No matter how it is installed, Maintenance staff can easily read … 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. If this stripe is on the right side of the resistor, turn the resistor around so the first stripe is on the left. Next, you will find a band that signifies the multiplier, which indicates the decimal count. How to read color code of resistor Must Read What is 555 Timer. 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. The number of color bands on a resistor varies from three to six. And the last color: This is tolerance. 4 band resistor: A-572, Block 7 Gulistan-e-Johar, Karachi, Sindh 75290. 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". 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. This also assumes that this is a 5 band color code 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. 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. * 3rd digit - only for 5-band resistors. There are also 4 and 6 band color code resistors. These code must not be confused with the 25 pair color code, is used to identify wires in certain devices. This also assumes that this is a 5 band color code resistor. 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Refer to the preceding figure for the color code for the tolerance of a resistor. The first two bands always denote the first two digits of the resistance value in ohms. Thanks for sharing your knowledge. 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). Read the colors from left to right. Early 3 colour resistors are read in the following order: Look for the marking - a colored stripe - on the diode or resistor that indicates which way the current flows. In this article, we will cover “How to Read Resistor Values”. The fifth band represents the tolerance of the resistor. The resistor value is read from the left to right. Hold the resistor with these grouped bands to your left. A resistor with color bands is the most widely used type of resistor in various electronic equipment. Look at … Make sure to read the value of the right-most color band to determine the tolerance of the resistor. Then, jot down the sequence of the colored bands, reading from left to right. Resistors are available in a range of different resistance values from one Ohm ( Ω ) to millions of Ohms. 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. On the DIY world (“Do It Yourself”), knowing how to read resistor values is essential. This guide will not be explaining how to read the 6 band color coded resistor. 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). To read an axial lead resistor, hold the resistor so the gold or silver band is facing to the right. Select the color codes from the bands on the resistor. Band 2 represents the second most significant digit of the resistor. 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. The units used for the resistance is Ω, or ohms. This is to allow for any errors within the resistors resistance. For example: If the resistor is a 110kΩ with a ±10% tolerance, the actual resistance could range from 99-121kΩ. The first stripe is the one that’s closest to one end of the resistor. In electronic circuits, resistors are defined to be devices that have a designed resistance against the passage of an electrical current. But in most small resistors with a power rating up to one watt, the resistance value and tolerance are often indicated with color bands. 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. 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