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 matter what its size or condition. This standard describes color coding for axially leaded resistors and numeric code for smd resistors. Resistor color code chart and resistance calculator west. Generally on larger power resistors, the resistor colour code systems is not required as the resistance value, tolerance, and even the power wattage rating are printed onto the actual body of the resistor instead of using the resistor colour code system. Pdf use of histogram approach in color band detection for. Use the resistor color code chart below to understand how to use the color code system. This tool is used to decode information for color banded axial lead resistors. In this paper, a novel approach has been applied to detect the resistors with color code recognition. The resistor color code calculator decodes and identifies a value and tolerance of 4 band wire wound resistors. Colorcoding is standardized by the electronic industries association eia. Resistor color coding system applies to carbon film resistors, metal oxide film resistors, fusible resistors, precision metal film resistors, and wirewound resistors. Resistor color code system how to read the resistor code. 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.
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. Resistance resistor color code band 1 band 2 band 3. Pdf understanding retinal color coding from first principles. There are several bands to specify the value of resistance. Learn more about resistors and resistor color codes. This system was employed for resistors when the surface area was not sufficient to print the resistance value for the past time. Using your prototype board, now create a fourresistor circuit by joining the. Lake county department of utilities pipe colorcoding standard all sites raw water plant influentsettled water olive green w blue bandpotable water. Resistor color code chart handout pdf teach engineering. Understanding retinal color coding from first principles. 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. How to calculate resistance value of resistor using color. Resistor colour code and resistor tolerances explained. The use of color bands on the body of a resistor is the most common system for indicating the value of a resistor.
Be able to calculate the equivalent resistance of series and parallel resistor circuits. An investigation into the recognition methodology has been. Resistor color code is used to indicate the value of resistance. Determine the nominal values of resistors by using the color codes. Using the fiveband code, indicate the colors of the bands for each of the following resistors. The resistance value will be calculated and shown along with the minimum and maximum values. 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. The standards for color coding registers are defined in international standards iec 60062. The use of color bands on the body of a resistor is. Because carbon resistors are physically small, they are colorcoded to identify their resistance value in ohms. What is the value of the electrical resistance of the resistor with color rings as follows.
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