The 4 color bands on the left side are grouped together to represent the resistors resistance value. The coding is defined in the international standard iec 60062. The resistors have a band of colours shown in their outer covering. Q1 which end of the resistor must be used for reading the colour codes. Jun 06, 2019 this exam will test your ability to decode a resistors color code and calculate the resistance and tolerance of a resistor. 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 first and second bands represent a 2digit number that is multiplied by the value of the third band. Check out all about circuits resistor color code calculator, a handy tool for reading resistor color code values. 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. Composition resistors are color coded to indicate resistance values or ratings. Determine, using a color code chart, its coded resistance, in units of ohms the symbol for which is. Almost all resistors pinned with a power rating of up to 1 watt are marked with color bands. A 6 band color code resistor consists of 6 color bands. The wattage rating indicates the amount of power the resistor can safely dissipate as heat.
This exam will test your ability to decode a resistors color code and calculate the resistance and tolerance of a resistor. The use of color bands on the body of a resistor is the most common system for indicating the value of a resistor. The value or the resistance of a resistor is obviously very important. There are a number of ways in which this can be indicated. Working of resistorsresistance,unit,symbol,types,colour. How to read colour code of resistor, smd resistor code. Color coding 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 its resistance. There are several bands to specify the value of resistance.
Carbon composition, carbon film, metal film, wire wound, metal oxide resistor. Available in a variety of tensions from very light to extremely heavy, resistance bands are colorcoded to denote the level of tension. Ohms law trianglerelation between voltage, current, and resistance. On some of the larger wirewound resistors the value can be printed onto it in the normal way. The fourth band represents the tolerance of the resistor. Steps in determining the value of the color coded resistor hold the resistor. The notation to state a resistors value in a circuit diagram varies resistance colour code table pdf. To calculate the resistance of a resistor, you can select the appropriate color bands in the above resistor color code calculator. The colour bands of the resistor would look like this. The standards for color coding registers are defined in international standards iec 60062. Different types of resistors and color coding in electronic.
Colorcoding identifies the nominal value and tolerance of most resistors. At present, token resistor color coding system is applying for automatization. Resistor color code is used to indicate the value of resistance. A resistors first three colour bands are red, yellow and black. Resistor color code chart understanding resistance color coding color coding is used in electronics to identify between different components. Resistance bands are a portable, less expensive alternative to other strengthtraining tools, such as free weights and machines. 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. 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. All resistors have three bands of colours, followed by a space and then a fourth band of colour. Therefore, bands of color are used to represent the resistance value. Resistor values are often indicated with color codes. This standard describes the marking codes for resistors and capacitors.
This skill is needed by technicians, engineers, and some hobbyists. Different codes are used for wire leads on devices such as transformers or in building wiring. This standard describes color coding for axially leaded resistors and numeric code for smd resistors. 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. 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. Resistor color code 4 band, 5 band and 6 band resistors. Practically all leaded resistors with a power rating up to one watt are marked with color bands. The color code consists of various color bands, which indicate the resistance values of resistors in ohms as well as the tolerance rating. The coding of color is defined in the international standard 1ec60062. There are two ways to find the resistance value of a resistor. Look for the 3 colors which they are near on each other. Resistor color code chart handout pdf teachengineering. 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.
To overcome this, resistor color coding is introduced. Resistor color coding system applies to carbon film resistors, metal oxide film resistors, fusible resistors, precision metal film resistors, and wirewound resistors. One common scheme is the letter and digit code for resistance. 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. Just have a look to the resistor color code chart below and see the calculations, how the resistance value is.
Weve created a simple chart to explain resistor color coding for you. Hence, the resistance value of the given resistor is 2500 5%. Resistors are available in many different values, shapes, and physical sizes. Because carbon resistors are physically small, they are color coded to identify their resistance value in ohms. Resistor color code 6 band color code 5 band color code 4band color code gry8. Resistor color codes color codes electronics textbook. 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. Colorcoding is standardized by the electronic industries association eia. Resistor color code chart how to identify resistance. To use this tool, simply click on a particular color and number and watch how the actual bands on the resistor illustration change.
Here are the steps to determine the value of the resistor. Arnido jr instructor, colegio san agstin bacolod 2. 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. Determine, using the color code chart, the tolerance in percent of the resistor, and record this tolerance in column 3. A resistors first three colour bands are brown, green and red. Available in a variety of tensions from very light to extremely heavy, resistance bands.
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. 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. 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. Black brown red orange yellow green blue violet gray white 3. The color code starts near the edge of one side of the resistor and consists of several. For high voltage resistors often the colors gold and silver are replaced with yellow and gray. 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. 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. A separate code, the 25pair color code, is used to identify wires in some telecommunications cables. 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. The first three bands closest to one end of the resistor are used to determine the resistance. The use of color bands on the body of a resistor is. This tool is used to decode information for color banded axial lead resistors.
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. Our resistor color code calculator is a handy tool for reading carboncomposition resistors whether its a 4band, 5band or 6band type. The colored bands specify together the resistance value, the. Aug 22, 2018 on every pinned through hole resistor, there are colored bands which denote the value of resistance in the resistor. Jan 05, 2018 how to read colour code of resistor, smd resistor coderesistor color code. A resistor is identified by its pattern of color of bands. This is to prevent having metal particles in the coating. This system was employed for resistors when the surface area was not sufficient to print the resistance value for the past. Resistor color code calculator and chart 4band, 5band.
Resistance resistor color code band 1 band 2 band 3. Because carbon resistors are physically small, they are colorcoded to identify their resistance value in ohms. Black brown red orange yellow green blue violet gray white 2. Resistor colour coding uses coloured bands to easily identify a resistors resistive value and its percentage tolerance. Which digit is represented by a black band on a resistor. Resistor color coding 4 band, 5 band basic electronics. 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. Types of resistors the two main characteristics of a resistor are its resistance, r, in ohms and its power rating, p, in watts. On every pinned through hole resistor, there are colored bands which denote the value of resistance in the resistor. Sep 28, 2015 resistor color code is used to indicate the value of resistance. As shown in the following diagrams figure 1, there are 5band resistors and 4band resistors. Experiment 1 resistor color code and use of the ohmmeter.
Carboncomposition and carbon film resistors are too small to have the resistance value printed on their housings. 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. However the smaller resistors like those most commonly encountered are colour coded. This system was employed for resistors when the surface area was not sufficient to print the. Resistor color code chart understanding resistance color coding. The mayo clinic website notes that darker bands generally provide more resistance. And also, the entire body of the resistor is colored. Form both 5 and 4band resistors, the last band indicates tolerance in table 1. This is all about different resistors and the colorcode identification for resistance values.
Electrical resistance and the resistor introduction ohms law is the most fundamental equation in electric circuit analysis. 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. Findout the resistance using resistor color code calculator. 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. 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. Which digit is represented by a blue band on a resistor.
The resistance, r, provides the required reduction in current or the desired drop in voltage. 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 color bands on the body of the resistor tell how much resistance it has. Given 10 different sets of color bands, determine the resistor values and tolerances. How to read colour code of resistor, smd resistor coderesistor color code. Resistor color code calculator and chart 4band, 5band or 6. Using the coded resistance and the tolerance, find the maximum coded. Updated resistor color code pdf chart resistor color.
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