May 13-02 Multi-Sport LED Scoreboard Group Members: Cody Cooke, - - PowerPoint PPT Presentation

May 13-02

Multi-Sport LED Scoreboard

Group Members: Cody Cooke, James Carey, Jamison Voss, Will Petersen, Kyle Pashan, Clinton Young Client: Tim Mobley - Spalding Inc. Faculty Advisor:

• Dr. George Amariucai

http://seniord.ece.iastate.edu/may1302

Problem Statement

• Non-professional leagues are growing

quickly

• No real low cost option available for people

hosting tournaments or sporting events

• Our Goal:

Provide a low cost electronic scoreboard for intramural and recreational leagues

1

Project Scope

• Develop a portable scoreboard for small

scale sporting events

• Needs to cover a variety of sports
• Improve on the limited options currently

available

• Improvement areas:

○ Cost ○ Versatility ○ Portability ○ Usability

2

Demonstration

3

Requirements

Functional

• Wireless connection between the

scoreboard and controller

• Laptop controller

○ Using WiFi to control the scoreboard with a laptop

• Multi-Sport Support

○ Basketball, volleyball, tennis, custom

Non-Functional

• Low production cost

○

~ $300

• User friendly

○

GUI - intuitive functionality

○

Hardware - easy to set up

• Portability

○

Lightweight

• Durability

○

Shock resistant housing

○

Housing made of sheet metal

• Easily readable

○

Bright display

4

Design Approach

5

Current Design

• Original Board: 36" X 24"
• Final Design: 27" X 19"

6

Technical Challenges

• 1. Second semester requirement changes
• 2. Technical hardware issues
• 3. New communication protocol needed to be

user friendly and self-reliant

7

Technical Challenge #1

• Requirements Change

Changes included:

• Elimination of the mobile applications
• Shrink the scoreboard
• Switch from Bluetooth to WiFi
• Removal of RF remote

8

Technical Challenge #1 (cont.)

• Requirements Change

Solution(s): With the new scope and design we just had to adjust our design which includes:

• Smaller dimensions
• Conversion from an ATmega128A to a

Raspberry Pi

• Redesign PCB to handle the components

necessary for the new processor

• Switched focus from Android to web app

9

Technical Challenge #2

• Hardware
• Faulty parts
• Addition of shift register-latches
• Power supply problem
• 7-Segs: wrong type, not bright enough, higher voltage

requirement, Green 7-Segs Solution(s):

• Contacted suppliers for correct parts
• Configuration with common anode devices
• Acquired a new higher power output supply
• Redesigned PCB to accommodate shift registers and

new power supply

Numerous hardware issues. Faulty parts-> client foresight bought double Shift reg for lower number of gpio pins 7-segs big issue common cathode instead of common anode green require higher turnon voltage 12V Currently PCB is redesigned to handle 12 V but due to time and incurred costs we don't have it. 10

Technical Challenge #3

• Board Communication

How to connect a laptop to the scoreboard with minimal user interaction using WiFi and a web browser. Solution: Locally hosted web app - Scoreboard hosts a wireless access point. This allows the board to be controlled with any device that has a web browser and WiFi capabilities. Eliminating software installation.

11

Web App

• GUI

○ HTML, CSS, JavaScript

• Backend

○ Apache, Python

12

Housing

Our team prototyped a plywood housing. Spalding then created a sheet metal housing based on our dimensions.

13

Test Plan

14

During testing if a problem occurs, stop immediately.

Individual Integration Software Web App

Final Product

Deliverables

• Functioning Multi-Sport Scoreboard:

○ An integrated circuit that uses a microcontroller to update the display based input from the web app

• Web App:

○ Wirelessly accessible scoreboard controller ■ Laptop, smartphone, and tablet

• Product User Manual:

○ A detailed description of how to setup and use the scoreboard 15

Side by Side Comparison

Processor:Atmel ATmega Communication: Bluetooth

Low cost Low bandwidth (800 Kbps) Simple to use Range: 5-10 meters Low power consumption Ability to connect to the internet

Processor: Raspberry Pi Communication: WiFi

More secure High bandwidth (11 Mbps) More complex to configure Range: 32 meters indoors and 95 meters outdoors High power consumption

16

Side by Side Comparison

Printed Circuit Board Dimensions: 36in x 24in Printed Circuit Board Dimensions: 27in x 19in 2 verisons of PCB Learned much from this experience Improved organization, addtion of the shift registers Dimensions Smaller dimensions called for some rearranging of the board 17

Side by Side Comparison

Controller(s): Smartphones and RF remote

Smartphone application to be used on smartphones. Radio-frequency remote as back-up.

Controller: In-Browser WebApp

Wider range of accessibility; HTML webpage accessible

• n smartphones, tablets, and computers.

18

Thank You

Special Thanks: Client: Spalding Inc. Client Contact: Tim Mobley Advisor: George Amariucai

Questions?

Demonstration

Test Plan

During testing if a problem occurs, stop immediately.

Individual part testing ○

Test each component for correct functionality

Integration testing ○

Test that the individual parts will work together as the schematics has outlined

Software testing ○

Test the functionality of the GPIO controller scripts

Web app testing ○

Test the connection of the web app by wirelessly simulating a game

Work Plan

Security

• Password protected
• Easily changed
• Ethernet fail-safe