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. Updated resistor color code pdf chart resistor color. 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. To use this tool, simply click on a particular color and number and watch how the actual bands on the resistor illustration change. Black brown red orange yellow green blue violet gray white 3. Resistor color codes color codes electronics textbook. Using the coded resistance and the tolerance, find the maximum coded. Resistor color code chart understanding resistance color coding.
The first three bands closest to one end of the resistor are used to determine the resistance. How to read colour code of resistor, smd resistor coderesistor color code. Determine, using a color code chart, its coded resistance, in units of ohms the symbol for which is. Composition resistors are color coded to indicate resistance values or ratings. Because carbon resistors are physically small, they are color coded to identify their resistance value in ohms.
There are several bands to specify the value of resistance. Which digit is represented by a black band on a resistor. Arnido jr instructor, colegio san agstin bacolod 2. 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. Resistor colour coding uses coloured bands to easily identify a resistors resistive value and its percentage tolerance. Findout the resistance using resistor color code calculator. Resistor color code 6 band color code 5 band color code 4band color code gry8.
The colour bands of the resistor would look like this. Form both 5 and 4band resistors, the last band indicates tolerance in table 1. Because carbon resistors are physically small, they are colorcoded to identify their resistance value in ohms. 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. 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. This standard describes the marking codes for resistors and capacitors. 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. Just have a look to the resistor color code chart below and see the calculations, how the resistance value is. The color code consists of various color bands, which indicate the resistance values of resistors in ohms as well as the tolerance rating. The wattage rating indicates the amount of power the resistor can safely dissipate as heat. Different types of resistors and color coding in electronic. 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. 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.
The coding of color is defined in the international standard 1ec60062. Jan 05, 2018 how to read colour code of resistor, smd resistor coderesistor color code. Resistor values are often indicated with color codes. Therefore, bands of color are used to represent the resistance value. A resistors first three colour bands are red, yellow and black. Resistor color code 4 band, 5 band and 6 band resistors. The fourth band represents the tolerance of the resistor. What is the difference in colored resistance bands. 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. Types of resistors the two main characteristics of a resistor are its resistance, r, in ohms and its power rating, p, in watts. 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.
The value of the resistance is found out by colour coding. The color code starts near the edge of one side of the resistor and consists of several. Look for the 3 colors which they are near on each other. The standards for color coding registers are defined in international standards iec 60062. On some of the larger wirewound resistors the value can be printed onto it in the normal way.
A separate code, the 25pair color code, is used to identify wires in some telecommunications cables. Resistor color code chart understanding resistance color coding color coding is used in electronics to identify between different components. Resistor color coding system applies to carbon film resistors, metal oxide film resistors, fusible resistors, precision metal film resistors, and wirewound resistors. A resistors first three colour bands are brown, green and red. Q1 which end of the resistor must be used for reading the colour codes. Steps in determining the value of the color coded resistor hold the resistor. 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. Jun 06, 2019 this exam will test your ability to decode a resistors color code and calculate the resistance and tolerance of a resistor. Check out all about circuits resistor color code calculator, a handy tool for reading resistor color code values. 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. As shown in the following diagrams figure 1, there are 5band resistors and 4band resistors. 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.
Resistor color code system how to read the resistor code. This tool is used to decode information for color banded axial lead resistors. All resistors have three bands of colours, followed by a space and then a fourth band of colour. The attractive rainbow colors adorning most fixed resistors serve a purpose beyond catching your eye. This system was employed for resistors when the surface area was not sufficient to print the. How to read colour code of resistor, smd resistor code. 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.
This is all about different resistors and the colorcode identification for resistance values. This system was employed for resistors when the surface area was not sufficient to print the resistance value for the past. Resistor color code chart how to identify resistance. Working of resistorsresistance,unit,symbol,types,colour. There are a number of ways in which this can be indicated. However the smaller resistors like those most commonly encountered are colour coded. Resistor color code calculator and chart 4band, 5band or 6. Colorcoding is standardized by the electronic industries association eia. 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. To calculate the resistance of a resistor, you can select the appropriate color bands in the above resistor color code calculator.
Thus, based on the amount of the resistance of a resistor, it. There are two ways to find the resistance value of a resistor. Resistor color code calculator and chart 4band, 5band. 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. Aug 22, 2018 on every pinned through hole resistor, there are colored bands which denote the value of resistance in the resistor. The colored bands specify together the resistance value, the. This is to prevent having metal particles in the coating. A 6 band color code resistor consists of 6 color bands. Color coding is standardized by the electronic industries association eia.
Carbon composition, carbon film, metal film, wire wound, metal oxide resistor. And also, the entire body of the resistor is colored. The 4 color bands on the left side are grouped together to represent the resistors resistance value. 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. 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. Which digit is represented by a blue band on a resistor. 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. Resistor color coding 4 band, 5 band basic electronics. 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. This exam will test your ability to decode a resistors color code and calculate the resistance and tolerance of a resistor. Different codes are used for wire leads on devices such as transformers or in building wiring. One common scheme is the letter and digit code for resistance.
To overcome this, resistor color coding is introduced. Resistor colour code and resistor tolerances explained. Colorcoding identifies the nominal value and tolerance of most resistors. Given 10 different sets of color bands, determine the resistor values and tolerances. Our resistor color code calculator is a handy tool for reading carboncomposition resistors whether its a 4band, 5band or 6band type. 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. Practically all leaded resistors with a power rating up to one watt are marked with color bands. The mayo clinic website notes that darker bands generally provide more resistance.
Here are the steps to determine the value of the 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. This skill is needed by technicians, engineers, and some hobbyists. The notation to state a resistors value in a circuit diagram varies resistance colour code table pdf. 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. The first and second bands represent a 2digit number that is multiplied by the value of the third band. The color bands on the body of the resistor tell how much resistance it has. The use of color bands on the body of a resistor is.
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. Determine, using the color code chart, the tolerance in percent of the resistor, and record this tolerance in column 3. Weve created a simple chart to explain resistor color coding for you. 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. The coding is defined in the international standard iec 60062. Resistor color code is used to indicate the value of resistance. A resistor is identified by its pattern of color of bands.
Resistance resistor color code band 1 band 2 band 3. Experiment 1 resistor color code and use of the ohmmeter. 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. For high voltage resistors often the colors gold and silver are replaced with yellow and gray. The use of color bands on the body of a resistor is the most common system for indicating the value of a resistor. Ohms law trianglerelation between voltage, current, and resistance. Available in a variety of tensions from very light to extremely heavy, resistance bands. Resistor color code chart handout pdf teachengineering. Almost all resistors pinned with a power rating of up to 1 watt are marked with color bands. At present, token resistor color coding system is applying for automatization.
Electrical resistance and the resistor introduction ohms law is the most fundamental equation in electric circuit analysis. Available in a variety of tensions from very light to extremely heavy, resistance bands are colorcoded to denote the level of tension. 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. On every pinned through hole resistor, there are colored bands which denote the value of resistance in the resistor. The resistors have a band of colours shown in their outer covering. Black brown red orange yellow green blue violet gray white 2. Resistors are available in many different values, shapes, and physical sizes.
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