Ignore the colour of the
resistor body.
Most resistors have
three coloured bands
close together at one
end and one single band
at the other.
The three adjacent band
give the resistor value. The band nearest the
wire lead gives the
value of the first
digit. e.g Brown = 1.
The next band gives
the value of the next
digit e.g. red =
2.
The third band gives the
number of zeros which
follows the two
digits.e.g. orange = 3
zeros = 000.
Therefore a resistor
with brown, red, orange
bands would have a value
of 12000 ohms.
This resistor has a
value of 2,700,000 ohms.A green blue black
resistor would be 56
ohms. (black indicates
that there are no
zeros).
Black = 0 Brown = 1 Red = 2 Orange = 3 Yellow = 4 Green = 5 Blue = 6 Violet = 7 Grey = 8 White = 9
If the third band is
silver then divide the
value of the first two
digits by 100, if gold
divide by 10. e.g. red violet gold is
2.7 ohms.
The fourth band
indicates the tolerance. e.g. brown indicates
plus or minus 1%. a 100 ohm 1% resistor
can be in value between
99 ohms and 101 ohms.
brown 1% red 2% gold 5% silver 10%
none 20%
If there is a fifth pink
band this indicates a
high stability resistor. |