Technical data

25
R
Res s
Pro
•
•
Items
- Di ital
- Re
nts, make sure there is no power applied to the circuit.
esistors
istor Color Code
ject Objective:
To provide a hands-on experience with the resistor color code.
To determine if the resistor is operating within its specified tolerance by using an ohmmeter to
measure its resistance.
Needed:
g multi-meter
sistors: 2 watt - 270k
1 watt - 6.2k
, 10M 1/2 watt - 11, 2k, 2.2k, 300k, 750k
1/4 watt - 150, 5.6k
1/8 watt - 1.2k, 39k 
When making resistance measureme
Experiment
_____________ 5 = ___________________________
______________ ___
= ___________________________
____________
7 = ___________________________
3 = ____ _______________________
_________________________
sed to represent 5% tolerance = ___________________________________
_______
3.
pe
that m
ith ller number by t
s the m
e end up with a percentage of the measured value to the g
1. List the 10 colors used in the resistor color code to represent the following numbers.
0 =
______________
1 = _________ _ 6
2 = ____ ___________
_______________________
8 = ____
4 = ___________________________ 9 = __
2. List the colors used in the resistor color code to represent the following tolerance levels.
The color u
The color used to represent 10% tolerance =
___________________________
How is a 20% tolerance represented? ______________________________________
Complete the table on the next page to determine if the resistors are operating within their
s cified tolerance ratings.
Example:
If we have a 1k resistor with a 5% tolerance easures 965 we can find if it is operating
in its tolerance rating by dividing the sma he larger number and subtracting w
from 100%. In this case the smaller number i easured value and the larger number is the
given (color code) value.
If we take 965Ω and divide by 1000Ω we get .965
W iven value. To find out if the
resistor is operating within its tolerance we need to subtract from 100% so we move the decimal
point two places.
100% – 96.5% = 3.5%