Instrumental Analysis Electrical Components and Circuits.

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Transcript of Instrumental Analysis Electrical Components and Circuits.

Instrumental Analysis

Electrical Components and Circuits

Laws of Electricity

RVRIP

IVP

IRV

/

LawPower

zero is loop closed ain voltagesof Sum

zero iscircuit ain point any at currents of Sum

LawsKirchhoff'

Law sOhm'

22

Component SymbolsPower sources (V) and common connections (GND)

Electronic ComponentsResistors

A Resistor Value is determined by its color band and is measured in ohms

First Ring is unitsSecond Ring is TenThird Ring is number of zero’sFourth Ring is tolerance

First RingBlack = 0Brown = 1Red = 2Orange = 3Yellow = 4Green = 5Blue = 6Violet = 7Gray = 8White = 9

Third Ring MultiplierSilver = X .01Gold = X .1Black = X 1Brown = X 10Red = 2 = X 100Orange = 3 = X 1000Yellow = 4 = X 10,000Green = 5 = X 100,000Blue = 6 = X 1000,000Violet = 7 = X 10,000,000

Resistor Color Rings

Resistor Color Code Values

Second RingBlack = 0Brown = 1Red = 2Orange = 3Yellow = 4Green = 5Blue = 6Violet = 7Gray = 8White = 9

1m12m Pg 7

Direct CurrentSeries Circuit I

Ohm’s Law

Kirchhoff’s Laws

Variable Voltage Divider

Potentiometers / Variable Resistors

Component SymbolsInductors (L) and Transformers (T)

simpleinductors

transformersThe two parallel lines indicate that the inductor is wound on a core of iron, iron powder, or ferrite material.

adjustableadjustable tapped

Symbols

PotentiometerVariableResistor

Power SupplyOutputs Volts

BatteriesIn volts

CapacitorsIn Farads

ResistorIn Ohms

Inductor or CoilIn henries

Electronic Components

TransformerInput voltage

120VAC In

DC voltsOut

+

SpeakerInput voltage

MicrophoneOutputs voltage+

StepDown

StepUp

Isolated

2m2m

Pg 3