It is simply a measurement of the imperfections. The temperature coefficient is more commonly marked, especially on quality 5-band resistors, as it starts to become an important factor for precision components.
This is a necessary step especially with five and six banded metal film resistors. How do I make certain what the value of the resistor really is? Also, the markings would easily rub off or become smeared with time. Reading the resistor from left to right, the first two color bands represent significant digitsthe third band represents the decimal multiplier, and the fourth band represents the tolerance.
Occasionally the colors are jumbled or burnt off. The Gold or Silver band is always set to the right, then you read from left to right. Although the program was tested rigorously, it still may have a few bugs.
Once again, follow the line down to the bar scale; it holds a value of 3. Resistors are devices that limit current flow and provide a voltage drop in electrical circuits.
That is the number that the resistor may go either way. Resistors are color-coded for easy reading. Write this number next to the first digit. E12 and E24 series. When looking at the chart, note the illustration of three round resistors with numerous color code bands.
The most common values for this band are presented in the color chart above. This stripe is found primarily on 4-band resistors made for military applications and seldom used in commercial electronics.
The reliability band specifies the failure rate per hours assuming that a full wattage being applied to the resistor. Therefore manufacturers place a tolerance color band on the resistor to tell you just how accurate this resistor is made.
Once again, follow the line down to the bar scale; it holds a value of 0, our second significant digit. A 1,Ohm resistor with a gold band maybe any value between to Ohms.
This represents 3 multiples of 10 or This becomes our first significant digit. The resistance value could be stamped or painted on the body of the through-hole resistor, no?
Match this third color band with the chart -- this time looking at the row of multiplier numbers. E12 and E24 series. If the multiplier band is gold or silver, then the decimal point is moved to the left one or two places divided by 10 or Thus, the permissible range is: Tolerance Explained Resistors are never the exact value that the color codes indicate.
With this information, the resistance is determined by taking the first two digits, 1 and 0 10 and multiplying by 1, The color of the multiplier band represents multiples of 10, or the placement of the decimal point.
The third resistor a 6-band provides even more information. This maybe difficult on small or oddly colored resistors. Optional band A few resistors have an additional band - often giving beginners a bit of trouble - indicating either the reliability or the temperature coefficient.
How to Read the Code 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.Our Resistor Color Code Calculator is a handy tool for reading carbon-composition resistors whether it's a 4-band, 5-band or 6-band type.
To use this tool, simply click on a particular color and number and watch how the actual bands. Conversion Calculators > 5 Band Resistor Color Code. 5 Band Resistor Color Code Calculator. About: This tool is used to decode information for color banded axial lead resistors. Select the number of bands, then their colors to determine the value and tolerance of the resistors or view all resistors Digi-Key has to offer.
Resistors using these codes have a series of colored bands. Each band has a choice of ten colors which are coded to read 0–9 for that color. Read the bands, write down the numbers.
The first two bands are significant and the third band is a power. 3, 4 and 5 band (value to color code and color bands to value) resistor color code calculator.
Color Code for Resistors The Engineer posted on October 20, | Carbon-composition and carbon film resistors are too small to have the resistance value printed on their housings. Therefore, bands of color are used to represent the resistance value.
RESISTOR COLOR CODE SYSTEM Resistor color coding system applies to carbon film resistors, metal oxide film resistors, fusible resistors, bands closest to one end of the resistor are used to determine the resistance.
The fourth (fifth) color, here it is red so write down a 2 next to the two. (you should have '22' so far.) Now read the third.Download