SMD stands for Surface Mounted Device. Find here how to read the resistor SMD code and what the standard sizes are. Warning in case errors in determining the color of bands. Electronics Tutorial about Types of Resistor and the Different Resistor Types available including Carbon, Film, Composition and Wirewound Resistors 4 band resistor. More online conversion calculators at Digi-Key. Circuit symbols and V-I graph of all types are explained in detail. Colors are assigned to all the numbers between 0 and 9, and the color bands basically translate the numbers into a visible code. These resistors have two bands for the resistance value, one multiplier and one tolerance band. Every color is different number and you can remember these numbers or you can just use the table on next step. So, for example, if a resistor has brown and red as the first two bands, the most significant digits will be 1 and 2 (12). 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. By using the color code chart, one finds that green stands for 5 and blue for 6. Color code is used commonly for resistors but also for other components like capacitors, inductors etc. Electronics Tutorial about Types of Resistor and the Different Resistor Types available including Carbon, Film, Composition and Wirewound Resistors Count the number of color bands on the resistor. 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 four band color code is the most common variation. I have a Eng. Resistor Color Codes: Resistors are devices that limit current flow and provide a voltage drop in electrical circuits. that is trying to use color coding different to what I was always told to use as the standard. My question here is not the resistance, but how to know which side to start on when reading a resistor's color code. Resistivity depends upon conductor to conductor. For those in the electronics business that are color blind (as I am), working with resistors and color coded capacitors can be difficult. Resistor Color Code Calculator decodes value and tolerance of 4 and 5 band resistors. However it's your decision ,and I will show you all ways to calculate resistor value. I have a Eng. Some have less resistivity which is good Find the tolerance band, it will typically be gold ( + /-5% Tolerance) and sometimes silver (+/-10%). In the case of resistors the colour code method is predominant. Every color is different number and you can remember these numbers or you can just use the table on next step. The Resistor Color Code Calculator decodes and identifies a value and tolerance of 4 band wire wound resistors. A Resistor Color code is color bands to indicate the value of resistance of a resistor. It's for the laziest people :D . Colors Here is the How to Read the Code. Say that the fourth band of the 470 Omega resistor you have chosen for a particular project is gold. For operational and other information, and for those unable to use the calculator because of browser limitations, there is a resistor color code chart below the calculator and additional information below the table.