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Leader: Will Parker Members: Brian Roberts Wai Yee Kwan Jason Tatum Faculty Advisor: Dr. Nicholas Younan

Brian Roberts FCC Certification Hardware Testing. Wai Yee Kwan Web Page Design Hardware Testing. Will Parker Hardware Design Microcontroller Firmware. Jason Tatum Computer Software Data Communication Testing. Dr. Nicholas Younan. Team Members. Leader: Will Parker

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Leader: Will Parker Members: Brian Roberts Wai Yee Kwan Jason Tatum Faculty Advisor: Dr. Nicholas Younan

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  1. Brian Roberts FCC Certification Hardware Testing Wai Yee Kwan Web Page Design Hardware Testing Will Parker Hardware Design Microcontroller Firmware Jason Tatum Computer Software Data Communication Testing Dr. Nicholas Younan Team Members Leader: Will Parker Members: Brian Roberts Wai Yee Kwan Jason Tatum Faculty Advisor: Dr. Nicholas Younan

  2. Target Unit Target Unit Abstract Design a more reliable system for controlling lights and other devices. Power Line Host Unit 10:00 9:59

  3. Internet/ LAN Host Computer Programs host unit and links the host unit to the Internet. Host Unit Sends commands to the target units. Target Unit Appliance Receives and executes commands. Target Unit Appliance Target Unit Appliance

  4. Max. allowed field strength @ 300m = 33.6 µV/m Max. cost for host unit = $35.00 Max. cost for target unit = $30.00 Required signal = 3mV Required average = 3W Monthly cost = $0.22 Required Bit Error Rate < 0.01% Required voltages = 5V & 10V ± 10% Max. allowed ripple = 0.5V Test Specifications Line Noise Voltage Regulation Signal Attenuation FCC Compliance Cost Power Consumption

  5. Signal Attenuation • Carrier signal was placed onto the power line • Signal strength was measured for different outlets • Capacitor values were adjusted for maximum performance • Isolation transformer on host unit was determined to be attenuating the signal

  6. Signal Attenuation Received signal voltage Line length (m) Required signal for signal detection= 3mV

  7. Bit Error Rate • For simulation, noise on power line was recorded, and SNR was computed • Bit error rate was measured by transferring data and comparing it to the original • Capacitor values were adjusted for maximum performance • Isolation transformer on host unit was determined to be distorting the signal

  8. Bit Error Rate Bit error rate from simulation < 0.01% Measured Bit Error Rate

  9. Voltage Regulation • A digital storage oscilloscope was used to record the voltage levels at the +5V and +10V supplies • Results were checked to confirm supply voltages were within ±10% of +5V and +10V • Results were checked to confirm ripple was less than 0.5V

  10. Voltage Regulation Measured voltages 5.05V and 10.05V Maximum Measured ripple 0.424V Simulated voltages = 5.2V & 10.2V Simulated ripple = 100mV

  11. Voltage Regulation Measured voltages 5.05V and 9.91V Maximum Measured ripple 0.464V

  12. Power Consumption • Shunt and series regulators were simulated • Series regulator was chosen for lower power consumption • Actual power consumption was measured • Voltage and current were simultaneously displayed on oscilloscope to determine power factor

  13. Power Consumption Measured Data Power Factor  1

  14. Emissions • FCC regulation 15.109 requires field strengths to be less then 33.6V/m at 300m • Emissions emitted from power line due to the signal from the host unit was measured using equipment in the communications lab

  15. Emissions Simulated Field Strength @ 300m = 13.90nV/m Measured Field Strength @ 300m = 0.1747nV/m

  16. Host Unit Cost Maximum allowed component cost for host unit is $35.00. Total is 23% less than requirement.

  17. Target Unit Cost Maximum allowed component cost for target unit is $30.00. Total is 34% less than requirement.

  18. Max. allowed field strength @ 300m = 33.6µV/m Simulated field strength @ 300m = 13.9nV/m Measured field strength @300m = 0.175nV/m Max. cost for host unit = $35.00 Actual cost for host unit = $26.91 Max. cost for target unit = $30.00 Actual cost for target unit = $19.69 Required signal = 3mV Simulated Signal @ 300m = 77.6mV Measured Signal @ 300m = 33.8mV Required average = 3W Simulated average = 1.08W Measured average = 1.28W Monthly cost = $0.09 Required voltages = 5V & 10V ± 10% Max. allowed ripple = 0.5V Simulated voltages = 5.2V & 10.2V Simulated ripple = 100mV Worst Case Measured Voltages = 5.05V & 9.91V Max. Measured Ripple = 0.464V Required Bit Error Rate < 0.01% Simulated Bit Error Rate < 0.01% Measured Bit Error Rate = 0.005% Summary Line Noise Voltage Regulation Signal Attenuation FCC Compliance Cost Power Consumption

  19. Future Improvements • Control a wider variety of devices. • Allow sensors to be present in target units. • Integrate existing automation standards such as X-10 and CeBUS into the system.

  20. Host Unit

  21. Target Unit

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