a.k.a “ the a.u.m. device” (pronounced “ohm”)
DESCRIPTION
a.k.a “ THE A.U.M. DEVICE” (PRONOUNCED “OHM”). By B. Löwen Gruseck (EE) Gardy Lacombe (EE) Michael Sriprashad (EE). Sponsored by . To save energy Energy sustainability Reduce Phantom Power Reduce unwanted carbon dioxide emissions Save money. Eliminate standby power - PowerPoint PPT PresentationTRANSCRIPT
a.k.a “THE A.U.M. DEVICE”(PRONOUNCED “OHM”)
ByB. Löwen Gruseck (EE)Gardy Lacombe (EE)Michael Sriprashad (EE)
Sponsored by
To save energy Energy sustainability Reduce Phantom Power Reduce unwanted carbon dioxide
emissions Save money
THE A.U.M. DEVICE
THE A.U.M. DEVICE
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
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
THE A.U.M. DEVICE
Wall (120V AC)
Power Supply
Wireless
Communication
Motion SensorScreen
Microcontroller
RelayAppliance Device
Current Sensor
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
THE A.U.M. DEVICE
THE A.U.M. DEVICE
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
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
THE A.U.M. DEVICE
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