1. Introduction to Electrical & Computer Engineering Circuit Representation 1 Dr. Cynthia Furse University of Utah

2. Introduction to Electrical Engineering Circuit Representation Voltage, Current, Resistance Ground / Reference / Neutral Variable Resistors / Resistive Sensors Measuring V,I,R Series & Parallel elements Node, Path, Loop 2

3. V DC V + - V - + - V I I I Voltage (DC)

4. V ref(erence) = 0V = ground V ref(erence) = 0V = ground Ground / Reference / Neutral

5. + - V V AC ̴ V + Voltage (AC)

6. R (Ω) Resistor

7. R (Ω) Variable Resistor / Resistive Sensor

8. Resistance Standard Resistor Values Variable resistor a)Potentiometer: 3-terminal variable resistor. Rheostat: 2-terminal variable resistor Resistive Sensor – Temperature – Thermister – Pressure – Piezoresistor – Light intensity – Light-dependent R (LDR) 8

9. + - VΩ com A + - + - V DC V AC RMS ̴ DVM DC voltmeter AC (RMS) voltmeter Measuring Voltage (Voltmeter) DVM = Digital VoltMeter

10. VΩ com A Ω Ohm meter Measuring Resistance (Ohmeter)

11. + - VΩ com A + - + - ̴ I DC I AC RMS DC ammeter AC RMS ammeter Measuring Current (Ammeter)

12. Circuit Representation All rights reserved. Reproduced with permission © 2016 National Technology and Science Press

13. Common Circuit Elements All rights reserved. Reproduced with Permission © 2016 National Technology and Science Press

14. Circuit Topology Branch: single element, such as a resistor or source Node: connection point between two or more branches Extraordinary Node: connection point between at least 3 branches Loop: closed path in a circuit node branch loop All rights reserved. Reproduced with Permission. © 2016 National Technology and Science Press

15. Terminology All rights reserved. Do not reproduce or distribute. © 2016 National Technology and Science Press

16. Circuit Diagram 16 Picture From: Wikipedia

17. Series & Parallel 17

18. Series: CURRENT is the same 18

19. Parallel: VOLTAGE is the same 19

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21. Wheatstone Bridge Tune Rv until V= 0 Ru = (R2/R1) Rv 21 V

22. Series / Parallel Battery Charging http://batterytender.com/resources/connecti ng-batteries-chargers.htm 22

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30. Conclusion: Circuit Representation 30 Voltage, Current, Resistance Variable Resistors / Resistive Sensors Measuring V,I,R Series & Parallel elements Node, Path, loop

31. Introduction to Electrical & Computer Engineering Circuit Representation 31 Dr. Cynthia Furse University of Utah Peekaboo Slot Canyon Near Kanab, Utah

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