Activity 1.1.4 Component Identification: Analog
Introduction
In the field of electronics, there are an endless number of different types of components. The
ability to identify these components and to understand how they are labeled is an essential
skill for anyone working in the field.
In this activity you will identify and determine the nominal values for a series of resistors and
capacitors. We will concentrate on resistors and capacitors because they are part of virtually
every electronics design ever made.
Equipment
Scientific calculator
Digital multimeter (DMM)
Resistors
Capacitors
Resources
Activity 1.1.4 Component Identification: Analog – Answer Sheet
Introduction to Resistors and Capacitors
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.
(Yellow / Violet / Red / Gold)
a) Ra = 4700Ω = 4.7kΩ ± 5%
(Green / Blue / Yellow / Gold)
b) Rb = 560000 = 560k
(Red / Violet / Brown / Gold)
c) Rc = 270Ω
(Brown / Red / Green / Gold)
d) Rd = 1200000 = 1.2M Ω
(Blue / Gray / Orange / Gold)
e) Re = 68000 = 68k
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.
Tolerance Range
Resistor
Colors
Nominal
Value
Minimum
Accepted
Value
Maximum
Accepted
Value
Measured
Value
Meets
Tolerance?
1
2
3
4
5
6
7
8
9
10
3. Use the attached Disc Capacitor Label Diagram to determine the nominal capacitance
value for the following components.
a) Ca = 47000pF
b) Cb = 470uF
c) Cc = 220000pF
d) Cd = 0.1uF
e) Ce = 1000pF
Resistor Color Code Diagram
Disc Capacitor Label Diagram
Conclusion
1. Why are the measured values of the resistors different from the nominal values?
The manufacturing of resistors, manufacturing adds some resistance.
2. Identify each of the circled components for the printed circuit board shown
below.
A. Axial lead
B. voltage regulator
C. Tantalum capacitor
D. fuse
E. Green LED
F. Ceramic disc capacitor