Slide 1Slide 2Slide 3Slide 5Slide 6Slide 7Slide 8Slide 9Slide 10Slide 11Slide 12Slide 13Slide 14Slide 15Slide 16Slide 17Slide 18Slide 19Slide 20Slide 21Slide 22Slide 23Slide 24Slide 25Power Line9:5910:00Host UnitTarget UnitDesign a more reliable system for controlling lights and other devices.Target UnitLeader: Brian RobertsMembers: Will ParkerWai Yee KwanJason TatumFaculty Advisor: Dr. Nicholas YounanBrian Roberts Jason TatumWai Yee KwanDr. Nicholas Younan Will Parker•Two classes of appliance control systems exist: inexpensive and costly.•Low end = poor reliability and limited accessibility•High end = high cost•Needed: a system that provides high-end features while retaining a low cost.Internet/LANHost ComputerLinks the host unit to the Internet.Host Unit Sends commands to the target units.ApplianceApplianceApplianceTarget UnitReceives and executes commands.Target UnitTarget UnitCarrier Current Modem•Signal attenuation •Power line noisePower Supply•Voltage Regulation•Power Consumption• Signals attenuate when placed on a power line• Signal level at receiver must be > 3 mV• Line will contain noise that must be tolerated• Signal-to-Noise Ratio must be > 15dBLine length (m)Received signal voltageApplied signal = 1.13V @ 71.5 kHz00.20.40.60.811.20 20 40 60 80 100-2.5 -2 -1.5 -1 -0.5 0 0.5 1 1.5 2 2.5x 10-3-0.8-0.6-0.4-0.200.20.40.60.80ms 2.5ms 5.0ms0.2 0.4 0.6 0.8 1 1.2 1.4 1.6 1.8 2x 1050204060801001201401601802.571.5kHz0kHz 200kHz0.2V/divNoiseReceived signal = 7mV RMS SNR = 19.5dBBit error rate is less than the required 0.01%6 6.2 6.4 6.6 6.8 7 7.2 7.4 7.6 7.8 8x 1040510152025306 6.2 6.4 6.6 6.8 7 7.2 7.4 7.6 7.8 8x 10405101520253060kHz 71.5kHz 80kHz60kHz 71.5kHz 80kHzSignalPower supply has toProvide +5V and +10VHave a ripple of less than 0.5VPPUse no more than 3WPower supplies considered:Shunt regulatorSeries regulator012345678910110 0.05 0.1 0.15 0.2 0.25 0.3Time (s)V o lta g e+5V+10V012345678910110 0.05 0.1 0.15 0.2 0.25 0.3Time (s)Voltage+5V+10V00.511.522.533.544.5P ow er Draw n (W )Relay onRelay offShunt RegulatorSeries Regulator0 5 0 10 0 15 0 20 0 25 000. 511. 522. 53x 1 0- 6FCC regulation 15.109: Emissions @ 71.5kHz must be no more 33.6V/m @ 300m0m 125m 250m3µV/m0µV/mLine LengthField StrengthPart Description PriceCOP8 Microcontroller $1.96RS-232 Interface Chip $1.92Clock Module $2.29EEPROM $2.10Modem $7.0910 MHz Quartz Crystal $0.3311.0592 MHz Crystal $0.29120V : 12.6V Transformer $2.10AC Power Cord $0.71Resistors, caps, etc. $3.00Enclosure $2.50Circuit Board $2.50Total: $26.78Maximum allowed component cost for host unit is $35.00.Total is 23% less than requirement.Part Description PriceCOP8 Microcontroller $1.78Modem $7.0910 MHz Quartz Crystal $0.3311.0592 MHz Crystal $0.293-Conductor Pwr Cord $1.70Resistors, caps, etc. $3.50Circuit Board $2.50Enclosure $2.50Total: $19.69Maximum allowed component cost for target unit is $30.00.Total is 34% less than requirement.SignalAttenuationLineNoiseVoltageRegulationPowerConsumptionFCCComplianceCostRequired signal = 3mVSignal @ 100m = 200mVRequired voltages = 5V & 10V ± 10%Max. allowed ripple = 0.5V Simulated voltages = 5.2V & 10.2VSimulated ripple = 100mVRequired max = 3WSimulated max = 2.6WMonthly cost = $0.22Max. allowed field strength = 33.6 µV/mSimulated field strength = 3 µV/mMax. cost for host unit = $35.00Actual cost for host unit = $26.91 Max. cost for target unit = $30.00Actual cost for target unit = $19.69Required SNR = 15dBSimulated SNR = 19.5dB• 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.Dr. Nicolas YounanDr. Joseph PiconeDr. Randy FollettA. 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