1. Team 10 Jared Huffman, Brianna Bultema, Achyut Shrestha, and Christopher Michaels

2. Introduction and Outline Project Summary Project Summary Design Status Design Status Conclusion Conclusion

3. Project Summary A Brief Overview A Brief Overview Task Breakdown Task Breakdown Purpose of a Microbial Fuel Cell Purpose of a Microbial Fuel Cell Power Management Power Management Feeding Feeding Power Generation Power Generation How a Biobattery Works How a Biobattery Works Project Summary Design StatusPlanning Conclusion

4. Project Summary Schematic courtesy of Derek R. Lovely (Microbial Energizers: Fuel Cells the Keep Going?) Project Summary Design StatusConclusion

5. Design Norms Stewardship Stewardship Reduce the usage of corrosive chemicals Reduce the usage of corrosive chemicals Trust Trust Dependable, Reliable Dependable, Reliable Justice Justice Rights of Non-Users Rights of Non-Users Project Summary Design StatusConclusion

6. Design Case Design Case Design Must be less than 30lbs. and small Must be less than 30lbs. and small Considering using an Air Cathode design to reduce weight from 65 lbs. for greater portability Considering using an Air Cathode design to reduce weight from 65 lbs. for greater portability Have consulted Professor Hozalski at Professor Wonder’s recommendation Have consulted Professor Hozalski at Professor Wonder’s recommendation Project Summary Project Summary Design StatusConclusion

7. Design Fuel cell arrangement and composition Fuel cell arrangement and composition Will use a combination of serial and parallel circuit design Will use a combination of serial and parallel circuit design Lower chance of battery and circuit failure Lower chance of battery and circuit failure Will use Geobacter Metallireducens Will use Geobacter Metallireducens Will use aerobic bacteria for protection against air Will use aerobic bacteria for protection against air Close proximity Graphite Mesh for electrode Close proximity Graphite Mesh for electrode Cellophane membrane Cellophane membrane Project Summary Project Summary Design StatusConclusion

8. Design Feeding Feeding Project Summary Project Summary Design StatusConclusion

9. Design Power Management Power Management Monitoring Monitoring Must alert user of excessive current draw and feeding times Must alert user of excessive current draw and feeding times Must alert user of cell and circuit failure Must alert user of cell and circuit failure Planning to use an ADC, microprocessor, and LCD Planning to use an ADC, microprocessor, and LCD Project Summary Project Summary Design StatusConclusion

10. Design More Power Management More Power Management Regulation Regulation Must output 4.75V-5.25V and 100mA-500mA for USB compatibility Must output 4.75V-5.25V and 100mA-500mA for USB compatibility Must overcome low current problem Must overcome low current problem Will use the 61000 series regulating chip design from Texas Instruments Will use the 61000 series regulating chip design from Texas Instruments Must step up voltage to about 5V from about 3.3V Must step up voltage to about 5V from about 3.3V Project Summary Design StatusConclusion

11. Testing and Prototyping Have constructed an experimental case with the desired membrane Have constructed an experimental case with the desired membrane Testing still in progress Testing still in progress Nafion membrane second choice Nafion membrane second choice Have electrical design almost finalized Have electrical design almost finalized Will need to test it in lab due to inability to test via computer simulation Will need to test it in lab due to inability to test via computer simulation Project Summary Project Summary Design StatusConclusion

12. Current Schedule and Expenses No changes in plans for expenses No changes in plans for expenses Have spent $10 on parts to test membranes Have spent $10 on parts to test membranes Are on schedule Are on schedule Will have design and testing completed by March 17 Will have design and testing completed by March 17 Will have presentation ready for industrial consultant on March 19 Will have presentation ready for industrial consultant on March 19 Project Summary Project Summary Design StatusConclusion

13. Conclusion Are meeting design norms Are meeting design norms Progressing on all parts of the design Progressing on all parts of the design Making progress on testing Making progress on testing Need to finalize some portions of the design Need to finalize some portions of the design On schedule and within budget On schedule and within budget Project Summary Project Summary Design StatusPlanning Conclusion

14. Questions and Comments