Bader Dashti Bill Dunlap Chris Hansen Mechanical Mechatronic - - PowerPoint PPT Presentation

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 D D 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 8 4

• +

LM 393A 1k Ohm D2 LED V + V -

Battery Charging Indicator Circuit

V + V - Charging Source Battery

3 2 1 8 4

• +

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

• ver 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 Sources Source 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 $12,514.14 Total 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.