Five Band Resistor Color Code-What Does The Last Band Of White
Color Represent?
In electronic repair, most of the time i came across five band
resistor color code. The purpose of using the five colour band
resistor in a circuit is that it provide a more accurate value
compare to the four color band. For example in order to get the
value of 22.6kohm, with four colors band resistor you will not
be able to find it. The most you can get is 22k (red,red,orange
and gold). If with the five color band you will be able to
calculate it (red,red,blue,red,brown)the last color which is
brown represent 1% tolerance. You may go to google search engine
and type resistor color code, resistor color coding, resistor
color code calculator, or resistor color code chart to know more
about how to calculate a five band resistor values.
If you open up an analog multimeter you will understand what i
mean. Most of the resistor circuit inside the multimeter are
using five color band. Why? Because the reading that you get
whenever you measure current, voltage or ohm, the panel will
show the nearest value. For instance, if you measure a 9v
battery the needle will point to may be 8.9v,9v,or 9.1 volt. If
that particular multimeter was designed using four color band
resistor the result that it gets may be 8.5v,9.5v or even 10
volt. In other words the use of five color band resistor is to
make a circuit more precise and output the desire result as what
the engineers want it to be.
There's a interesting five color band resistor which is unique.
In fact i have already seen quite a number of them. I will
reveal the calculation about this unique five color band
resistor. The colors are orange, orange, red, gold, white.
Actually it is a four color band resistor. Just ignore the white
color and proceed to calculate using the four color band
formula. As to why the resistor manufacturers add this 'extra'
white band i really do not know. However, from forum someone
said that it is for the military purposes. If you know the
answer i would like you to email me so that i can share with
other fellow electronic repairer thru this info repairing
newsletter.