Data Sheet
-91-
180. High Accuracy Resistors
Build the circuit shown on the left and turn on the switch (62). Press
the press switch (61) and you will see the star LED (70) and colorful
LED (72) light. Release the press switch (61) and the star LED (70)
and colorful LED (72) will stay bright briey and then turn dim. Although
most resistors use red, silver, or gold as the 4th band, there are other
colors that may appear as the 4th band for higher accuracy resistors.
See the table below for all the possible 4th band color markings.
181. 5-Band Resistors
Replace the 1kW resistor (42) in project #180 with the 5.1kW resistor
(43) and turn on the switch (62). Press the press switch (61) and you
will see the star LED (70) and colorful LED (72) light. Release the press
switch (61) and the star LED (70) and colorful LED (72) will stay bright
for a little while and then turn dim. When high accuracy is needed
for resistor values, it can become important to specify more than the
rst two signicant digits. Because of this, 5-band resistors have been
introduced that provide a 3rd signicant digit. See the gure below. This
would be a 316*102 = 31,600W resistor that would be accurate to
within 1% (31,284W to 31,916W).
Color Tolerance
Black N/A
Brown 1%
Red 2%
Orange N/A
Yellow N/A
Green 0.50%
Blue 0.25%
Violet 0.10%
Gray 0.05%
White N/A
Silver 5%
Gold 10%
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