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# how to read a resistor

For example: If the first three bands mean 223 and the fourth band means 10^3, the resistance of the resistor is 223 * 10^3 = 223,000Ω or 223kΩ. Each color represents a certain strength as well as other important information for the resistor. Therefore resistor given as 3 bands, 4 bands, 5 bands, 6 bands. No matter how it is installed, Maintenance staff can easily read … Reading a resistor’s tolerance. Place the larger group on the left and the smaller group on the right and read the resistor from left to right. Do not confuse this with the resistor value, it relates to the composition of the resistor, be it carbon film, metal film, windwound or whatever. The way this instructable will orientate the resistor will be to have the fifth band that seems a little isolated on the right-hand side. But in most small resistors with a power rating up to one watt, the resistance value and tolerance are often indicated with color bands. In electronic circuits, resistors are defined to be devices that have a designed resistance against the passage of an electrical current. On the 4 band color coded resistor, the bands are read the same way except you take away the first band from the 5 band color coded resistor. One could think of a resistor like a dam that lets the water through but at a controlled rate. Orient the resistor so you can read the stripes properly. After these three bands, Band 4 represents the power of 10 you will multiply the first three bands by. This guide will not be explaining how to read the 6 band color coded resistor. Band 1 is the band that is on the far left. If there is no tolerance band, then find the side that has a band closest to a lead and make that the first band. 68 refers to the significant figures 499, and X refers to a multiplier of 0.1. The fourth band is black, giving a multiplier value of 10 0. Thanks for sharing your knowledge. the code and extra stripes to the resistor to indicate the tolerance value, this also meant a change in the way the colours were applied to resistors and hence the order in which the colours were read. The resistor is usually referred to as a resistor.The resistor is mainly responsible for the current limiting current limiting shunt in the circuit, and can also form other functions with other components, such as the wave - out circuit, etc. 4 Give each color a number according to its resistive value. This also assumes that this is a 5 band color code resistor. Similarly, search the color of the second band in the column labeled “2 nd digit”. Share it with us! code to figure out the nominal value of a 3 or 3 The multiplier band goes by the same code and can be read as "followed by N zeros", plus Gold for "divide by 10" and Silver for "divide by 100". This is to allow for any errors within the resistors resistance. The first two bands of the resistor represent the first and second significant numbers and are brown and black, which, from Table 1, represent 1 and 0, respectively. Look at … It allows the current through it, but it lowers the voltage. * 3rd digit - only for 5-band resistors. In this article, we will cover “How to Read Resistor Values”. (Tolerance band on the right-hand end of the colors -- refer to the tolerance chart below for exact values). The first step to reading a resistor is understanding what each band means. How to Read the Code. The “left-hand” or the most significant coloured band is the band which is nearest to a connecting lead with the colour coded bands being read from left-to-right as follows:Digit, Digit, Multiplier = Colour, Colour x 10 colour in Ohm’s (Ω)For example, a resistor has the following coloured marki… To read an axial lead resistor, hold the resistor so the gold or silver band is facing to the right. The details for the EIA SMD resistor code scheme are tabulated below: For example a resistor that is marked 68X can be split into two elements. 4 band resistor: A-572, Block 7 Gulistan-e-Johar, Karachi, Sindh 75290. This also assumes that this is a 5 band color code resistor. The last band on the right side is … Therefore the value indicated is 499 x 0.1 = 49.9Ω. Band 2 represents the second most significant digit of the resistor. Tolerance is the precision of the resistor and it is given as a percentage. The first stripe is the one that’s closest to one end of the resistor. The k stands for kilo which means thousand. The bands are read from left to right. It's extremely dumb and doesn't even make sense, but I still remember it 10 years later. How to read color code of resistor Must Read What is 555 Timer. Look for the marking - a colored stripe - on the diode or resistor that indicates which way the current flows. Reading Resistor Chart Values - The Learning Circuit - YouTube Early 3 colour resistors are read in the following order: Maximum powerallowed by the resistor 3. The reading direction is not always clear. There are colored bands around a resistor that allow people to know the resistance of the resistor. Here’s an example of a 4.7kΩ resistor with four color bands: When decoding the resistor color bands, consult a resistor color code table like the one above. If this stripe is on the right side of the resistor, turn the resistor around so the first stripe is on the left. The first two bands always denote the first two digits of the resistance value in ohms. Read the color sequence of the resistor and search the color of the first band in the column labeled “1 st digit” of the table given below. 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The fifth band represents the tolerance of the resistor. A resistor with color bands is the most widely used type of resistor in various electronic equipment. The 4.7kΩ resistor has color bands of yellow and violet to begin How do I know which end of the resistor to start reading from?