1. a.k.a “THE A.U.M. DEVICE” (PRONOUNCED “OHM”) By B. Löwen Gruseck (EE) Gardy Lacombe (EE) Michael Sriprashad (EE) Sponsored by

2.  To save energy  Energy sustainability  Reduce Phantom Power  Reduce unwanted carbon dioxide emissions  Save money THE A.U.M. DEVICE

4.  Eliminate standby power  Overall device to be energy efficient  Different modes of operations  User controlled onboard  User controlled wirelessly  Accurately calculate power usage THE A.U.M. DEVICE

5.  3 outlets  120V(RMS) AC 60Hz power input and output  Measures 5A, 120V  75% savings on stand by power  5V DC power for internal devices  Calculate power with at most +/- 5% error  At least10 bit wide ADC for power calculations  2 user interface inputs  100m wireless control THE A.U.M. DEVICE

6. Wall (120V AC) Power Supply Power Supply Wireless Communication Wireless Communication Motion Sensor Screen Microcontroller Relay Appliance Device Current Sensor

7. STANDBY POWER SAVED  Pstandby =3*(.08A*120VRMS )= 28.8W  Pa.u.m.s. = (Pstandby/4) + 2.28W = 4.68W  Percent saved = 100% - 4.68W/28.8W = 83% saved! THE A.U.M. DEVICE  Pstandby =3*(.08A*120VRMS )= 28.8W  Pa.u.m.s. = 0W + 2.28W = 2.28W  Percent saved = 100% - 2.28W/28.8W = 92% saved! CUT-OFF POWER SAVED

8. THE A.U.M. DEVICE

10.  Using the hall effect sensors and magnets; the device can sense which pre set outlet is equipped  There are two pre set outlets  The first outlet the device into standby mode  The second outlet sets the device into sleep mode THE A.U.M. DEVICE

11.  Outlets turn off when timer runs out  User specified countdown  Timer overrides Standby Mode  Great for chargers or late nights THE A.U.M. DEVICE

13.  Our project worked with very little problems in the end. The modes worked and the peripheral interfaces communicated effectively with the main device MCU  Power Calculations came out to 0-5% accuracy as desired  Some processes were delayed, due to constant interrupts and polling  Streamlined MCU program and more sophisticated Android App would be ways to improve our design  More compact physical and aesthetic housing design