Detailed Electrical Generator Design

Buck-Boost 5V Regulator

USBPort

Battery With USB

In/Out

USB

V+IN

V-IN

V+OUT

V-OUT

Left Motor-Generator

Right Motor-Generator

Build of Materials

Description Part # CostCost (1000) Quantity Total Total(1000) Link

USB Port87520-0010BLF

$0.71 $0.38 1 $0.71 $0.38http://www.mouser.com/ProductDetail/FCI/87520-0010BLF/?qs=x6EjVpvqMVP/2to87x7cdQ==

Battery n/a $49.95 $39.96 1 $49.95 $39.96http://www.adafruit.com/products/1566#Description

Motor Dc Geared 24V 30RPM 30573 $37.03 $31.92 2 $74.06 $63.84http://www.digikey.com/product-detail/en/30573/CRA206-ND/186746

Outdoor Speaker Wire 6 feet needed n/a $0.78 $0.60 1 $0.78 $0.60

http://www.amazon.com/Cables-Waterproof-Speaker-sequential-markings/dp/B008J4XCB8/ref=pd_sim_sbs_e_1

Voltage Regulator 90400 $7.00 $5.60 1 $7.00 $5.60http://www.prodctodc.com/dc-35v30v-to-40v30v-converter-auto-boost-buck-voltage-regulators-power-supply-module-p-67.html#.UqA3IsRDuz6

Bridge RectifierGBU404DI-ND $1.37 $0.59 2 $2.74 $1.18

http://www.digikey.com/product-detail/en/GBU404/GBU404DI-ND/278605

Custom PCB Board(OSH Park) n/a $3.07 $3.07 1 $3.07 $3.07http://oshpark.com/orders/new/78avpdqg

TOTAL $138.31 $114.63

Buck-Boost Regulator Circuit 5V with 80% Efficiency

*Ordered Premade*

DC Generator• Motor 2.7W• 24V• 30RPM

Battery with Battery Protection • 10,000mAh @ 5V

Outputs up 2ADraws up to 1A

• Dimensions: 2.9" x 1" x 4.9" / 72mm x 24mm x 125mm

• Weight: 300g• 80% Effecant

Simulation

T

Time (s)0.00 2.50m 5.00m 7.50m 10.00m

I(LOAD)

0.00

2.00

MotorL

0.00

40.00

MotorR

0.00

40.00

VOUT

3.00

5.00

VREG

VREG

+

MotorRC13 4.7u C14 1uR5 39k

R2 100k

L1 LDCRL=0.44U DCR=0.32M IC=0

R9 3.01k C17 1u

R10 8.06k

R12 10k

R1 8.25kR3 10k

R7 3.01 C15 100nR6 100kR4 3.01 C18 1n

C1 1.5n

TPS53318TRANSIENT MODEL

PG

OO

D

VIN

_4

LL_5

VB

ST

RO

VP

LL_0

LL_1

LL_2

LL_3

LL_4

VIN

_3

VIN

_2

VIN

_1

VIN

_0

VR

EG

VD

D

MO

DE

TRIP

VIN

_5

EN

GND

RF

VFB

U1 TPS53318_TRANSFAST=1

D1 1N1183

D2 1N1183

D3

1N11

83

D4

1N11

83

D5 1N1183

D6 1N1183

D7

1N11

83

D8

1N11

83

+

MotorL

C2 1n

I(LO

AD):4

RLOAD 137.5m

VOUT

VIN

VR

EG

VD

D

MO

DE

TR

IP

RF

RV

OP

VB

ST

MotorR

MotorL

VOUT

Breadboard Proof of Concept

• Used a Linear Regulator which is less then 50% efficient

• Used a Hand Crank motor• Used a 3.4V Battery

PCB Board Design

PCB Product Ready to Be Ordered

Top Bottom

Electrical Energy Harvesting Overview• Battery = Average 80% Efficiency• Buck-Boost = Average 85% Efficiency• Motors = 2.7W each = 5.4W at 30RPM• 3.456 W generation at 30RPM• 691.2 mA generation at 5V, at 30RPM

Benefits to design• Easily can covert to AC Motor if Needed.• PCB Fits on top of the Buck-Boost Regulator

therefore saving space.• Battery can be charged by a wall charger too.• Arduino boards and other electronics can also be

power by battery therefore opening up further applications and not limiting it to phone charging.