1. Team Gong FDR SDP10 1 /13 Final Design Review Team Gong: Jason Dodge Eric Every Andrew Hills Alan R Levin F.R.I.D.G.E.

2. Team Gong FDR SDP10 2 /13 Outline  Review of Project  Final Design  Demonstration  Conclusions and Future Work

3. Team Gong FDR SDP10 3 /13 Review  Goal Increase frequency to 60Hz by reducing load on grid Implement a system that can adjust duty cycle on appliances based on user preferences and utility input.

4. Team Gong FDR SDP10 4 /13 Review Continued  Appliance Node Wired Communication Switch and thermometer retrofitted to refrigerator Voltage, Current, Frequency, and Energy measurements  Customer Server Software Receives and sends messages to and from Appliance Node  Utility Server Software Sends requests to Customer Control Software Collects information from Customer Server Software

5. Team Gong FDR SDP10 5 /13 Block Diagram

6. Team Gong FDR SDP10 6 /13 Multimeter  Ammeter CSLA2CD Hall Effect Current Transformer 36.5 mV step size  Voltmeter Hammond Manufacturing 161 Transformer 120VAC to 7VAC Voltage Divider 7VAC to 0.5VAC  Metering IC ADE7753 RMS-to-DC Zero Crossing Frequency Detection

7. Team Gong FDR SDP10 7 /13 Multimeter Schematic

8. Team Gong FDR SDP10 8 /13 Switching  Binary Switching with Thyristors (SCR)  Photo Triac Driver  Zero Voltage Triggering circuit  Handles Inductive Loads

9. Team Gong FDR SDP10 9 /13 Thermometer  K- Type Thermocouple  Thermal IC AD595 Thermocouple Amp 10mV/ o C -141 to 349 o C Adjustable freezing point

10. Team Gong FDR SDP10 10 /13 Thermometer Schematic

11. Team Gong FDR SDP10 11 /13 Microcontroller  Scaled down to 32KB / 1 UART from 128KB / 4 UART  Stayed with Arduino platform for code reuse  Shared SPI bus for communication Modified Ethernet libraries Integrated ADE7753 communication libraries

12. Team Gong FDR SDP10 12 /13 Demo  Representation of System Fan represents inductive cooling element Light bulb represents heat  When temperature rises, fan turns on  When temperature falls, fan turns off  Temperatures adjustable through GUI

13. Team Gong FDR SDP10 13 /13 Conclusions and Future Work  Conclusions Improved debugging techniques Check integrity of lab equipment Better understanding of Digital/Analog interaction Take into consideration shipping time Don't assume something works until it works Respect for AC voltage  Future Work Low-Power Optimization Measure Power Factor More Advanced Software Control Scheme