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EPICS – Habitat For Humanity
Design Review Presentation
5/22/2017
1
Introduction

Team is divided into two subteams
– Architecture / Web Team
• Point of sales database
• Volunteer construction tutorials
– Energy Team
• Setback thermostat analysis
• Solar powered attic fan
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Introduction

Resale Store’s Point of Sales Database
– Requested by HFH Resale store
– Implemented in Microsoft Access
– Bar Code System to be added to database

Construction Tutorials
– Included in EPICS HFH Web Project
– Increase effectiveness of HFH volunteers
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Introduction

Setback Thermostat Analysis
– Attempt of energy team to decrease
energy usage

Solar Powered Attic Fan
– Idea from previous failed project
– Attempt to decrease energy usage
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Point of Sales Database
Functional Specifications

Problem
– No efficient way of keeping track of the donors of the items in
the resale store and products that are in the resale store
– When item is needed Habitat has to look through the store to
see if they have the item
– No way of keeping track of prices of products
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Costs
– Very time-consuming and is the only solution they have right
now
– No audit of donors and history of what is sold
– Prices are kept in a record book
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Point of Sales Database

Solution
– Database that will allow the user to enter information, query,
and print information about the products in the resale store
and the donors of items in the resale store
– Provide a tool which will organize and manage information
efficiently for Habitat for Humanity

Benefits
– Simplifies the process of organizing and maintaining the
resale store
– Reduces the time needed to find information about a product
in the store
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Point of Sales Database
Technical Specifications

Five tables within a Microsoft Access database
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Donor
Invoice
Product
Product Type
Sold Item
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Point of Sales Database
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Queries
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AllDonors
AllInvoices
AllProdTypes
AllProducts
SearchDate
SearchDonorID
SearchInvoiceNum
SearchProdID
SearchProdType
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Point of Sales Database
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Forms (to add information into the database)
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AddDonor
AddInvoice
AddProduct
AddProductType
AddSoldItem
Reports
– SoldItem (allows the user to print out information about a
product that was sold at the resale store)
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Menu (Add information, search, or print reports)
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Point of Sales Database
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Point of Sales Database

The relationship between the five tables
Product
SoldItem
ProdID
ProdType
DonorID
ProdDesc
ProdPrice
ProdCond
ProdID
InvoiceNum
Invoice
Donor
DonorID
FirstName
LastName
Line1
Line2
City
State
ZipCode
Phone
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ProductType
ProdType
TypeDesc
InvoiceNum
Date
TotalSale
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Point of Sales Database

Interface with Visual Basic and Bar Code
Scanner System
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End Users
– Will be the people working at the resale store of Habitat
for Humanity
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Bar Coding System
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Use of Visual Basic Required
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Use of Bar Coding Software Required
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Use of Bar Code Scanner Required
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Bar Coding System
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Visual Basic used for scanner
– VB code is used to read in the data from the
bar-code scanner
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Visual Basic used to search for Data
– VB code is used to look through MS Access for
data entries
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Visual Basic used for display
– VB code will then display the entry using
Access
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Bar Coding System
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Competitors
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Strengths
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Weaknesses
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Bar Coding System
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Handheld Charge Couple Devices
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Handheld Lasers
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Handheld Wireless
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Bar Coding System
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Handheld CCD’s
– Only Choice
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Handheld Lasers
– Not Cost Effective
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Handheld Wireless
– Possible Future Use
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Bar Coding System
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Charge Coupled Device –
SCCD26
– Cost Effective to Laser
– Reads more than 12
symbologies
– 3.2in width window
– 100 scans/sec
– Keyboard Wedge interface
– 0.36lb
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Bar Coding System

Charge Coupled Device
SCLR17
– Trade off at 45 scans/sec,
but……
– Reads up to 11.8” away
– Broad reading width – up
to 150mm
– All in one built in decoder
– Keyboard wedge interface
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Bar Coding System
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Bar Code Labeling
Software
– Visual Basic 6.0
– Compatible with MS
Access
– 11 symbologies
– Active X Controls
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Solar Powered Attic Fan
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Overview of Requirements for the Solar
Panel
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4 main parts of the Solar Panel Project
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Construction of Macro Design
Design of Tracking System
Design of Charge Controller
Testing and Analysis
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Solar Powered Attic Fan
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Main Components of the Solar Powered
Fan
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Solar Panel (10 Watt DC)
Charge Controller (our design and build)
Battery (Deep Cycle 12VDC)
Fan (14 inch DC 550 CFM)
Tracking System (our
design and build)
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Solar Powered Attic Fan
Circuitry Design - Tracking System
and Charge Controller
 Tracking System
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– 6 various light sensing diodes
– Diodes Summed and compared
– Relays tripped to run motors when
center diodes are less than outside
ones.
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Solar Powered Attic Fan
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Charge Controller Circuit
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Solar Powered Attic Fan
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Charge Controller Parts
– Initial Charging
– Comparator U2
– LEDs
– Construction
– Use
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Conclusion

Point of Sales Database
– Currently involved in its first test run
– Bar Code System design to be finalized and
tested next semester

Solar Powered Attic Fan
– All but tracking to be finalized this semester
– Testing of design without tracking system to
be completed next semester
– Tracking system to be designed next semester
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