![]() ![]() ![]() Note that there are only 24 values in each decade - and you probably already know most values. As a teenager, my first breakthrough came when I picked up a resistor and said to myself: “this is a 1K resistor because it looks like one I was using in another circuit and I remember its value.” Wow, what a concept! The other values fell into place quickly. Yes, I learned the numbers for the colors - simply in the order of the colors of the rainbow, but actually reading the color code is something that I did not really study and I suspect that most others learned the same way. Reading resistor color codes = pattern recognition I had to agree with him - that device was a real “sleeper.” Since then, I have run across a few with off color banding that made me confuse **K devices with **10K devices and vice-versa.įortunately, for the color vision impaired there is a solution… it is called a DMM. He then explained that he was color blind and the different shades of grey appeared confusing so he could not reconcile the banding with the ohmmeter reading. Then one day, he asked me to identify a certain resistor - it was a 2.2K resistor with 2 or 3 shades of red. I just assumed that he was just being careful (certainly more careful than I…). I once worked with an engineer that often checked his resistors with a multimeter before use. This is perhaps the best color code calculator online - simply COOL!ĭigiKey online Color Code Resistance Calculator See photo of non-banded precision resistor to see what you think… The TCR is measured in ppm/☌ units.Resistor Color Codes, Chart, Resistance CalculatorĬircular banded components are visible from all directions and angles while printed text is rarely visible and often requires magnification to read. The final band represents the temperature coefficient of resistance (TCR), which is the change in resistance per unit resistance as the temperature changes by 1 degree C. The third band is the multiplier and the fourth band is the tolerance.įor 5-band resistors, the first three bands represent the first three significant digits of resistance, followed by the multiplier band, which is then followed by the tolerance band.įinally, for 6-band resistors, the first three bands represent the three digits of resistance, followed by the multiplier band, then followed by the tolerance band. While a fourth band, tolerance, is not available, the tolerance is always ☒0%.įor 4-band resistors, the first two bands represent the first two significant digits of resistance. In 3-band resistors, the first two bands represent the first two significant digits of the resistance value in Ohms. Gold or silver bands are always located at the right-most end as they are only used for multiplier and tolerance bands. The bands are read from left to right, with the tolerance band being often printed at a wider gap from the other bands to distinguish reading direction. Resistors are painted with three to six bands which indicate resistance, tolerance, and sometimes the temperature coefficient of resistance. This resistor color code calculator is designed to help identify and calculate values on your resistors. Many resistors have color-coded bands which identify varying resistance values and tolerances. Circuit design engineers can use resistors to control both the voltage and amperage at a particular point in a circuit. To prevent damage to sensitive components from a voltage overload, a resistor can be used in series with that component, creating a voltage drop and protecting the component from harm. A resistor is an electrical component regulating the flow of current in a circuit. ![]()
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