Electronic components are the basic building blocks used in the design and construction of electronic circuits. These components can be classified into two broad categories: active and passive components.

Electronic Components

1. Voltage and Current Sources

| Vbattery Isource
—_12v 1A
T

2. Review: What is a Resistor?

Resistors — circuit component that resist (limits)
the flow of electrons in an electrical circuit.

3. 1st Digit 2nd Digit Multiplier Tolerance
a . . .

he their resistance value and tolerance shown by
colored bands.

Read the resistor bands from the left-hand side.

1% band is the one closest to one of the ends.

4% band will have either gold, silver, or no color.

4. Ast Digit 2nd Digit
1% band = 1* significant digit
21 El and significant digit
3d band = multiplier

4" band = tolerance

Multiplier
.

5. A

à

Question: Why do we u:
coding in a resistor?

Ans.: For easier identification.

6. 4 band color code resistor

Color 1* digit 2% digit | Multiplier Tolerance

| Orange 3 | 3 | 10? |

Yellow 4 4 10*

7. 1% band: orange 3
2" band: white 9
3 band: yellow 10,000

4% band: silver +/- 10%

Therefore:
39 X 10,000 = 39,000

39 kilo ohms +/- 10%

1% band: red 2

2" band: green 5

3" band: black 1

at" band: silver +/- 10%
Therefore:

25 X1= 39,000
25 ohms +/- 10%

8. From the resistor value:

39 KO +/- 10% 25 0 +/- 10%
The tolerance limits the The tolerance limits the
resistance to: resistance to:
Minimum value: Minimum value:
39 kQ - 10% = 35.1kQ 25 0 - 10% = 22.50
Maximum value: Maximum value:

39 kQ + 10% = 42.9 kQ 25 0 + 10% = 27.50

9. Question: W
have tolerance?

Ans.:
There is no perfect resistor with
an exact value.
Resistors are manufactured in
approximate values.

10. 4-Band-Code

2%, 5%, 10%

==
— ==

Black
Brown 11% (F)

.
Red = har +2% (6)
Orange z 1KQ

Yellow 10KQ

[Violet | 7 | 7 | 7 | toma | +0.10% (6) |

560k N +5%
E

+ 5%
+ 10%
J

ss | {NI = —
0.1%, 0.25%, 0.5%, 1% 2370 21%

5-Band-Code

(4)
(K)