Electronics


Resistors

Color Codes

ColorDigitMultiplierToleranceGeneral PurposePrecision
none

± 20%   General Resistor Precision Resistor
silver
0.01   ± 10%  
gold
0.1   ± 5%  
black 0 1   ± 20%  
brown 1 10   ± 1%  
red 2 100   ± 2%  
orange 3 1 k   ± 3%  
yellow 4 10 k   ± 4%  
green 5 100 k   ± 0.50%  
blue 6 1 M   ± 0.25%  
violet 7 10 M   ± 0.10%  
gray 8
± 0.05%  
white 9



Symbols

---VVVV---


In Series

Rtotal = R1 + R2


In Parallel

1/Rtotal = (1/R1) + (1/R2); Rtotal = R1xR2/(R1+R2)


Voltage Divider

Vout = IR2 = Vin(R2/(R1+R2)); I = Vin/(R1+R2)

Other Resources


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DISCLAIMER

Page author: Dawn Rorvik (rorvikd@evergreen.edu)
Last modified: 05/20/2003