Designed as a wireless, low power device

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Wireless automated news display w a n d

Wireless AutomatedNews Display (W.A.N.D.)

Daniel Karnik, Eric Scott,

David Thompson, Ted Wilcox


Overview
Overview

  • Project is a customizable news display

    • Displays headlines, ticker symbols, sports scores

    • Can be set for multiple users or channels

  • Designed as a wireless, low power device

  • Developing a finished product for production

  • Will be marketed to tech savvy consumers


Non recurring cost
Non-Recurring Cost

*Based on four engineers working 12 weeks for 10 hours a week at a $40,000 a year salary.




Objectives
Objectives

  • Range

    • About 10 Meters

  • Transmission Speed

    • Min. 10 KB/s

  • Battery Life

    • Multiple hours of continuous use on a single 9V battery


Objectives cont
Objectives (Cont.)

  • Small Size

    • Volume less than 35 inches cubed

  • Two channels

    • two users or two preferences

  • Simplicity

    • Software automatically downloads RSS feeds from websites and transmits the data to the W.A.N.D.

1.5 “

5 “

4.2 “


Design breakdown
Design Breakdown

The Internet

Internet Connection

W.A.N.D.

W.A.N.D.

software

WirelessUSB

dongle

10 meter

wireless

transmission


Hardware components
Hardware Components

AWP24U WirelessUSB Dongle

Cypress WirelessUSB LP Radio Integrated

Cypress CYWM6935 WirelessUSB Module

Contains Wireless USB LR Radio


Hardware components1
Hardware Components

Crystalfontz CFAH2004A-YTI-JP LCD

Uses standard HD44780 controller onboard.

Cypress PSoCEval1 board

Includes the CY8C29466 PSoC microcontroller (32KB Flash, 2KB SRAM)


Receiver components
Receiver Components

3”

4”

* To Approximate Scale and Location


Battery life

Battery Life

Around 34mA with no LCD or wireless receiver attached.


Battery life1
Battery Life

Energizer datasheets indicate capacity around 600mAh for a 9V battery


Battery life2
Battery Life

  • 600mAh / 34 mA = 17.7 hours of operation

  • Device is not designed to be operated continuously

  • What happens when we attach an LCD?


Battery life3
Battery Life

  • Crystalfontz 20x4 LCD draws just 1.6mA

  • Optional backlight adds 280mA or 60mA (we ordered two types)

  • w/o backlight: 16.9 hours

  • w/ backlight: 1.93 or 6.3 hours


Battery life4
Battery Life

  • How does the radio module affect battery life?

  • Infrequent operation – Check for updates every ~30 seconds

  • Average current is only ~50uA (negligible)


Final battery life predictions
Final Battery Life Predictions

16.9 hours w/o backlight


Wirelessusb basics
WirelessUSB Basics

  • First developed in 2006

  • Sends up to 50 meters at 1 Mbit/sec

  • Operates in 2.4 GHz frequency Range

  • Primarily Used for HID implementations


Wirelessusb comparison
WirelessUSB Comparison

  • Lower cost than competitors

  • Low power requirements

  • Seamless system integration

    • Works basically as if device was wired

    • Connection transparent to designer at OS level

    • No drivers needed

  • Works well in “noisy” environments

  • Lower data transmission rate than alternatives


Pc software
PC Software

  • C++ Programming Language

  • Components of Software

    • Feed Retrieval and Processing

    • Sending of Feeds to Device

    • User Interface Layer


Software flow
Software Flow

Initialize

Get

Feeds

On?

yes

Retrieve

Feed

Process

Feed

Write

To File

no

End of File?

yes

no

Reset Timer

no

yes

Time?

Wait for

Time Out

On?

Send

Feeds

yes

Send

no