the12volt.com spacer
the12volt.com spacer
the12volt.com - Free Technical Information for Mobile Electronics Installers, Enthusiasts, and Do-It-Yourselfers since 1999 Ohm's Law - It Rules!
the12volt.com spacer
the12volt.com - Free Technical Information for Mobile Electronics Installers
the12volt.com - Free Technical Information for Mobile Electronics Installers
BasicsCar AudioCar SecurityCruise ControlsDiodesDoor LocksOhm's LawPassive CrossoversRelaysResistorsSubwoofer Enclosures Search
the12volt.com - Free Technical Information for Mobile Electronics Installers
the12volt.com - Free Technical Information for Mobile Electronics Installers
the12volt.com - Free Technical Information for Mobile Electronics Installers
Application GuideCalculators, Charts, DiagramsDownloads/ManualsFind InstallersForumsGlossarySubwoofer WiringToolsVehicle Wiring Recent Topics
the12volt.com spacer
the12volt.com spacer
the12volt.com spacer
the12volt.com spacer
  the12volt.com spacer

the12volt.com spacer
the12volt.com spacer
the12volt.com spacer
the12volt.com spacer
Diodes
Glossary of Terms
Ohm's Law
Relays
Resistors
Tools and Equipment
Wire Sizes
Introduction
Parallel & Series Calcs
Passive Crossovers
Port Length Calculators
Subwoofer Box Calculators
Subwoofer Enclosure Types
Subwoofer Wiring Wizard
Thiele - Small Parameters
Miscellaneous
Relay Diagrams
Vehicle Wiring Database
Introduction
Alarm Accessories
Alarm Modules
Alarm Sensors
Basic Connections
Illuminated Entry
Light Flash
Power Door Locks
Starter Interrupts
Installation Pictorials
Relay Diagrams
Vehicle Wiring Database
Introduction
Electrical Connections
Mechanical Connections
Servo Settings
VSS and Tach Info
Vehicle Wiring Databse
All Forums
Buy & Sell Equipment
Car Audio
Car Audio Hot Topics
Car Security & Convenience
Car Security Hot Topics
Car Security Pictorials
Cellular & Communications
Cruise Controls
Employment
Fiberglass & Fabrication
General Discussion
Lights, Neon, LEDs, HIDs
Marine Electronics
Miscellaneous
Mobile Video & Navigation
Motorcycle Electronics
Music, Favorite Songs
Relays
Rides & Systems Gallery
Vehicle Information
Recent Forum Topics
Forum Help & How To
Forum & Site Notices
Books & DVDs
Calculators
Charts
Diagrams
Downloads - Manuals
Find an Installer
Forums - Q&A
Glossary of Terms
Insurance for Car Stereos
Links
Mobile Tech News
Relay Diagrams
The Application Guide
Vehicle Wiring Database
About the12volt
Support Us
the12volt.com spacer
the12volt.com spacer
the12volt.com spacer
the12volt.com spacer

 
the12volt.com spacer

Resistors, Resistor Color Codes, Resistor Color Code Calculator

Resistors, like diodes and relays, are another of the electronic parts that should have a section in the installer's parts bin. They have become a necessity for the mobile electronics installer, whether it be for door locks, parking lights, timing circuits, remote starts, LED's, or just to discharge a stiffening capacitor.

Resistors "resist" the flow of electrical current. The higher the value of resistance (measured in ohms) the lower the current will be.

Resistors are color coded. To read the color code of a common 4 band 1K ohm resistor with a 5% tolerance, start at the opposite side of the GOLD tolerance band and read from left to right. Write down the corresponding number from the color chart below for the 1st color band (BROWN). To the right of that number, write the corresponding number for the 2nd band (BLACK) . Now multiply that number (you should have 10) by the corresponding multiplier number of the 3rd band (RED)(100). Your answer will be 1000 or 1K. It's that easy.

* If a resistor has 5 color bands, write the corresponding number of the 3rd band to the right of the 2nd before you multiply by the corresponding number of the multiplier band. If you only have 4 color bands that include a tolerance band, ignore this column and go straight to the multiplier.

1K Resistor
The tolerance band is usually gold or silver, but some may have none. Because resistors are not the exact value as indicated by the color bands, manufactures have included a tolorance color band to indicate the accuracy of the resistor. Gold band indicates the resistor is within 5% of what is indicated. Silver = 10% and None = 20%. Others are shown in the chart below. The 1K ohm resistor in the example (left), may have an actual measurement any where from 950 ohms to 1050 ohms.

If a resistor does not have a tolerance band, start from the band closest to a lead. This will be the 1st band. If you are unable to read the color bands, then you'll have to use your multimeter. Be sure to zero it out first!
 
top of page Resistor Color Codes
Band Color 1st Band # 2nd Band # *3rd Band # Multiplier x  Tolerances  ± %
Black 0 0 0 1  
Brown 1 1 1 10     ± 1%
Red 2 2 2 100     ± 2 %
Orange 3 3 3 1000  
Yellow 4 4 4 10,000  
Green 5 5 5 100,000     ± 0.5 %
Blue 6 6 6 1,000,000     ± 0.25 %
Violet 7 7 7 10,000,000     ± 0.10 %
Grey 8 8 8 100,000,000     ± 0.05 %
White 9 9 9 1,000,000,000  
Gold 0.1     ± 5 %
Silver 0.01     ± 10 %
None     ± 20 %



top of page Resistor Color Code Calculator
Below is a JavaScript apllication for determining resistor values, courtesy of Danny Goodman. Just select the color for each band and the value will automatically be displayed. Please note, this is for 4 band resistors only. Note: May not work in some versions of Opera.

GRAPHICAL RESISTANCE CALCULATOR in JAVASCRIPT Version 2.0
by Danny Goodman (dannyg@dannyg.com)
Analyzed and described at length in
"JavaScript Bible"
(Amazon Books ISBN 0764547186)
This program is Copyright 1996 by Danny Goodman.
 

Mobile Electronics Basics:
Diodes
Glossary of Terms and Definitions
Ohm's Law
Relays
Resistors
the12volt's Install Bay - Mobile Electronics Forums
Tools and Equipment






space
the12volt.com spacer
google plus
Search the12volt.com
Custom Search
Follow the12volt.com: Follow the12volt.com on Facebook
Share, print & email this page:
Sunday, November 23, 2014 Copyright © 1999-2014 the12volt.com Donate to the12volt.com Privacy Policy Advertising
the12volt.com spacer
the12volt.com spacer
the12volt.com spacer
BasicsCar AudioCar SecurityCruise ControlsDiodesDoor LocksOhm's LawPassive CrossoversRelaysResistorsSubwoofer Enclosures Search
the12volt.com - Free Technical Information for Mobile Electronics Installers
the12volt.com - Free Technical Information for Mobile Electronics Installers
the12volt.com - Free Technical Information for Mobile Electronics Installers
Application GuideCalculators, Charts, DiagramsDownloads/ManualsFind InstallersForumsGlossarySubwoofer WiringToolsVehicle Wiring Recent Topics
the12volt.com spacer
the12volt.com spacer
the12volt.com spacer
the12volt.com - Free Technical Information for Mobile Electronics Installers, Enthusiasts, and Do-It-Yourselfers since 1999 Donate to the12volt.com
the12volt.com spacer
the12volt.com spacer