UNIVERSITY OF NEBRASKA – LINCOLN COLLEGE OF ENGINEERING

Circuit Components

Batteries, Resistors, Capacitors,

Computer and Electronics Engineering Department

UNIVERSITY OF NEBRASKA – LINCOLN

Circuit Parameters

COLLEGE OF ENGINEERING • • • Current – Flow of electrons Voltage – Potential which makes current flow in a conductor Resistance (Impedance) – Property which impedes the flow of current Computer and Electronics Engineering Department

UNIVERSITY OF NEBRASKA – LINCOLN

Circuit Parameters

COLLEGE OF ENGINEERING • Current – Flow of electrons • Electron 1.6*10 -19 coulombs – Units: Ampere – Ampere = 1 coulomb/second • 6.25 *10 18 electrons/second – Symbols & abbreviations • Amps, I Computer and Electronics Engineering Department

UNIVERSITY OF NEBRASKA – LINCOLN

Circuit Parameters

COLLEGE OF ENGINEERING • Voltage – Electromotive Force (EMF) – Potential difference between two points – Units: Volts – Makes current flow through conductors – Symbols & abbreviations • V E Computer and Electronics Engineering Department

UNIVERSITY OF NEBRASKA – LINCOLN

Circuit Parameters

COLLEGE OF ENGINEERING • Resistance – Property which impedes the flow of current – Units: Ohms – Ohm = 1 Volt / 1 Ampere – Symbol: Ω Computer and Electronics Engineering Department

UNIVERSITY OF NEBRASKA – LINCOLN

Circuit Parameters

COLLEGE OF ENGINEERING Resistors 12V 6Ω Circuit with Battery and Resistor Printed Circuit Sized Resistors Ohm’s Law: I = V/R Computer and Electronics Engineering Department

UNIVERSITY OF NEBRASKA – LINCOLN

Resistors

COLLEGE OF ENGINEERING Color Black Brown Red Orange Yellow Green Blue Violet Gray White Value 0 1 2 3 4 5 6 7 8 9 Two digits plus multiplier AB*10 C Yellow – Violet – Red 47*10 2 4700 Ω Brown – Black – Orange 10*10 3 10,000 Ω Computer and Electronics Engineering Department

UNIVERSITY OF NEBRASKA – LINCOLN

Resistors

COLLEGE OF ENGINEERING Tolerance Gold +/-5% Silver +/-10% None +/-20% Computer and Electronics Engineering Department

UNIVERSITY OF NEBRASKA – LINCOLN

Resistors

COLLEGE OF ENGINEERING

20 22 24 27 30 10 11 12 13 15 16 18

Available in +/-5%

62 68 75 82 91 33 36 39 43 47 51 56

Available in +/-10% Range of values is from 0.10 Ω To 22.0 x10 6

10 12 15 18 22 27

Ω Computer and Electronics Engineering Department

33 39 47 56 68 82

UNIVERSITY OF NEBRASKA – LINCOLN

Circuit Parameters

COLLEGE OF ENGINEERING

Capacitors

C= Charge/Voltage = Q/V Units: Farad Smooths changes in voltage Computer and Electronics Engineering Department

UNIVERSITY OF NEBRASKA – LINCOLN

Circuit Parameters

COLLEGE OF ENGINEERING Typical Resistor-Capacitor Circuit Computer and Electronics Engineering Department