the team formerly known as nrel 2 ryan manning eric simley arvind talukdar
Post on 19-Dec-2015
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TRANSCRIPT
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The Team Formerly Known as NREL 2
Ryan ManningEric Simley
Arvind Talukdar
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Presentation Outline
Solar Tracker/DE2 Development Project Brief overview: Original Goals, Modified Goals System block diagram: Highlighting project
essentials System Specifications (schematics… etc.) Software Descriptions Division of Responsibility Parts List: Obtained, not obtained Schedule
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Recap
The ProblemOur Solution Original Project Goals Complete low-cost solar tracking system with
monitor (VGA) and keyboard (USB) setup.
Modified Project Goals Focus on essential areas: I/O, LCD, A/D,
multiplexing system, stepper motor apparatus.
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System Block Diagram
Altera DE2 BoardStepper Motors/
MechanicalApparatus
Monitor/Interface Photodetectors
Keyboard
Solar Panel/Battery
Apparatus
MouseUSB
USB
VGA
I/O
I/O
I/O
Non-Essential
Essential
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Photodetector Circuit
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VGA Schematic
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VGA Timing
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Photovoltaic Cell Circuit
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I/O Schematic
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Software
Photodetector Inputs
Read
Store
CycleMux Ctrl
Data Input
Compare Inputs Max @ 90°?
No
Yes
Motor Ctrl according to photodetecto
rs
Motor Ctrl according to
PV power
Solar Panel Input
Power Optimized?
No
Done. Now sleep
Yes
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Stepper Motor Circuit
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Driver Circuit Specifications
Motor runs at 2.8A/step4-Lead Bipolar Stepper MotorSupply voltage 12-42 VLevel shifter for input to PWM and DIRSign Magnitude PWM
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Division of Tasks
Stepper Motor Mechanical Apparatus – EveryoneA/D and Multiplexing circuit – EricStepper Motor Driver Circuit and Control – ArvindPV Cell Power Management – RyanI/O pin logic – Complete (Ryan)Monitor interface – EricKeyboard interface – RyanAlgorithm Development – Eric and Arvind…and Ryan
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Bill of MaterialsItem Quantity Price ObtainedAltera DE2 Core 2 $0.00 $0Solar Panel 1 $0.00 $0Phototransistor 25 $75.00 $12.00Stepper Motor 2 $60.00 $60.00Mux 3 $30.00 $20.00LMD18200 2 $22.00 $22.00AD9215 2 $22.00 $22.00Level Shifter 1 $0.85 $0.00Breadboard 1 $40.00 $40.00Halogen Lamp 1 $21.00 $21.00Misc. (Apparatus) Several $100 $0.00
$370.85 $197Budget $1,000
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Milestone 1 3/20
Functional Stepper Motor Circuit Control motor position using software
Functional Photodetector Circuit Switch between multiple
photodetector outputs
Functional PV Cell Power Circuit Monitor instantaneous Power Output Charge 12V Battery
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Milestone 2 4/17
Keyboard Input VGA OutputFinal PV Cell/Stepper Motor Hardware Complete
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Schedule
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Questions