The coding is defined in the international standard iec 60062. Which digit is represented by a black band on a resistor. This system was employed for resistors when the surface area was not sufficient to print the resistance value for the past. Resistor values are often indicated with color codes. On some of the larger wirewound resistors the value can be printed onto it in the normal way. There are two ways to find the resistance value of a resistor. Different codes are used for wire leads on devices such as transformers or in building wiring. This is to prevent having metal particles in the coating. Composition resistors are color coded to indicate resistance values or ratings. In our previous post we saw that there are many different types of resistor available that can be used in both electrical and electronic circuits. In the case of resistors, color coding is used to identify a specific resistance value, for example a 100 ohms resistor or a 1 kilo ohms resistor with 5% tolerance. The 4 color bands on the left side are grouped together to represent the resistance value of a resistor and the 5 th color band on the right side indicates the tolerance of the resistor the 1 st color band indicates the 1 st significant value or 1 st digit of the resistors value the 2 nd color band indicates the 2 nd significant value or 2 nd digit of the resistor value. Resistor color code system resistor color coding system applies to carbon film resistors, metal oxide film resistors, fusible resistors, precision metal film resistors, and wirewound resistors cylindrical with enlarged ends of the axial lead type.
Available in a variety of tensions from very light to extremely heavy, resistance bands are colorcoded to denote the level of tension. Jan 05, 2018 how to read colour code of resistor, smd resistor coderesistor color code. This is an international and universally accepted method, developed many years ago as a simple and quick way of identifying a resistors ohmic value no. Components that are sued by students generally has for band color schemes, the four band identification systems needs to be studied as the color of all the four bands are painted on the resistor in order to provide the resistance in. There are a number of ways in which this can be indicated. The standards for color coding registers are defined in international standards iec 60062. The use of color bands on the body of a resistor is the most common system for indicating the value of a resistor. What is the difference in colored resistance bands resistance bands are a portable, less expensive alternative to other strengthtraining tools, such as free weights and machines. The resistor colour code system is all well and good but we need to understand how to apply it in order to get the correct value of the resistor. Sep 28, 2015 resistor color code is used to indicate the value of resistance. Resistor color code 1st nd digit 2 digit 3rd digit multiplier stripe tolerance 4th stripe black 0 0 0 x 1 brown 1 1 1 x 10 1% red 2 2 2 x 100 orange 3 3 3 x 1 000 yellow 4 4 4 x 10 000 green 5 5 5 x 100 000 blue 6 6 6 x 1 000 000 purple 7 7 7 grey 8 8 8 white 9 9 9 gold x 0. Resistors are available in many different values, shapes, and physical sizes. Colorcoding is standardized by the electronic industries association eia.
Resistor color coding system applies to carbon film resistors, metal oxide film resistors, fusible resistors, precision metal film resistors, and wirewound resistors cylindrical with enlarged ends of the axial lead type. A resistors first three colour bands are brown, green and red. An electronic color code is used to indicate the values or ratings of electronic components, usually for resistors, but also for capacitors, inductors, diodes and others. The colour bands of the resistor would look like this. Select the number of bands, then their colors to determine the value and tolerance of the resistors or view all resistors digikey has to offer. Therefore, bands of color are used to represent the resistance value. Arnido jr instructor, colegio san agstin bacolod 2. Check out all about circuits resistor color code calculator, a handy tool for reading resistor color code values. How to read colour code of resistor, smd resistor coderesistor color code. Resistor colour code and resistor tolerances explained. Our resistor color code calculator is a handy tool for reading carboncomposition resistors whether its a 4band, 5band or 6band type. One common scheme is the letter and digit code for resistance. The color code consists of various color bands, which indicate the resistance values of resistors in ohms as well as the tolerance rating.
Different types of resistors and color coding in electronic. Just have a look to the resistor color code chart below and see the calculations, how the resistance value is. Resistor color code calculator and chart 4band, 5band or 6. The coding of color is defined in the international standard 1ec60062. Q1 which end of the resistor must be used for reading the colour codes. Updated resistor color code pdf chart resistor color.
Look for the 3 colors which they are near on each other. In the next tutorial about resistors, we will look at connecting resistors together in a series chain and prove that the total resistance is the sum of all the resistors added together. To calculate the resistance of a resistor, you can select the appropriate color bands in the above resistor color code calculator. Resistor color code chart how to identify resistance. A resistors first three colour bands are red, yellow and black. Generally, the resistance value, tolerance, and wattage rating are printed on the body of a resistor as numbers or letters when the resistors body is big. Determine, using a color code chart, its coded resistance, in units of ohms the symbol for which is. The notation to state a resistors value in a circuit diagram varies resistance colour code table pdf. Resistor color code chart understanding resistance color coding. To use this tool, simply click on a particular color and number and watch how the actual bands on the resistor illustration change. Hence, the resistance value of the given resistor is 2500 5%. This standard describes color coding for axially leaded resistors and numeric code for smd resistors. Find the value and tolerance of a 4band, 5band, or 6band resistor with our resistor colour code calculator or download our colour code pdf for reference.
