How to read colour codes from resistors

The value of the resistor is marked on
the body using colors. Every color is
different number and you can
remember these numbers or you can
just use the table on next step. OR there
are much resistor calculators that you
can use. It's for the laziest people :D .
However it's your decision ,and I will
show you all ways to calculate resistor
value.

COLOURS
Here is the table with the colors and
numbers. As you can see they are:
BLACK: 0
BROWN: 1
RED:           2
ORANGE: 3
YELLOW: 4
GREEN:       5
BLUE: 6
VIOLET:      7
GREY: 8
WHITE: 9
But this is not for all colors. From right
to left the second color is multiplier.
Digits from the first colors must be
multiplied with the number of this color.
BLACK: 1
BROWN: 10
RED:           100
ORANGE: 1000
YELLOW: 10000
GREEN:       100000
BLUE: 1000000
GOLD: 0.1
SILVER: 0.01

And the last color: This is tolerance.
Tolerance is the precision of the
resistor and it is given as a percentage.
For example a 390 resistor with a
tolerance of ±10% will have a value
within 10% of 390, between 390 - 39 =
351 and 390 + 39 = 429 (39 is 10% of
390).

BROWN: 1%
RED: 2%
GOLD: 5%
SILVER: 10%
NOTHING: 20%

CALCULATOR
Resistor color code calculator
If you are too lazy to think about colors
and digits and mat ... this is for
you :) :D
Examples
Exemple: If first color is RED ,second is
RED ,third is BLACK and the last is
SILVER it means:
RED - 2 -- RED - 2 -- YELLOW -
x10000 -- SILVER - 10% so...
2 2 0000 +/- 10% * 2 2 0000
so... :D
220000 +/- 22000
This is 220 000 Ohm or 220 kOhm
or 220 000 - 22 000 Ohm or 220 - 22
kOhm
or 220 000 + 22 000 Ohm or 220 + 22
kOhm
Hope you got it :)

Comments

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