Note: On all of the colour-coded resistors,
the band at one end will be spaced further apart than the others;
the resistor should be viewed with this band to the right to
correspond with the chart and examples.
Reading from the left, bands 1 & 2 are the significant
digits [1st green = 5, 2nd blue = 6]. Band 3 is the multiplier
[orange = x1000]. Therefore the value of our example is 56 x
1000 ohms or 56k. The 4th band indicates the Tolerance [gold
= ±5%].
Reading from the left, bands 1, 2 &
3 are the significant digits [1st yellow = 4, 2nd violet = 7,
3rd black = 0]. Band 4 is the multiplier [red = x100]. Therefore
the value of our example is 470 x 100 ohms or 47k. The 5th band
indicates the Tolerance [brown = ±1%].
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Resistors
resist the flow of electricity and are very useful in supplying
desired voltages to other electronic omponents. The resistance
of a resistor is measured in Ohms ().
Please note that our Min Res resistors are usually
supplied with the 4-Band Code, but with an additional red band
to indicate the 50ppm temperature coefficient after the brown
1% tolerance band. This additional band prevents the code being
read backwards accidentally, since no value begins red, brown
(21—), in the event that the extra large space between the third
and fourth bands is hard to identify.
Most resistors are so small that it is
impossible to print their values on them using normal numbers.
Instead they are marked with a code of coloured bands. Resistors
with a tolerance of 5% and 10% are marked with 4 bands, while
higher precision types, such as 2%, 1% and better, may be marked
with 5 bands to allow for an extra digit of precision. |
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