Capacitor and Resistor Coding, Electronic Symbols
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Transcript of 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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etermine te val!e o0 te resistor)
brown black black silver
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Answer)
2:?
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etermine te val!e o0 te resistor)
red red red yellow
Resistor Coding
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Answer)
4"4(?
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etermine te val!e o0 te resistor)
green brown brown silver
Resistor Coding
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Answer)
82:?
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etermine te val!e o0 te resistor)
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