bader dashti bill dunlap chris hansen mechanical ......bader dashti bill dunlap chris hansen...
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Bader Dashti Bill Dunlap Chris Hansen
Mechanical Mechatronic Mechanical
Ahmed Kamfar Alexander Kendrick
Mechanical Mechanical
Sponsor: One Media Player per Teacher
Faculty Advisor: Professor Gregory Kallio
� 75 million children do not have access to
primary school
� 776 million adults lack basic literacy skills.
� One Media Player per Teacher (OMPT)
� Mini-projectors and digital audio devices
� Projector issues with battery recharging
� Solar panels
� Existing hand crank generators
� Problems with existing models
To research, design, build and test a
prototype of a multifunctional human
powered generator that is more
ergonomically efficient than currently
available models.
Requirement Metric Method / Device
Weigh no more than 14 lbs lb Scale
Max size – 2’ wide x 1.5’ tall x 3’ long feet Measuring tape
Fully charge a 3.7 V, 1700 mAh lithium-ion battery
in 2 hours
Voltage/
Current
Multimeter
Protect batteries from over voltage and over
current
Integrate small solar panel
Indicator that battery is fully charged
Be capable of connecting to different sized
batteries
Portable – easy to transport by single individual
Have an onboard battery
Easy to operate
Requirement Metric Method / Device
Inexpensive – around $70 U.S. Dollars Total price of unit
Protect from weather durability Stress tests
•Water resistant seal Depth test
•Dust resistant seal
•Sun resistant UV resistance Material Analysis
Primarily plastic construction
Requirement Metric Method / Device
Durable – last at least 5 years durability Stress tests
Onboard storage of battery that is being charged
Readily Available Parts for Field Repair
Voltage 12V
Current 125 mAh Max
Power 1.5 W
Dimensions 13.75 x 4.75 x .5“
Weight 1.6 lb
Rated Rotating Speed : 2800 rev/min
Total Gear Ratio of 28:1
Outer gear at 1.66 rev/sec
Rated Current : ≥1000mA
Generates 3-phase AC output
Rectified DC Output: ≥18.2V DC
Lifetime: ≥3000h
Made of 2 2200mAh cylindrical 18650 cells with PCB and polyswitch for full protection
Built-in IC chip will prevent battery pack from over charge and over discharge
Capacity: 2200mAh
Voltage: 7.4V
Dimensions: 2.63 x 1.45 x 0.7 inch
Weight: 3.5 oz
Max. Charge Current: 1C (2.0A)
Max. Discharge Current: 2.5C (5A)
Cut off voltage: 6V
Manufacturer's Part Number: 31003
� Frame-Addition of an aluminum frame
� Case- Redesigned as a thin plastic case
� Pedal-Plastic surface with aluminum struts
� Flywheel- Custom aluminum casting
� Driveshaft-Formed using a steel rod
Drive Shaft
Flywheel
Analysis of
drive shaft with
4x rated
loading of
generator.
Even under
extreme
circumstances,
the shaft
experiences
stress well
below it’s yield
point.
� Case side with load
incident on drive shaft
mount section.
� Load is 2 x the
maximum human
loading on the device
Diodes: 1N4001
Capacitors: 10 uF
Resistor 2 : 56k Ohm
Resistor 1: 82k Ohm
Voltage Regulator: 7805
D D D
DD D
C
V B
V A
Dynamo
V C
V -
V +
Bridge Rectifier Circuit
5V
Regulator
C C
V +
V -
USB
Port
D1
Vcc
Internal
Gnd
D2
USB Port Circuit
R1 R1
R2
R2
Data Lines at 2 V
Capacitors: 10 uF
LM 393: Voltage Comparator
LM 317 Regulator Formula:
1.25( 1 + 1370/240) Volts = 8.4 Volts
Adjustable Voltage Regulator
C C
V +
V -
Battery Voltage Reduction Circuit
240 Ohm
1370 Ohm
V +
V -
8.4 V
LM 317
1M Ohm
2.2k Ohm
10k Ohm
1 Ohm
1N5819
3
2
1
84
-
+
LM 393A
1k Ohm
D2
LED
V +
V -
Battery Charging Indicator Circuit
V +
V -
Charging Source
Battery
3
2
1
84
-
+
LM393
C
1370 Ohm1
240 Ohm
LM 317
D D D
D D D
C
V C
V B
V A
Dynamo
V +
V +
V -
Solar Panel
Diodes: 1N4001
Resistor 1: 82k Ohm
Capacitors: 10 uF
Voltage Regulator: 7805
Resistor 2 : 56k Ohm
5V
Regulator
C
V -
V +
USB
Port
D1
Vcc
Gnd
D2
Internal
R1 R1
R2 R2
Data Lines at 2 V
1M Ohm
2.2k Ohm
10k Ohm
1 Ohm
1N5819
1k Ohm
LED
V -
V +
7.4 V Battery
� Multimeter attached to
leads from projector
battery.
� Monitors voltage at
ten minute intervals
over the course of the
charge cycle.
Part Projected
Cost
Fasteners (Screws, Nuts
Bolts, Washers)
$33.20
Electrical Components $24.61
Solar Panels $16.08
Plastic Components $31.95
Batteries $21.95
Mechanical Components $111.51
Misc. $65.97
Total Cost (per prototype) $305.27
Table 9.3- Funding SourcesSource Amount
One Media Player per Teacher $1,500.00
Associated Students Sustainability
Fund
$3,500.00
Total Funding for Project $5,000.00
Table 9.2 Hours
Name Total
Hours
Total Cost Per Person
Bill 112.5 $14,647.50
Chris 119.5 $13,472.43
Bader 105.5 $11,894.07
Ahmed 106.5 $12,006.81
Alex 111 $12,514.14Total
Cost $64,534.95
� Problems include� The weight requirement of the project.
� Alignment of the dynamo to the flywheel
� Material selection
� Recommendations� Single frame
� PCB
� Larger onboard battery
� Custom solar panel
� The current design prototype fulfills most of
the requested specifications given by the
sponsor, One Media Player per Teacher.
� With this in mind, our sponsor can proceed
with implementation of the generator in the
field where it is most needed.