Resistor Color Coding Explained

Resistor Color Coding Explained


Hey friends, Welcome to the YouTube channel
ALL ABOUT ELECTRONICS. So, in the previous video, we have seen the
different types of resistors. Now, the value of this resistor is usually
defined using the color codes. And in fact, you might have observed the different
color bands painted on the resistor. So, now let’s find out in this video, how
to find the value of this resistor from this color codes. Now, the commercially available resistors
can have either 4, 5 or 6 bands. And depending upon the number of color bands,
these resistors are known as either 4-band, 5-band or 6-band resistors. So, now first of all, let’s find out how to
find the value of this 4-band resistors. So, if you see any 4-band resistor, then you
will find the 4 color bands. And out of the 4 color bands, the first 2
bands defines the first two digits of the value of the resistor. Then the third band defines the multiplying
factor for this resistor. And the fourth band defiens the tolerance
value for the resistor. Now, depending upon the color of this color
band, the value of this resistor will change. So, now let’s find out the relationship between
the color and the value that is represented by that particular color. So, here is the table which defines the relationship
between the different colors and the value that is represented by that particular color. So, as you can see over here, the first two
columns of this table defines the first two color band of this resistor. And depending upon the color of this color
bands, the value that is represented by these two digits will change. Similarly, the next two columns define the
multiplying factor as well as the tolerance value for this resistor. And depending upon the color of this color
bands these two parameters will also change. So, let’s take one example so that it will
get clear to you. So, here we have one 4 band resistor. And if you observe over here, the first two
color bands of this resistor are Red and Black respectively. So, this Red color band represents the value
of two, while this Black color band represents the value of zero. Similarly over here, the third color band
is of Green color. So, it represents the multiplying factor of
10 to the power 5. And the fourth band or the tolerance band
over is of Silver color. So, it represents the tolerance value of 10
percent. So, now if you combine all these four values,
then you will get the value of this resistor as 20 times 10 to the power 5. And with tolerance we can represent the value
of this resistor as 2 Mega Ohm plus-minus 10 percent of tolerance. So, in this way, using this color bands, we
can find the value of this resistor. So, let’s take one more example, and let’s
find out the value of the resistor for that given color band. So, if you observe this resistor, the first
two color band of this resistor are Brown and Black respectively. So, this Brown color bnad represents the value
of one. While the
Black color band represents the value of zero. Similarly over here, the third color band
is of Red color. So, it represents the multiplying factor of
10 to the power 2. While here the fourth band or the tolerance
band is of Gold color. So, it represents the tolerance value of 5
percent. So, let’s once again combine all these four
values and let’s find out the value of the resistor. So, if we combine all these four different
values, then the value of the resistor will be equal to 10 times 10 to the power 2 Ohm,
that is equal to 1 Kilo-Ohm. And if we include the tolerance then we can
say that the value of the resistor will be equal to 1 Kilo-Ohm plus-minus 5 percent. Now, sometimes in this four band ressitor
you might find that the fourth band or the tolerance band is missing. So, in that case, it represents the tolerance
value of 20 percent. So, for the given example, if the fourth band
is missing, the the value of the resistor R will be equal to 1 Kilo-Ohm. And because there is no tolerance band, it
represents the tolerance value of 20 percent. So, the value of the resistor R will be equal
to 1 Kilo-Ohm with the tolerance value of 20 percent. So, similarly now let’s find out, how to find the
value of the resistor in case when it has five color bands. So, in case of this 5- band resistor, the
first 3 color band defiens the first three digits of the value of the resistor. And the fourth band defines the multiplying
factor for this resistor. And the fifth band defines the tolerance value
for this resistor. So, here is the table for this 5-band ressitor
which defines the value of each digit as well as the multiplying factor and the tolerance
value depending upon the color of these color bands. So, let’s take one example of this 5-Band
resistor, and let’s find out the value of that 5- band resistor. So, here we have one 5-band resistor, and
for this 5-band resistor the first color band is of Red color. So, it defines the value of 2. Similarly, the second color band of this resistor
is of Black color. So, it defines the value of zero. And likewise, the third color band of this
resistor is of green color. So, it represents the value of 5. So, here the fourth color band is of Orange
color. and it defines the multiplying factor of 10
to the power 3. Now, the last band or the fifth band defines
the tolerance value for this resistor. And it is of Silver color. So, represents the tolerance value of 10 percent. So, if we combine all these different values,
then the total value of this resistor will be equal to 205 times 10 to the power 3. And with tolerance, we can say that the value
of this resistor R will be equal to 205 Kilo-Ohm, with tolerance value of 10 percent. So, in this way, we can find the value of
this resistor in case of this 5-band resistor. Now, usually these 5-band resistors are used
when we require the more accuarcy. So, similarly now let’s find out how to find
the value of the resistor in case it has 6 color bands. So, these 6-band resistors are not generally
used in general purpose applications. But they are used for specific applications
and in military applications. So, in this 6-band resistor, the first three
color band defines the first three digit of the value of the resistor. And then the fourth band represnts the multiplying
factor for this resistor. Then here the fifth band represents the tolerance
value for the resistor. And then the last color band defines the temperature
coefficient of resistance for the resistor. So, here is the table from which we can find
the value of the individual digits as well as the value of the multiplying factor. So, depending upon the color of the color
band, we can find teh value of the individual digits. And from the last two columns, we can find
the value of the tolerance as well as the temperature coefficient of the resistance
for the given resistor. So, let’s take one example and let’s find
out how to find the value of this 6 band resistor. So, here we have one 6-band resistor. And if you observe this resistor, here the
first band of this resistor is of Orange color. So, basically it defiens the value of 3. Then if we move to the next color band then
it is of Yellow color. So, it defines the value of 4. Likewise, the third color band over here is
of Green color. And it defines the value of 5. Now, if we move to the next color band, it
is of Brown color. And it defines the multiplying factor of 10. So, form this we can say that the value of
the resistor is equal to 345 into 10 to the power 1. So, if we move to the next color band, from
this we can find the value of the tolerance. And over here the fifth color band is of Violet
color. So, it represents the tolerance value of 0.1
percent. And then if we move to the last color band,
then it is of Brown color. So, it defines that the temperature coefficient
of resistance for the given resistor is 100 ppm /K .
So, now let’s combine the individual values and from this let’s find the value of the
resistor. So, if we combine all these values then we
can say that the value this resistor R is equal to 3.45 Kilo-Ohm with tolerance of 0.1 percent. And the temperature co-efficient of resistance
for the given resistor is 100 ppm /K. So, in this way, we can find the value of
the resistor in case it has 6 color bands. So, I hope in this video you understood how
to find the value of the resistor from the given color bands. So, if you have any questions or suggestions,
do let me know in the comment section below. If you like this video, hit the like button
and subscribe to the channel for more such videos.

18 thoughts on “Resistor Color Coding Explained”

  1. ALL ABOUT ELECTRONICS

    The timestamps for the different topics covered in the video is given below:

    0:50 4-Band Resistor Color Code (with Examples)

    4:01 3-Band Resistor

    4:31 5-Band Resistor Color Code (with Example)

    6:25 6-Band Resistor Color Code (with Example)

  2. बहुत सरल और स्पष्ट उदाहरण .. इस तरह की एक आदर्श प्रस्तुति देने के लिए धन्यवाद!!

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