The first three bands closest to one end of the resistor are used to determine the resistance. The fourth band represents the tolerance of the resistor. Which digit is represented by a blue band on a resistor. Resistor color code calculator and chart 4band, 5band. Determine, using the color code chart, the tolerance in percent of the resistor, and record this tolerance in column 3. The attractive rainbow colors adorning most fixed resistors serve a purpose beyond catching your eye. Reading resistor color codes is easy once you understand the meaning and the math behind each band used to indicate resistance value, tolerance, and sometimes even the temperature coefficient. The first and second bands represent a 2digit number that is multiplied by the value of the third band. Form both 5 and 4band resistors, the last band indicates tolerance in table 1. Given 10 different sets of color bands, determine the resistor values and tolerances. Resistor color coding system applies to carbon film resistors, metal oxide film resistors, fusible resistors, precision metal film resistors, and wirewound resistors. The lefthand or the most significant coloured band is the band which is nearest to a connecting lead with the colour coded bands being read from lefttoright as follows.
As shown in the following diagrams figure 1, there are 5band resistors and 4band resistors. This tool is used to decode information for color banded axial lead resistors. Practically all leaded resistors with a power rating up to one watt are marked with color bands. This is all about different resistors and the colorcode identification for resistance values. Aug 22, 2018 on every pinned through hole resistor, there are colored bands which denote the value of resistance in the resistor. The color code starts near the edge of one side of the resistor and consists of several. All resistors have three bands of colours, followed by a space and then a fourth band of colour.
The value of the resistance is found out by colour coding. Jun 06, 2019 this exam will test your ability to decode a resistors color code and calculate the resistance and tolerance of a resistor. Color coding is standardized by the electronic industries association eia. Thus, based on the amount of the resistance of a resistor, it.
There are several bands to specify the value of resistance. And also, the entire body of the resistor is colored. Resistor color coding 4 band, 5 band basic electronics. This exam will test your ability to decode a resistors color code and calculate the resistance and tolerance of a resistor. Because carbon resistors are physically small, they are color coded to identify their resistance value in ohms. What is the difference in colored resistance bands. Because carbon resistors are physically small, they are colorcoded to identify their resistance value in ohms. Available in a variety of tensions from very light to extremely heavy, resistance bands. The wattage rating indicates the amount of power the resistor can safely dissipate as heat. Resistor color code 6 band color code 5 band color code 4band color code gry8. The 5th color band on the right side represent the tolerance of the resistor and the 6th color band represents the tcr temperature coefficient of resistance. Ohms law trianglerelation between voltage, current, and resistance. A resistor is identified by its pattern of color of bands. Resistor color code chart handout pdf teachengineering.
Resistor color code system how to read the resistor code. A 6 band color code resistor consists of 6 color bands. Experiment 1 resistor color code and use of the ohmmeter. This skill is needed by technicians, engineers, and some hobbyists. Since the average resistor is too small to have the value printed on it, the resistance value is displayed using the color code the colored barsthe colored stripes.
The 4 color bands on the left side are grouped together to represent the resistors resistance value. It states that the amount of electric current flowing in a circuit is directly proportional to the voltage applied to the circuit, and inversely proportional to its resistance. The use of color bands on the body of a resistor is. To overcome this, resistor color coding is introduced. Black brown red orange yellow green blue violet gray white 3. Resistor color code chart understanding resistance color coding color coding is used in electronics to identify between different components.
On every pinned through hole resistor, there are colored bands which denote the value of resistance in the resistor. The mayo clinic website notes that darker bands generally provide more resistance. Findout the resistance using resistor color code calculator. Weve created a simple chart to explain resistor color coding for you. Resistor colour coding uses coloured bands to easily identify a resistors resistive value and its percentage tolerance. Types of resistors the two main characteristics of a resistor are its resistance, r, in ohms and its power rating, p, in watts.
Carbon composition, carbon film, metal film, wire wound, metal oxide resistor. The color bands on the body of the resistor tell how much resistance it has. Resistor color code 4 band, 5 band and 6 band resistors. A quiz about the resistor colour code, which should be simple enough for electricians, but not so easy for those without experience in this field.
A separate code, the 25pair color code, is used to identify wires in some telecommunications cables. For high voltage resistors often the colors gold and silver are replaced with yellow and gray. Steps in determining the value of the color coded resistor hold the resistor. The electronic color code was developed in the early 1920s by the radio manufacturing association and it is necessary to have color coding because when we want to use a resistance of particular rating it is difficult to know the resistance.
At present, token resistor color coding system is applying for automatization. Resistor color codes color codes electronics textbook. Almost all resistors pinned with a power rating of up to 1 watt are marked with color bands. Here are the steps to determine the value of the resistor. Using the coded resistance and the tolerance, find the maximum coded. Dont forget to download and make our handy diy resistor colour code wheel as a free and handy reference guide to help work out those resistor colour codes. Colorcoding identifies the nominal value and tolerance of most resistors. However the smaller resistors like those most commonly encountered are colour coded. It states that the amount of electric current flowing in a circuit is directly proportional to the voltage applied to the circuit, and inversely proportional to. This standard describes the marking codes for resistors and capacitors. This system was employed for resistors when the surface area was not sufficient to print the. The resistors have a band of colours shown in their outer covering. Resistor color coding uses colored bands to quickly identify a resistors resistive value and its percentage of tolerance with the physical size of the resistor indicating its wattage rating.
Carboncomposition and carbon film resistors are too small to have the resistance value printed on their housings. Resistance bands are a portable, less expensive alternative to other strengthtraining tools, such as free weights and machines. Black brown red orange yellow green blue violet gray white 2. Electrical resistance and the resistor introduction ohms law is the most fundamental equation in electric circuit analysis. Resistance resistor color code band 1 band 2 band 3. How to read colour code of resistor, smd resistor code. The resistance, r, provides the required reduction in current or the desired drop in voltage. Resistor color code is used to indicate the value of resistance.