Procedure
1.
Using the attached resistor color code, determine the nominal resistance
value for the following components. Express your answers using the proper SI
units and prefix.
a)
R​a​ = 4.7k Ω
b)
R​b​ = 560kΩ +5%
c)
R​c​ = 2.7kΩ + 5%
d)
R​d​ = 1.2mΩ +5%
e)
R​e​ = 68kΩ +5%
2.
Obtain 10 random resistors from your instructor. Using the Resistor Color
Code Diagram, record each resistors nominal value and tolerance range. Next,
use a digital multi-meter (DMM) to measure and record the actual resistance
value of each resistor. Finally, indicate if the measured value is within
acceptable tolerance.
Resist
or
Colors
Nominal
Tolerance Range
Value
Minimum
Accepted
Value
Maximum
Accepted
Value
1
Red, Black, Red,
Gold
2kΩ
1,900
2,100
2
Red, Green, Orange,
Gold
25k​Ω
23,750
26,250
3
Brown, Green,
Orange, White
15kΩ
12,000
18,000
4
Green, Black, Brown,
Silver
0.5kΩ
450
550
Measur
ed
Value
Meets
Toleranc
e?
5
Violet,Red,Blue,Whit
e
72mΩ
57,600,00
0
86,400,000
6
Orange,Black,Yellow
,White
300kΩ
240,000
360,000
7
Blue,Orange,Red,Sil
ver
6.3kΩ
5670
6930
8
Brown,Black,Red,Go
ld
1kΩ
950
1050
9
Yellow,Green,Blue,W
hite
45mΩ
36,000,00
0
54,000,000
10
Gray,Brown,Orange,
Silver
81kΩ
72900
89100
3.
Use the attached Disc Capacitor Label Diagram to determine the nominal
capacitance value for the following components.
a)
C​a​ = 47000pf+ -20% +80%
b)
C​b​ =0.47 pF+1%
c)
C​c​ = 220000pf+10%
d)
C​d​ = 0.1pf+1%
e)
C​e​ = 1000pf
Conclusion
1.
Why are the measured values of the resistors different from the nominal
values?
​ esistors are described by their nominal values, but the measured value
R
may be different depending on the resistor’s tolerance.
2.
Identify each of the circled components for the printed circuit board shown
below.
A. Capacitor
B. Diode
C. 16 Pin DIP IC
D. Resistor
E. LED
F. Disk Capacitor