Energy Tracking &
Storage for an
Autonomous System
OASIS
Mir Ziyad Ali
Liron Kopinsky
Christopher Wallace
Sarah Whildin
Joseph Yadgar
Top Level Overview
Work Division
Mir Ziyad Ali
 Sarah Whildin
 Joseph Yadgar
Power
Movement
Light Detection
System Integration
 Chris WallaceHardware Design
Implement Software
 Liron Kopinsky
Software Design
Implement Software

Liron Kopinsky
Liron Kopinsky
Liron Kopinsky
Chris Wallace
FPGA/PCB Interface
 Ribbon
Cables to Headers on the PCB
 Configurable CMOS-CMOS Level
Shifters.
 VCC determines input level
 VDD voltage determines output level
 6 Shifters per package
Chris Wallace
Power Save Mode Hardware
PIC16F688
-Program Memory: 7168 bytes
-RAM: 256 bytes
-Data EEPROM 256 bytes
-Timer(8-bit, 16bit), Interrupts
Chris Wallace
Chris Wallace
User Input and LCD
 Push
buttons on Spartan board to
toggle information on LCD.
 Optrex 16x4 parallel display.
 Uses HD44780 controller chip
 Will use GPIOs for writing to LCD.
Chris Wallace
Parts List
7
- MC14504B CMOS-CMOS level
shifters
 1 – Optrex 16x4 LCD
 1 – Spartan 3 Starter Board
 3 – 40 Pin Headers
 1 – PIC16F688
 1 – IRF640 HEXFET Power MOSFET
Chris Wallace
Power System
PV Cell Output
Charge Controller for
the Solar Panel. It’s
using PWM charging
principle to optimize
battery charging.
Optimized Output
Step down
Signal
Battery Output
Step-Down DCDC Switching
Regulator to
produce 1.5 A,
5V for the FPGA
To Motor
Driver
Three Solar Panels
Connected in series to produce
27 Watts (18V x 1.5A)
12V 27 Ah Deep Cycle
Lead Acid Battery
A/D Conversion for sending
signal to FPGA to know how
much charge left into the
battery
Step down
Signal
A/D Conversion for sending
signal to FPGA to know how
much output Current coming
from the PV Cells
Mir Ziyad Ali
To FPGA
Space Age Solar Panels
Highest Power to Size Ratio
+
-
+
-
+
Charge
Controller
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SPE – 500 Dual Output Panels for 6 & 12 Volt Charging Systems.
Single-crystal silicon super cells used in space satellite
applications. Lightweight and durable design-panels are
encapsulated, temperature and weather resistant.
Three Panels connected in parallel to produce 27 Watts (1.5A,
18V) for the entire system.
Total weight is about 57 oz (3.52 lbs)
Size W" x L" : 12.25" x 26.25"
Mir Ziyad Ali
Charge Controller
L1
C3
1
D1
2
66uH
440uF
0- 18 Vdc
C1
Q1
220uF
MUR820
2
V2
L2
IRF640
C2
333uH
220uF
Load
100
1
TSC427
1
2
3
4
NC
NC
IN A OUT A
GND
Vdd
IN B OUT B
8
7
6
5
V1
12 Vdc
C3
100nF
UC3525A
R6
10k
R3
C6
4.7nF
120
1
2
3
4
5
6
7
8
R2
Inv Input
N.I. Input
Sync
Osc Output
CT
RT
VREF
+Vin
Output B
16
15
14
V1
C4
13
12
11
10
9
Vc
GND
Output A
Dischar ge
Shutdown
Soft- Start Compensator
12 Vdc
100nF
C7
2.8k
C5
C8
1uF
R8
22uF
47nF
796
LF 356
R4
33k
R1
OUT
800k
+
OPAMP
D4
D1N750
Mir Ziyad Ali
Deep Cycle Battery



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
o
o
o
BP28-12 Maintenance - Free
Rechargeable Sealed Lead-Acid
6 cell (in series) Battery.
28 Ah 12V Storage capacity,
which will supply power to our
system for 6 hrs before
recharging it for 18 hours with
1.5A charging current.
20 hour rate F.V.(1.75V/cell)
(1400 mA to 11.50 volts)
Approximate Weight 9600g
(21.17lbs)
Maximum charge current is
8.5A
Dimension (inch)
Length ..........6.89
Width ............6.54
Height............4.92
Mir Ziyad Ali
Switching Regulators

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For all step-down DC-DC voltages, I’ll be using state-of-the-art TI’s
PTN78000W: a series of high-efficiency, step-down Integrated Switching
Regulator (ISR). This ISR will help me to reduce system power loss
significantly contrary to linear voltage regulator that has considerable
loss. It features
1.5-A Output Current
Wide-Input Voltage (7 V to 36 V)
Wide-Output Voltage Adjust (2.5 V to 12.6 V)
High Efficiency (Up to 95%)
On/Off Inhibit
Output Current Limit
Overtemperature Shutdown
Operating Temp: –40°C to 85°C
Mir Ziyad Ali
Parts List
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


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MUR 820 200V 8A TO-220AC Ultrafast POWER Diode
IRF640 HEXFET Power MOSFET 200V 18A
UC3525A PWM Chip 100kHz Pulse
TSC427 MOSFET Gate Driver
LF356 Operational Amplifiers
220 μF [4], 10 μF[4], 1 μF [2], 1 nF [4] Capacitors
Transformers [2] (Inductance is determined)
1N4730 Diode
1k – 800 kΩ range Resistors.
SPE-500 18V, 500mA Solar Panel [3]
BP28-12 Lead Acid Battery
PTN78000W [2] and PT78ST105 [2] Switching Regulators
Mir Ziyad Ali
LED Light Sensors
Joseph Yadgar
8:1 Multiplexer
Joseph Yadgar
Part List
Green LEDs (10)
 ADC0804 Analog to Digital Converter
Chips (10)
 LF356N Op Amp Chips (10)
 MAX308 8-Channel Analog Multiplexers
(8)

Joseph Yadgar
Printed Circuit Board
 Four
layer board
 Everything will be on the PCB except
for the power system.
 We will be mounting the devices
using both surface mounts and DIPs.
 We plan to have our first PCB layout
done in the next week.
Joseph Yadgar
Motor Control System
Overview
 Logic
signals sent from
microprocessor to motor control
system.
 Motors operate inΔV
forward or reverse.
 Shaft encoders detect position
information.
Sarah Whildin
Optoisolator1
IN2
Component_3
?
U
KA3100D
Optoisolator1
9
8
1
1
0
6
1
C
N
C
SGND
N
PGND
7
CE1
IN2
IN1
2
1
5
?
U
OUT4
OUT2
3
1
4
VS2
VS1
Optoisolator1
4
1
3
Step
Motor
OUT3
OUT1
5
1
2
CE2
CE1
6
1
1
Component_4
PGND
Vcc
In1
*
?
U
F
p
0
0
1
M
Cap
?
B
?
C
B
*
VCC
OUT
ENC
Motor Control Schematic
Sarah Whildin
Part List
2 Stepper Motors with shaft encoders –
Model AM23-150-2-ENC from Advanced
Micro Systems, INC.
 2 Motor Drivers – KA3100D from Fairchild
Semiconductor
 6 Optoisolators – Model 6N138
 2 quadrature decoders – Model HCTL –
2032 from Agilent.
 Various Capacitors and Resistors

Sarah Whildin
Questions
OASIS
Mir Ziyad Ali
Liron Kopinsky
Christopher Wallace
Sarah Whildin
Joseph Yadgar