Resistor color code

How can i find a resistor value from the resistor colour code?

The resistor values are easy to measure with a multimeter. You can observe that they have several coloured stripes on thems. There is a color code hidden in these stripes that helps us to detect the resistor value without the use of a multimeter.

Resistor color code – Colour code

Take a look to the table below that has the corresponding values in each colour. The table is detailed, but if in any case you need some further explanation drop me a comment.

Resistor colour Values – Colour code ** It is valid only to resistors with 5 or 6 stripes

Start reading the stripes from the one that is closer to the edge of resistor component (see the arrow at above picture).

If you are at the proccesss of learning, try to decode the resistor value from the color code and then use a multimeter to verify the value you came up with.

What types of resistors we have?

4 stripe resistor

The 4 stripe resistors are the most common we meet. They have two stripes for the resistor value, one stripe for the multiplier and one for torelance.

If there is no stripe for tolerance, there for 3 stripes, the resistor value is the same as if they where four stripes with a default 20% tolerance.

Αντίσταση 4,7ΚΩ με 4 λωρίδες

Seeing the top image, we notice a yellow stripe and a purple stripe for the resistor value, a red one for the multiplier and a gold for the tolerance.

  • Yellow: 4
  • Purple: 7
  • Red X100
  • Gold: +-5%

Putting them up all together 47X100 = 4700Ω with +-5% tolerance

5 stripe resistor

Resistors with 5 stripes are usually used when we need more accuracy in resistor values.

Instead of using two stripes for the value, we use three. One stripe is for the multiplier and one for tolerance.

Resistor 475ΜΩ +-5% with 5 stripesς

From the image above you notice that we have 5 stripe resistor. First three stripes are for the resistor value (Yellow(4), Purple(7), Green(5)), the blue(x1MΩ) stripe is the multiplier.

The gold stripe at the end is tolerance (+-5%). Be aware of the fifth stripe because in some cases it does mean tolerance. For more information, chech the table at the beginning of this post.

  • Yellow: 4
  • Purple: 7
  • Green: 5
  • Blue: X 1M
  • Gold: +-5%

6 stripe resistors

Resistors with 6 stripes have the same meaning with those who have 5 stripes. The extra stripe is for the temparature (ppm/K).

Resistor 4.25GΩ 0.25% 25ppm
  • Yellow: 4
  • Red: 7
  • Green: 5
  • Purple: X10ΜΩ
  • Blue: -+0,25%
  • Yellow: 25ppm

Resistors are a basic component for our electronic projects and for our Arduino tutorials.

November 5, 2019

0 responses on "Resistor color code"

    Leave a Message

    Your email address will not be published. Required fields are marked *

    Σχεδιασμός © GetCert. Με επιφύλαξη παντός δικαιώματος.