# Inverter 12V to 220V 100W by Transistor

This circuit is 100 watt power inverter using power transistor 2N3055. It is designed for you that need to use appliances at outdoor or no electrical places. Someone use it in car or the high mountain etc.

The maximum output power of this circuit about 100 watts, it is suitable for a normal lighting (all home lamps), also used for radio, mini TV, stereo or someone use it for
How it works
From the schematic diagram in Figure 1 this circuit will include of 4 main section are:
1. The transistors Q1,Q2 act as the frequency oscillator circuit.
2. Both transistors Q3,Q4 act as the frequency divider circuit
3. The Q5,Q6 act as the driver circuit.
4. The Q7,Q8 act as the output circuit.

Let’s look at to both transistors Q1,Q2 will be connected together as the astable multivibrator form. It will generate the output frequency about 100 Hz at the collector lead of Q2. Then this signal will sent to the two frequency divider makes the frequency is reduced down about 50Hz

Cause we don’t design the circuit to directly work at 50 Hz. Because the generating the steady low frequency is very hard.

The output from divider circuit is sent to base of Q5,Q6. To increase current up to drive the output transistors Q7,Q8, then drive the transformer, finally to supply load.
Note:
1. Normally, use the 2-3A transformers for 20-30watt for the incandescent lamp. But use need 100watt use must use 8A transformer so expensive for me.
2. The primary coil of transformer use may use 9V CT 9V or 10V ct 10V or 12V ct 12V.
Which normal I use 12V ct 12V makes the output voltage about AC 220V (no load). But there is load voltage will reduce to AC190V
3.This circuit will has output as square wave form. So cannot use for inductor load.
4. This transformer, we may use secondary coil is the output voltage as you need, example we connects to the power amplifier that use AC 24 volts so we use AC 24V secondary coil etc.

How to builds.
It is like all our projects. To begin with make the PCB or you can use the universal PCB. Then, assemble all part on PCB as Figure 2. Next check all for error. Check again and check again.

Then apply the 12V 10A battery to this circuit and use the voltmeter to measure AC voltage output. Next connects load to the circuit.

Figure 1 Circuit diagram of Inverter 12V to 220V 100W by Transistor

Figure 2 PCB layout and components layouts of the 100 Watts Inverter, 12V to 220V by Transistors

Parts you will need

Q1-Q4______BC557___45V 100mA PNP Transistor
Q5,Q6______BD139___80V 1.5A NPN Transistor
Q7,Q8______2N3055___100V, 15A, 115W, >2,5MHz NPN transistor
D1,D2,D3,D4_____1N4148______75V 150mA Diodes
D5,D6_______1N4007 __1000V 1A Diodes
R1,R4,R6,R7_________10K___1/2W Resistors tolerance: 5%
R2,R3___________150K______1/2W Resistors tolerance: 5%
R5,R6___________ 47K______1/2W Resistors tolerance: 5%
R9,R12__________ 220 ohms 1/2W Resistors tolerance: 5%
R10,R13_________ 560 ohms 1/2W Resistors tolerance: 5%
R11, R14________ 100K ____1/2W Resistors tolerance: 5%
R15, R16________ 10 ohms__10W Resistors tolerance: 5%
R17, R18________ 150 ohms_1/2W Resistors tolerance: 5%
C1,C2___________0.047uF 50V_____Ceramic capacitors
C3,C4__________0.01uF 50V____Ceramic capacitors
C5______________1uF 50V_____ Ceramic capacitors
C6_____________0.1uF 250V____ Ceramic capacitors
C7_____________0.1uF 50V_____ Ceramic capacitors
C8____________220uF 25V_______ Electrolytic capacitors
T1___230V AC primary to 12V-0-12V,2-8A secondary transformer.

## 68 thoughts on “Inverter 12V to 220V 100W by Transistor”

1. inenso says:

This projets are so much helpfull

2. i want make a ups for only one electric fan please help me about this

3. regz says:

i try to build this inverter but did not work. the one transistor 2n3055 is hot. please any body help me to work this circuit.

4. Sebin PAul says:

Is there any probs when we built this circuit in a breadboard……please help me

5. Djopong Nicodemus says:

i have done everything but is not working. When i connect the power (battery 12v) is not giving any output at all.And am worry bcos that is my project and am working on it but still is not working so i want u to help me

6. ANAND DANDGAL says:

It’s information very helpful me in my project”INVERTER USING SOLAR ENERGY” .

7. Shafiullah Bajaur says:

I want to make a 50 watts DC 12V to AC 120V inverter
So please help me.

