How do you identify a resistors value if you don’t have a multimeter available?

Each resistor has a band of colors. These bands identify the value in Ω as well as the tolerance (change in value) of the resistor.

To complicate things, resistors have different numbers of bands. The table below describes the bands and how to calculate the reis


Digi-Key have a useful website that allows you to enter the colors and it will calculate the value for you.

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