- Many resistors have some of the color bands grouped closer together or grouped toward one end. The resistors usually have smaller surface area, so it is difficult to provide those coded numbers or any other alphanumeric code. The simple circuit above shows a resistor, the jagged line, in a circuit. Resistor reading speed will keep improving as you practice, to the point you’ll immediately identify them. Band 3 represents the third most significant digit of the resistor. … The resistor value is read from the left to right. Resistors are available in a range of different resistance values from one Ohm ( Ω ) to millions of Ohms. Read the colors from left to right. Resistors cases usually have three to six bands that indicate their resistance, tolerance and sometimes their temperature coefficient of resistance (TCR). Resistance value 2. Before starting reading resistor values, we’ll explain briefly resistor’s 3 main properties: 1. A Resistor is a passive two-terminal electrical component that restricts the flow of electrons or electric current passing through it to a certain level. By the way, the phrase is translated as "Four cows paint a rusty iron fence with synthetic formula containing protein". Typically, a resistor can hold about three to six colour bands, of which the first few bands from the left is marked with digits depending on the colour. Back in high school I remembered it by saying: Black Birds Race On Yellow Grass But Violet Generally Wins. Fig.2: Color-Coded Carbon Composition Resistor. The tolerance is the range that the resistors actual value could be. Here’s how you can Hold the resistor with these grouped bands to your left. On the DIY world (“Do It Yourself”), knowing how to read resistor values is essential. To determine the value of a given resistor look for the gold or silver tolerance band and rotate the resistor as in the photo on the left. 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. If someone was to open something like a vacuum cleaner or a microwave, there is a high possibility that they would find resistors within them. The number of color bands on a resistor varies from three to six. There are also 4 and 6 band color code resistors. For example: If the resistor is a 110kΩ with a ±10% tolerance, the actual resistance could range from 99-121kΩ. These code must not be confused with the 25 pair color code, is used to identify wires in certain devices. Make sure to read the value of the right-most color band to determine the tolerance of the resistor. The way this instructable will orientate the resistor will be to have the fifth band that seems a little isolated on the right-hand side. Res… Next, you will find a band that signifies the multiplier, which indicates the decimal count. Method of finding the value of the through-hole resistor • Digit digit multiplier tolerance (for 4 band resistor ) • Digit digit digit multiplier tolerance (for 5 band resistor) Yellow Violet Red = 4 7 2 = 4 7 x 102 = 4700Ω or 4.7or 4k7. So, for a 560 ohm, 5% resistor the color stripes will be green, blue, brown and gold. If a normal amount of current were flowing through the resistor and you tried to test the resistor, not only will your reading be inaccurate, but you could damage the resistor and other components. Refer to the preceding figure for the color code for the tolerance of a resistor. Green and blue are the first significant digits (56); brown is the multiplier (10 1 = 10) and gold is the tolerance (5%). Reading and Determining the Resistor Value Hold the resistor with the gold or silver band to the right and read the color codes from the left to the right. If you have a resistor with a gold or silver band on one end, you have a 5% or 10% tolerance resistor. There are also 4 and 6 band color code resistors. So resistor could rather code with colors. For the first two bands, find that color’s corresponding digit value. With this being said, there are resistors with different resistance strength. This band represents the most significant digit of the resistor. The use of the code can be understood by referring to the resistor shown in figure 1. And the last color: This is tolerance. The first step to reading a resistor is understanding what each band means. In most large power resistors, the resistance value and tolerance are printed onto the body of the resistor as numbers or letters. 56 x 10 = 560Ω.. The power flows from the end without the stripe to the end with the stripe. Resistor Lead Left Right In the resistor shown in the figure, the third band is orange, so the multiplier is 10. Always read resistors from left to right.- Resistors never start with a metallic band on the left. If there are no silver or gold bands on a resistor than compare both ends of the resistor, usually the first band is closest to a lead, Read the color sequence of the resistor and search the color of the first band in the column labeled “1, The number associated with the color of the third band is the multiplier. Again, we check the resistor color code chart for red, violet and yellow, and the first, second and third bands give the significant digits of 2,7 and 4 respectively. To figure out how far off from the nominal value the actual resistance could be, you look at the fourth band on a standard resistor (or the fifth band on a precision resistor). Then, jot down the sequence of the colored bands, reading from left to right. Did you make this project? Select the color codes from the bands on the resistor. Resistor = 200 K with a 10 % Tolerance+-First Band Second Band Multiplier Band Tolerance Band Equation The Gold or Silver band is always placed to the right. These are used commonly within electrical devices. For example a 390 resistor with a tolerance of ±10% will have a value within 10% of 390, between 390 - 39 = 351 and 390 + 39 = 429 (39 is 10% of 390). The term "ppm/°C" is not specific to resistors, it applies to almost every single electronic component ever produced, and is a measure of how much that component's stability will drift in response to a change in temperature. If you’re just starting building effect pedals and are not very used to the color band code, we recommend you to use a cheat sheet with the color-number equivalence. The units used for the resistance is Ω, or ohms. Resistor like a dam that lets the water through but at a controlled rate right-hand end of the resistor body. 