Senior Design I: Dr. Randolph Follett Spencer Gass John Barr Grant Patrick Abbey Personal Power Consumption Analyst

John Barr, EE Website Updates Hardware » High Voltage Application Spencer Gass, EE (Team Lead) Website Design Software Application » Bluetooth/Mobile Application Grant Abbey, EE Software Application Hardware » Hardware Communication

Associate Professor » Ph.D., Electrical Engineering, Energy Systems, University of Toronto, Canada, 2004 Academic/Research and Fields of Interest: » Phase-locked loop and nonlinear filtering techniques for power engineering applications » Optimal/Robust/Nonlinear controls for distributed and renewable energy systems, and hybrid renewable energy systems » Phasor measurement for wide area applications » Power quality measurement and enhancement » Estimation of power system variables/parameters » Power system stability, protection and control

» Problem » Solution Overview » Design Constraints ˃Technical/Practical Constraints » Solution Details ˃Sensing ˃Communications/Processing ˃Mobile Application » Progress » Work Plan Schedule

» Electricity usage is expensive. » However, many people are unaware of exactly how much power is used by any given device in their home. » Is there a way to measure how much power is consumed by any household device?

» Current market solutions ˃Instantaneous measurements ˃Displays on meter itself » SmartMeter focuses more on Power Trend Analysis rather than a simple instantaneous value. ˃ Informative software interfaces ˃Consumption during operation, sleep, hibernation, and wake-up cycles ˃Graphs of consumption over time (hours, days, weeks)

ConstraintDescription Current RatingThe product must be able to supply an amount equal to or greater than an average 110V or 220V plug can supply - 20A, 40A, respectively. AccuracyPower measurement data should be accurate within ±5%. Sampling RateMeasurements are sampled at a minimum of 3,900 samples per second. Data Storage SpaceThe product must have onboard storage space sufficient for 24 hours of data storage in case of lost connection with the appliance. Transmission RangeTransmission of data to the interfacing device should be possible over 32 feet (9.75m) assuming standard household furniture in the line of sight.

LOAD Home Outlet (120VAC) Current Sensing Power Measurement Processing (Microcontroller) Mobile App (QT) Voltage Scaling Sensing SPI Communication Bluetooth Module UART Communication Wireless Relay to Application

Processing (PIC24) Bluetooth Module UART Communication

Mobile App (QT) Wireless Relay to Application [5]

SectionComponentAcquiredTestingConfirmedIntegrated Hardware Current Sensor Power Measurement IC Voltage Scaling Network Microprocessor Bluetooth Module Software SPI Communication UART Interfacing Mobile Application

AugustSeptemberOctoberNovember Research - All Part Selection - All Circuit Design – Grant, John Software – Spencer, Grant System Integration - All Testing – All

» [1] Allegro Microsystems, “Fully Integrated, Hall Effect-Based Linear Current Sensor IC with 2.1kVRMS Isolation and a Low- Resistance Current Conductor,” ACS712 datasheet, 2006 [Revised Nov. 2012]. » [2] ST Microelectronics, “Programmable single phase energy metering IC with tamper detection,” STPM01 datasheet, Jun [Revised Jun. 2011]. » [3] Microchip Technology, “PIC24HJ32GP202/204 and PIC24HJ16GP304 Data Sheet,” PIC24 datasheet, May 2007 [Revised Aug. 2007]. » [4] "RN-42 Datasheet" [Online]. Available: [Accessed October 16, 2015]. » [5] SparkFun Bluetooth Modem - BlueSMiRF Silver”[Online]. Available: