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Jake Baldwin Krista Hasling Maryam Moghaddam-Zadeh Jack Oakes Scott Wisdom

Jake Baldwin Krista Hasling Maryam Moghaddam-Zadeh Jack Oakes Scott Wisdom. Manna Energy Foundation. Manna Energy Foundation. Founded by NASA Engineers, and the Engineers Without Borders (Originated from CU) Surface water treatment Focus on drinking water needs

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Jake Baldwin Krista Hasling Maryam Moghaddam-Zadeh Jack Oakes Scott Wisdom

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  1. Jake Baldwin Krista Hasling Maryam Moghaddam-Zadeh Jack Oakes Scott Wisdom

  2. Manna Energy Foundation

  3. Manna Energy Foundation • Founded by NASA Engineers, and the Engineers Without Borders (Originated from CU) • Surface water treatment • Focus on drinking water needs • Contracted for water purification • 500 secondary schools (High School)

  4. Rwanda

  5. Project Objective • Provide electrical design and prototype construction for Manna Energy’s water purification systems • Features Include • Control Servos, Relays, Sensors, and Data Logging • On-site and Remote Access • Expandable and Flexible

  6. System Overview

  7. System Block Diagram

  8. Power Sensors/ Relays Primary MCU Memory Cellular Base station Board Layout Jack Oakes X X X X Scott Wisdom X X X X Krista Hasling X X X X Maryam Moghaddam-zadeh X X X X Jake Baldwin X X X X Division of Labor

  9. System Block Diagram

  10. Power • System currently has a commercial product which performs peak power tracking on the PV array and outputs 12V DC • Commercial inverter provides 240V AC at 50Hz • Need to provide 3.3V, 5V, 10V, and 12V DC via switching power converters

  11. Power Considerations • Provide 4 regulated DC supply voltages • Components • LM3100- buck converters • LM25005- buck boost converters • Requires a simple feedback loop to regulate voltage level • Special layout consideration will be needed to keep the high frequency switching away from sensitive analog components

  12. System Block Diagram

  13. Sensors ADC Pressure Meter 5 Vdc Flow Meter 5 Vdc UV light 1 240 Vac MC UV light 2 240 Vac Valve 12 Vdc Temperature Sensor

  14. Sensors and Relays • Sensor Model Numbers • Pressure Meter- Omega PX209 • Flow Meter- Signet 2551 • UV light- Sterilight SP100-HO and Sterilight SC1 • Uses Platinum SPC-ICE-HO Controller (with Relay) • Valve- DynaQuip EHH2 • Temperature Sensor

  15. System Block Diagram

  16. Primary Microcontroller • Atmel ATxmega64A1, 8-bit AVR • 78 I/O pins, 16 12-bit ADCs • 8-channel DMA and Event Handler features uniquely suited to real-time monitor/control needs • Facilitates communication between • sub-modules • Real-time response to system • conditions Image source: http://www.atmel.com/products/avr/images/xmega.jpg

  17. Memory • FAT32-formatted SD Card for main data storage • Removable in case of module failure • SRAM on processor stores sampled data from ADCs • Use DMA to off-load work from processor

  18. 3.3 Vdc Primary MCU I/O Pins ADC Relays and Control Sensors On-board ADCs SPI USART/USB GSM Module Add’l Sensors SD Card

  19. System Block Diagram

  20. GSM Cellular • GSM network • Manna’s preferred access method • SparkFun to the rescue • GSM AVR/PIC 900/1800/1900Mhz • Pre-Paid SIM card • Text data exchange

  21. FBD: GSM Module Serial Interface Serial Interface SIM300D FTDI SERIAL-USB AVR/PIC 2 PIN Power USB PORT EXT I/O USB Cable COM-PORT Emulation I2C or SPI Laptop 12Volt DC Main Processor External Components

  22. System Block Diagram

  23. BaseStation

  24. Base Station • DAQ Factory monitors and manipulates data graphically

  25. User Interface Status updates sent periodically Received data is logged and presented on graphs • Various buttons, channels, etc. • AT style commands to communicate with the ports

  26. DAQ Factory • Data acquisition and logging • Custom screens • Graphing/trending • 44 screen components • Sequences and automation • Email alerts • Serial/USB communication

  27. Logistics and Administration • Timeline/schedule……………......Krista • SVN, CVS…………………………Scott & Jack • Budget…………………………….Jack • Requirements…………………….Jake               -Achieving goals               -Making milestones • Documents……………………….Maryam & Scott • Testing…………………………….Everyone

  28. Budget

  29. Goals - Minimum • Ruggedized • Transportation to site • Harsh African environment • Protection against water • Monitor sensors • Autonomous control algorithm • Log, store, and retrieve data • Generate alerts and status updates • 2-way link to a base station via USB or GSM • Respond to commands from base-station on-site • Reprogram control algorithm on-site

  30. Goals – Optimal and Additional • Expandable by non-EEs • Manufacturability • Design system to be modular, support more I/O • Respond to commands and reprogram control algorithm off-site • Download data off-site using GSM link • Directly monitor water quality

  31. Schedule

  32. Risks! • Antenna inside metal box • Cell network in Rwanda • Only use on-site interface • New and unfamiliar architecture • FAT32 • ATxmega • Timeline for testing sensor interface • Temperature tolerance • Add temperature sensors and/or cooling

  33. Questions?

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