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ENGS2613 Intro Electrical Science Week 6 Dr. George Scheets Read 4.9 – 4.12 Problems 4.26, 47, 61, 64, 65, & 79 Exam 1 Results Hi = 100, Low = 23, Ave = 67.40, Deviation = 15.82 A > 89, B > 75, C > 61, D > 46 50 Minute Design on Friday Open Book, Notes, & Team Mate(s) 2 or 3 person teams Closed Open Collaboration with Other Teams Listening In is OK (= Corporate Espionage) Calculator OK Smart Phones NOT OK Assigned Seating Example:Mini-Design Specifications: Input Current Value Desired Output Voltage R1 R2 Need 12.38 Ω resistors? Use it. Resistors available: 1, 2, …, 9; x1, x10, x100, x1000 etc Resistor Wattage Ratings available: 0.1, 1, 10, 100, 1K, etc. ↑ Revise for manufacture (Need Circuit Diagram w/Wattages) Vout = 7.4 V 0.017 A Specify R1 & R2 Exactly Your Design Must be > wattage absorbed, else resistors will fry. Price Design: $ Cost per resistor = Wattage Rating Calculate Vout using Design for Manufacture (Vman) Calculate Figure of Merit [1 + 9|Vman-7.4|](Σ $Resistors )1.3 Extra Credit for 5 Working Designs w/Lowest FoM Per Version (4 Versions) Thevenin Equivalent Circuits Any 2 terminal resistive circuit…. Can be replaced with … Fancy Circuit with Resistors & Voltage and/or Current sources + Vth Anything attached to 2 output leads will see same voltage & current Rth