Resistor color code

This topic contains 4 replies, has 2 voices, and was last updated by  Jacob Reyes 6 months, 1 week ago.

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  • #9063

    Jacob Reyes
    Participant

    Hi how do you read resistor color codes?


  • #9064
    John C
    John C
    Galco Representative

    Hello Jacob, good question.

    Usually the color bands are printed closer to 1 end of the resistor than the other. This is the band you start with.
    Black=0
    Brown=1
    Red=2
    Orange=3
    Yellow=4
    Green=5
    Blue=6
    Violet=7
    Grey=8
    White=9

    First 2 bands are just digits (integers), 3rd band is the multiplier, then there is usually a tolerance band Silver=10%, gold=5%.
    So these are 1 type of color codes, but precision resistors have 5 bands. The first 3 bands are integers, 4th is a multiplier and 5th is the tolerance brown=1%, red=2%.
    This help?


  • #9066

    Jacob Reyes
    Participant

    Yes John, this helps very much, but how do you use this multiplier band?


  • #9067
    John C
    John C
    Galco Representative

    Oh piece of cake, all you do is add ZEROs to the integer value.
    EXAMPLE 1; Brown Green Brown silver
    1 5 0
    150 ohms at 10% tolerance

    EXAMPLE 2; Yellow Violet Orange Gold
    4 7 000 5%
    47,000 ohms (or 47Kohm)at 5% tolerance

    EXAMPLE 3; Brown Green Black Silver
    1 5 10%
    15 ohms at 10% tolerance

    Notice in example 3 that with a black multiplier band you don’t have any zeros. So the the integer value is the resistance value.
    Better?


  • #9068

    Jacob Reyes
    Participant

    Yes thank you John


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