While actually measuring the resistance before using it is a good idea, it is also a good idea to know what the resistance is supposed to be. A resistor limits the electric current that flows through a circuit. The five bands are used for resistors with a tight tolerance. A separate code, the 25pair color code, is used to identify wires in some telecommunications cables. To determine the value of a given resistor look for the gold or silver tolorance band and rotate the resistor as in the photo above. Look at the 1st color band and determine its color.
This exam will test your ability to decode a resistor s color code and calculate the resistance and tolerance of a resistor. Resistor color code calculator 4 and 5 band resistors. Sales, authorized distributors technical questions. However the smaller resistors like those most commonly encountered are colour coded. Different types of resistors and its color code calculation in electronics resistors are the most commonly used components in electronic circuits and devices.
Resistors are electrical components that create resistance in the flow of an electrical current, which allows the current to be controlled in order to power a device. Colour coding is used in r,l,c, components in electronic industry to mark values on components where printing is not convenient, and also where it is desired to be able to read value even after mounting the component on pcb. If we print resistance values, there is a chance of fading out the numbers. Also includes and ohms law calculator and a resistor color code quiz currently in.
Resistor color code and types of resistors introduction to resistors. Because carbon resistors are physically small, they are colorcoded to identify their resistance value in ohms. The electronic color code was established to make it easier to recognize the values of resistors and other components. The more expensive resistors are higher quality, so the specification is tighter. 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.
Composition resistors are color coded to indicate resistance values or ratings. Electronic components like resistors are very small in size and its difficult to print its. Our resistor color code calculator is a handy tool for reading carboncomposition resistors whether its a 4band, 5band or 6band type. Melf and leaded resistor products e96 series and e192 series. Appendix b nominal values and the color code for resistors. It should be noted that there is a 5band color code for nonprecision resistors as well, with the. Resistor color code chart resistors are devices that limit current flow and provide a voltage drop in electrical circuits. The first three stripes indicate the first 3 digits in the r value. Resistor color code chart handout pdf teach engineering. The resistor color code calculator decodes and identifies a value and tolerance of 5 band wire wound resistors.
In a resistor the energy of the electrons that pass through the resistor are changed to heat andor light. Resistors especially carbon composition can drift in their actual resistance. An important cognitive skill is the ability to detect and apply patterns in sets of data. Resistor color code calculator 3, 4 and 5 band resistors. The five and six band resistor colour code is more commonly associated with the high precision 1% and 2% film types while the common garden variety 5% and 10% general purpose types tend to use the four band resistor colour code. Take the quiz beforehand to check what you already know, and. The 4th color band indicates the resistors tolerance and is normally gold. Resistors are usually very tiny and it is difficult to print resistance values on them. On some of the larger wirewound resistors the value can be printed onto it in the normal way. Practically all leaded resistors with a power rating up to one watt are marked with color bands. Check out all about circuits resistor color code calculator, a handy tool for reading resistor color code values resistor values are often indicated with color codes. It is sometimes not obvious whether a color coded component is a resistor, capacitor, or inductor, and this may be deduced by knowledge of its circuit function, physical shape or by measurement.
A resistor is an electric element that limits the flow of the electric current into an electric circuit. The table can also be used to specify the color of the bands when the values are known. 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. Most resistors are color coded with multiple bands to identify the resistance value and the tolerance.
First find the tolerance band, it will typically be gold 5% and sometimes silver 10%. Electric circuit analysis i page 1 of 7 experiment no. Resistor color code chart how to identify resistance. The first three bands are used to indicate the significant values, the fourth band is the multiplier and the sixth band shows the tolerance. This band is the first one closest to one end of the capacitor. Resistor color codes pdf download build electronic. If there is no tolerance band, then find the side that has. A helpful little utility that allows you to find the value of a standard resistor without memorizing the color codes. An automatic resistor calculator can be used to quickly find the resistor values. This is an animated troubleshooting exercise that takes voltage measurements to determine the fault of three different series circuits. These colour bands are known as resistor colour code. Explains how to find resistance values and tolerances for 3, 4, 5 and 6 band resistors. Fiveband color code precision resistors often use a fiveband code to obtain more accurate r values. To measure the value of the resistor by digital multimeter dmm.
