The document explains resistors, their function as passive components that create resistance in electric current, and includes details on color coding for resistor value calculation. It illustrates the importance of using resistors in circuits to prevent damage, particularly in LED applications, and provides examples of calculating resistance and current. Additionally, it references sources and further readings related to resistors and electrical components.

1. Prepared by
Jayson D. Dag-uman
Reading Resistor
TVL-EIM DEPARTMENT

2. At the end of the topic, you will able to:
1. Define Resistor
2. Calculate the value different resistor
3. Determine Resistor Color Coding Chart

3. Resistor

4. Resistor
A passive electrical
component to create
resistance in the flow of
electric current.

5. Resistor
Very common and are the
cheapest electronic
components in the market
for so many years. Their
features are so interesting
and are very colorful. That’s
why resistors are very
popular among students
studying electronics. Symbol

6. Resistor’s color coding and value

7. COLORS 1 ST BAND 2 ND BAND MULTIPLIER TOLERAN
CE
BLACK 0 1
BROWN 1 1 10
RED 2 2 100
ORANGE 3 3 1000
YELLOW 4 4 10000
GREEN 5 5 100000
BLUE 6 6 1000000
VIOLET 7 7 ______
GRAY 8 8 ______
WHITE 9 9 ______
GOLD ______ ______ 0.1 ± 5%
SILVER ______ ______ 0.01 ± 10 %
NO COLOR ______ ______ ______ ± 20%

8. Example
1 0 10
X ± 5%
10 X 10 = 100 OHMS ± 5%

9. Example
4 7 10000 ± 10%
47 x 10000 = 470,000 Ohms ± 10%
or 470K ohms ±10%
X

10. Application in Resistor
A simple circuit
compose of 20mA LED
and 9v Battery.
What will happen to the
circuit without resistor?

11. What have you observe
on the circuit?
The LED is busted/blast
due to high voltage and
the current is high.
Application in Resistor

12. Application in Resistor
The circuit should put
resistor to prevent
damage to LED.

13. Try this Resistor.
Color Coding
 Orange
 Black
 Brown
 Gold
Application in Resistor

14. 3
0
X10
± 5%

15. 3 0 X10 ± 5%
Resistance 300 ohms ± 5%

16. Resistance 300 ohms ± 5%
But the LED show there is a
problem (!)
Application in Resistor

17. It is said that the current
through the LED is 22.mA,
while recommended
maximum is 20mA. The
usable lifetime of the LED
may be reduced
Application in Resistor

18. Try another Resistor that
can carry the current
through LED.
Maximum is 20mA
Application in Resistor

19. Try this Resistor
Color Coding
 Orange
 Green
 Brown
 Gold
Application in Resistor

20. 3
5
X10
± 5%

21. 3 5 X10 ± 5%
Resistance 350 ohms ± 5%

22. Resistance 350 ohms ± 5%
Application in Resistor

23. Check how much the current using Ohms law.
Find Current :
R= 350 ; Volt = 9v ; I=?
I= V/R
I= 9/350
I= 0.025A
To Get the millamperes multiply by 100
I= 25 mA
Application in Resistor

24. How do Resistor works?
Therefore
The current of the circuit is 25mA and the
maximum of the LED is 20mA

25. REFERENCE
Contents
• Ausgrid, Types of Meter, July 8, 2020
https://www.ausgrid.com.au/Your-energy-use/Meters/T
ype-of-meters
Images
▪ Types of Meter, July 8. 2020,
https://bit.ly/3f9JpFr
▪ Types of Meter, July 8. 2020,
https://bit.ly/2ZcBpy1
▪ Types of Meter, July 8. 2020
https://bit.ly/3fm5YqF
• Types of Meter, July 8. 2020
• https://bit.ly/2ZNHpvZ