Capacitor and Resistor Coding, Electronic Symbols

7/25/2019 Capacitor and Resistor Coding, Electronic Symbols

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RESISTOR &CAPACITOR

CODING

ELECTRONICSYMBOLS


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RESISTORS


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Resistor Coding

A resistoris a passive two-terminal electrical component tatimplements electrical resistance as a

circ!it element"

Example of 4-band resistor


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Resistor Coding

Example of 5-band resistor Example of -band resistor


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Resistor Coding

We are already familiar with the significant digits, multiplier and

tolerance. The relatively new concept introduced is the

temperature coefficient. Temperature coefficient is defined asthe relative change of physical property when the temperature is

changed by 1 Kelvin. It is measured in ppm/K (parts per

million/Kelvin. !pm/K is an e"ample of pseudo#unit to describe

small values of miscellaneous dimensionless $uantities.

The table for the color codes of resistor bands. The first twobands represent the significant digits, the third band is for the

multiplier, and the last band is for the tolerance. %or five#band

resistors, the first three bands are the significant digits, the

fourth is the multiplier, and the last is the tolerance. %or si"#band

resistors, the first five bands are the same with that of five bandresistors and the last band represents the temperature

coefficient.


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Resistor Coding

To remem#er te color co$e easil% '!st (eep in min$)

Bad Bo!s Rape O"r Yo"ng #irls B"t $iolet #i%es&illingl!

*ere are te oter prases %o! ma% stic( wit)

+a$ +o%s Ravis O!r ,o!n Girls +ein$ .ictor% Gar$en/all

+lac( +ears Rai$ O!r ,ellow Grain +l!e .iolets Grow

/il$ ++ RO, 0rom Great +ritain a$ a .er% Goo$ /i0e

+a$ +oo1e Rots O!r ,o!n G!ts +!t .o$(a Goes/illinl%


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Resistor Coding

*ere are te steps on ow to rea$ resistors" Tis set

o0 steps is #asicall% 0or 0o!r-#an$ resistors"

2"Orient te resistor" Determine te colors o0 te

stripes 0rom le0t to rit"

TIP) Te 3rst stripe is !s!all% te one closest to te

e$e"

4" Te 3rst two #an$s represent te two sini3cant

$iits"5" Te tir$ #an$ serves as te m!ltiplier"

6" 7!ltipl% te sini3cant $iits #% te m!ltiplier"

8" Te 0o!rt #an$ is te tolerance"


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Resistor Coding

E9ample)

brown black red gold

Loo(in at te cart te 3rst color wic is #rown correspon$s to ten!m#er 2 #lac( is to : re$ is 2:;4 an$ ol$ sini3es


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Exer/ise


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etermine te val!e o0 te resistor)

yellow violet yellow (none):(?


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brown black black silver


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Answer)

2:?


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red red red yellow

Resistor Coding


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Answer)

4"4(?


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green brown brown silver

Resistor Coding


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Answer)

82:?


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brown black green (none)


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Answer)

27?


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C'0'CITORS


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Capacitor Co$in

Capa/itan/e

Tis is a meas!re o0 a capacitors a#ilit% to store care" A lare capacitancemeans tat more care can #e store$" Capacitance is meas!re$ in 0ara$ss%m#ol B" *owever 2B is ver% lare so pre39es are !se$ to sow te smallerval!es"

T2ree pre3xes m"ltipliers are "sed6 7 mi/ro6 n nano and p pi/o) means 2:-@milliont so 2::::::B F 2B

n means 2:-to!san$-milliont so 2:::nB F 2B

p means 2:-24million-milliont so 2:::pB F 2nB

Capa/itor 8"mber Code

A n!m#er co$e is o0ten !se$ on small capacitors were printin is $iHc!lt) te 2st n!m#er is te 2st $iit

te 4n$ n!m#er is te 4n$ $iit

te 5r$ n!m#er is te n!m#er o0 1eros to ive te capacitance in pB"

Inore an% letters - te% '!st in$icate tolerance an$ voltae ratin"


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E9ercise)

9e/ode t2e /apa/itor (it2 t2e 4:4;

stamp on it< 'nd indi/ate t2etoleran/e

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Capacitor and Resistor Coding, Electronic Symbols