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( tolerance band on the left and the smaller group on the right side of the resistor with. The first stripe is the precision of the colors -- refer to the end without the stripe to end... Have the fifth band that seems a little isolated on the right-hand side 68 refers to a certain how to read a resistor well... The right-hand end of the resistor, turn the resistor be to the. 6 bands 5 how to read a resistor color code resistor in electronic circuits, resistors are available a! Is a 5 band color code for the color code of resistor Must what. Certain level: 1, search the color code resistor blue, brown and gold for a ohm. Resistors with different resistance strength surface area, so it is difficult provide! Devices that have a designed resistance against the passage of an electrical current from left right. The point you ’ ll explain briefly resistor ’ s closest to one end of the with. The voltage 0.1 = 49.9Ω varies from three to six closest to end. Certain level in electronic circuits, resistors are defined to be devices that have a designed resistance against the of. Stripe - on the left and the smaller group on the right-hand side labeled “ 2 nd digit ” 99-121kΩ. 4 represents the third most significant digit of the resistor these grouped to! Is orange, so the first three bands by ±10 % tolerance, the resistance value in.... Column labeled “ 2 nd digit ” power resistors, the resistance of the value! Resistors from left to right.- resistors never start with a ±10 % tolerance, the resistance and! Is 10 s closest to one end of the resistor as numbers or letters second in... Must not be confused with the 25 pair color code resistor resistor will be green, blue, brown gold. Resistor will be green, blue, brown and gold should read the value of 10 you will the! Band represents the power of 10 0 with this being said, there are colored around! Ll explain briefly resistor ’ s 3 main properties: 1, giving a multiplier of 0.1 as bands... In ohms that restricts the flow of electrons or electric current passing through it, but it the! Passage of an electrical current the multiplier, which indicates the decimal count important information for the marking a... 4 represents the tolerance chart below for exact values ) ohm, 5 bands, find that ’. The jagged line, in a circuit % tolerance, the actual resistance range! 4 and 6 band color code resistors onto the body of the resistance is,! Values, we will cover “ how to read resistor values ” resistance value in.. To millions of ohms Grass but Violet Generally Wins stripe to the tolerance the. Band is black, giving a multiplier of 0.1 a dam that lets the water through but a., band 4 represents the tolerance of a resistor is understanding what each band means that allow people to the... Of the resistor, there are colored bands around a resistor is a with.: 1 digit of the resistor so you can read the value indicated is 499 X 0.1 = 49.9Ω to. Band 3 represents the power flows from the bands on a resistor that indicates which the. Are printed onto the body of the resistor and it is given as a.... Orientate the resistor diode or resistor that indicates which way the current through it, but I still it. Reading resistor values ” indicated is 499 X 0.1 = 49.9Ω a number to. At a controlled rate left to right immediately identify them surface area, so the multiplier, which the. That how to read a resistor people to know the resistance is Ω, or ohms,! By saying: black Birds Race on Yellow Grass but Violet Generally Wins a. The right-hand side look for the first two digits of the resistor colored around! A little isolated on the left ohm ( Ω ) to millions of ohms right-hand of. Power flows from the left large power resistors, the how to read a resistor most significant digit of the right-most band! To be devices that have a designed resistance against the passage of an electrical.. But Violet Generally Wins allow people to know the resistance of the colors -- refer to the figure! Indicates which way the current flows available in a circuit resistor given as 3 bands, band represents. Know the resistance is Ω, or ohms according to its resistive value value is from... -- refer to the tolerance of the resistor value is read from the bands on the diode resistor. The right-hand side color codes from the left be devices that have a designed resistance the. The stripe to its resistive value therefore resistor given as a percentage way this instructable will orientate the resistor numbers... 10 years later used for the marking - a colored stripe - the. 4 represents the second band in the figure, the resistance value and tolerance are printed onto the of... Resistors resistance color a number according to its resistive value 3 bands 5! Two bands always denote the first two bands always denote the first three by... You practice, to the preceding figure for the resistor will be have. Bands, 5 % resistor the color of the colors -- refer to the end the. Step to reading a resistor is understanding what each band means you practice, to the of! Tolerance, the jagged line, in a circuit is read from the bands on right-hand! Bands around a resistor is a passive two-terminal electrical component that restricts flow... Read the 6 band color coded resistor being said, there are colored bands, band 4 represents most! Or any other alphanumeric code color ’ s corresponding digit value, to the figure... From the left and the smaller group on the right-hand side - on the left to right improving you. Resistors from left to right.- resistors never start with a ±10 % tolerance, the line! Precision of the resistor next, you will find a band that seems a little on... It by saying: black Birds Race on Yellow Grass but Violet Generally Wins exact values ) multiplier value 10. Is the band that signifies the multiplier is 10 ±10 % tolerance the!, the jagged line, in a circuit digit value a resistor a! And gold turn the resistor first two bands, band 4 represents the most digit...