Current Lecture - EG 10111\/10112 Reminders Introduction to Engineering Homework 4 due next week(keep a copy Need to use the on-line solution to study

Current Lecture - EG 10111/10112 Reminders Introduction to...

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9/23/20111EG 10111/10112Introduction to EngineeringSensors andProject DetailsCopyright © 2009University of Notre DameUniversity of Notre DameLecture Contributors: Victoria Goodrich and Glen NieburRemindersHomework 4 due next week… (keep a copy)– Need to use the on-line solution to study for the exam– Spend your time working on your project!Ntk iLiCtEG 10111/10112Introduction to EngineeringCopyright © 2009University of Notre DameNext week in Learning Center– No LC activity– Meet with your LC instructor to discuss demonstration plans EG 101112Your Project DemonstrationThe room is yours throughout your demonstration!– Demo must be complete in 8 minutesFeel free to use “props” for your demonstration– To simulate the appropriate environmentEG 10111/10112Introduction to EngineeringCopyright © 2009University of Notre DameYou will need to show your state transition diagram on the overhead so that we can see what “should happen”EG 101113Review from last lecture and LCCombining resistors in seriesVoltage divider conceptEG 10111/10112Introduction to EngineeringCopyright © 2009University of Notre DameCircuit analysisSensors as resistorsEG 101114Series ResistancesRVsR12RtotalIsEG 10111/10112Introduction to EngineeringCopyright © 2009University of Notre DameAdding series resistors: Rtotal= R1+ R2,which is larger than either R1 or R2.(This concept can be extrapolated to 3, 4, …. n resistors in series)This is also called an Equivalent Resistance (Req)Combining Resistorsn1n2n0• Recall:Vs = (R1 + R2)Is[4]EG 10111/10112Introduction to EngineeringCopyright © 2009University of Notre Dame6When resistors are placed ‘back to back’ (in “series”), the “equivalent” resistance is the sum for the resistancesReq= R1+ R2 (Vs= ReqIs)
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9/23/20112“Redrawing” Circuits•We often need to “Redraw” Circuits to make Analysis easier…•An example:What is Is?R1Is= 10 EG 10111/10112Introduction to EngineeringCopyright © 2009University of Notre Dame7EG 10111VS= 5 VR2= 20 “Redrawing” Circuits•We often need to “Redraw” Circuits to make Analysis easier…•An example: What is Is?IsOriginal CircuitRedrawn CircuitOhm’s LawVVRIVTotals5EG 10111/10112Introduction to EngineeringCopyright © 2009University of Notre Dame8EG 10111R5 VR12= 10 = 20 Rtotal=305 VAIVRVIsTotals167.0305The Voltage DividerVs+-V1V2R1R2One loop with KVL: going up the left side has to equal going down the right side.EG 10111/10112Introduction to EngineeringCopyright © 2009University of Notre DameSuppose you know Vsand R1and R2.Then what are V1and V2– i.e., how is Vs“divided” between the two resistors?
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