Do you wonder what the resistor color codes on your resistor mean. The resistor color code calculator decodes and identifies a value and tolerance of 4 band wire wound resistors. Three 3 band resistor resistance color code calculator. Weve created a simple chart to explain resistor color coding for you. The color code consists of various color bands, which indicate the resistance values of resistors in ohms as well as the tolerance rating. Resistor color code 4 band, 5 band and 6 band resistors. For the first and second colored bands, the values for black is 0, brown is 1, red is 2, orange is 3, yellow is 4, green is 5, blue is 6, violet is 7, grey is 8 and white is 9,three band resistorresistance color code calculator,calculate three band resistorresistance color code,once. For example, in a light bulb, the tungsten filament acts as a resistor that heats up because of the current going through it, causing it to glow.
Starting from the other end, identify the first band write down the number associated with that color. Resistor color coding system applies to carbon film resistors, metal oxide film resistors, fusible resistors, precision metal film resistors, and wirewound resistors. So, for a 560 ohm, 5% resistor the color stripes will be green, blue, brown and gold. The general purpose carbon film resistors which are used in electrical and electronic circuits are marked using a four colored bands. The value or the resistance of a resistor is obviously very important. Resistor color code calculator and chart 4band, 5band. Some circuits require precision resistors to operate correctly, so never use a replacement resistor with a wider tolerance. 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.
To use this tool, simply click on a particular color and number and watch how the actual bands on the resistor illustration change. Resistor colour code and resistor tolerances explained. The use of color bands on the body of a resistor is. 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 diagram helps you read the 5 band resistor color code. The resistance value is displayed on the field below together with the. Given 10 different sets of color bands, determine the resistor values and tolerances. So, colour bands are printed on them to represent the electrical resistance.
The first band cant be silver or gold, so if you hold such a resistor youll know instantly where to start. The main purpose of a resistor is to maintain specified values of voltage and current in an electronic circuit. Imagine how many blind technicians there would be otherwise. This skill is needed by technicians, engineers, and some hobbyists. Resistor color code 6 band color code 5 band color code 4band color code gry8. The other four fall into the same order as mentioned for resistors.
The use of color bands on the body of a resistor is the most common system for. The calculator will show the resistance value based on selected band. Note that the colorcode system for capacitors is very similar to that of resistors except there is a fifth band representing the temperature coefficient. The order in which the colors are arranged is very important, and each value of resistor has its own unique combination.
Resistors are available in many different values, shapes, and physical. A current that is passed through the resistor is always directly proportional to the voltage across the terminals of the resistors. Many resistors have high resistance values, sometimes in mega ohms. Resistor simple english wikipedia, the free encyclopedia.
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. You can easily figure out the resistance value of your resistor by looking at theses bands and comparing them with the colors in the table below. 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. Find the value and tolerance of a 4 band, 5 band, or 6 band resistor with our resistor color code calculator or download our color code pdf for reference. Green and blue are the first significant digits 56. Also, resistors must have the proper wattage value this indicates the amount of heat a resistor can handle. Different codes are used for wire leads on devices such as transformers or in building wiring.
Appendixb nominal values and the color code for resistors several types of resistors are available for use in electronic circuits. Here is an example that shows how the table and resistor shown above can be used to figure out a resistor value by proving that yellowvioletbrown is really 470. Resistors come in a range of tolerances but the two most common are the e12 and the e24 series. Updated resistor color code pdf chart resistor color. This versatile tool not only allows users to determine the value of a resistor based on the color code but also find the color codes for a 4 and 5 band resistor. 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 chart the chart below shows how to determine the resistance and tolerance for resistors. The quiz and worksheet help you evaluate your knowledge of color codes on resistors.