8. Ramkumar dutta says:

I want to know about the cost of 6v, 8v and 12v w inverter circuit. pls help.

9. CAN U SHOW A SIMPLE TRANSISTOR ONLY CIRCUIT
FOR A 500 WATT INVERTER—-12VDC—-220V AC?
APPRECIATE-VERY MUCH FOR A CLEAR DIAGRAM THANKU

10. Mohammed Hamza says:

What type of transformer and of which rating should be used????

11. mehdi says:

hi
I want to build a system that charging lithium batteries

12. howell says:

its funny it works perfectly i tried it up todate its still working

13. howell says:

its funny it works perfectly i tried it, up todate its still working

14. numan says:

i needs a 500w inverter circuit any one can help me

15. TAMANCHA EMMANUEL says:

i want to know the components i can use to build a 12v 7Ah 220v inverter 50w.please the ratings of resistors …not more than two transistor

16. wisdom says:

pls l want the size of compunents that could be used to build an inverter that could power 100 wailt bulb.

17. zain says:

which type of transformer you used is this a current transformer or simple center tapped transformer plz help me I want to build this circuit

18. lwanga says:

thank you sir, it is agood idea.ihave worked it out for two years but still working.even i have improved it to 500W and beyond. God bless you.

19. wisdom says:

i need help to build 5000 wait inverter circuilt.

20. hai sir i have mini inverter two lights and use TIP3055 and 2N3055 and more plese help me

21. Hi,Arun
Thanks for your feedback.
Yes you can use TIP3055 transistor it is power transistor. I would like to use it. because easy to mount but it expensive than 2N3055.

22. Brijesh says:

Plz give how many ampr is required at input side in 12v dc battery?
12v dc but amp_?
and also tell me about the transformer rating, voltage_ and amp_?

23. Hi,Brijesh
Thanks for your feedback.
I used Car battery 12V 40Ah. and transformer 2A-3A.
I can use for laptop and 20w lamps.

24. simpley and nice projects i hink i is used home applyencants

25. Hi,subbu
Thanks for your feedback.

26. Hello
Site is very useful
I love some of the questions LaSalle
I would love to Create symbol such as this therefore sent this letter to you this Model
Micro Inverter using TIP41 or 2N6121 Eleccircuit_com.mht
I do not want to stochastic problems during the building and district corect me because I am beginner in electronics and components diffrant from one country to another and often for name
But I’ve found a wire size of 20 within the components and district did not understand his place in the circle
Is if it is used Transforma strongly 500 watts and district will bear you are working or collapse /
Secondly
Ask a circle called xenon raise electricity for the car battery front bulbs for cars and light color makes the car think the white circle enlarge Volt
I hope for your reply and help me
Thank you

Sorry for the poor quality of language translation and Google is also not good

27. hi

i Ask about Circuit called xenon raise electricity for the car battery front bulbs for cars and light color makes the car think the white circle enlarge Volt
sudannow123@yahoo.com
thanks

28. moha says:

hi 4 all
momename thannks
Thanks so much for the founder of the site, which allowed us to posts and thanks also to his esteemed visitors
Ask the electronic circuit for xenon used in lighting the front of the car and gives a strong white light searched the forums English and found them talking about circles xenon flash any light intermittent and disco parties please help me with knives circles components electronic large-sized conventional and not system components printed and does not Electronics Small Size
Thank you
And you greetings
sudannow123@yahoo.com

29. moha says:

hi
momename

This line did not understand it the last line in the electronic components to build this circuit easy inverter

solid Wires no. 20 AWG length 1 feet, for what iam not understand is it for main connector or???please help me
thanks

sudannow123@yahoo.com

30. moha says:

mome.name

Hello
What is the reason that in the absence of even one letter omitted patient Xue

مرحبا
ما سبب الغياب ما في حتى رساله واحده بيها اصبر شويه ما الوعد بيناتنا الفه اغنيه سودانيه مهداه لحصرتك
mome.name

31. moha says:

mome.name

Hello
What is the reason that in the absence of even one letter omitted patient Xue

مرحبا
المهندس الغالي
ان كنت تتكلم العربيع يجب ان نتخاطب بالعربيه في رسائلنا القادمات واشكر رحابة وسعة صدرك وكرمك الفياض

ما سبب الغياب ما في حتى رساله واحده بيها اصبر شويه ما الوعد بيناتنا الفه اغنيه سودانيه مهداه لحصرتك
mome.name

32. MOHA says:

hi
4all

who is inverter can run fans and motors sny inverter or none

thanks

33. Hi,Moha
This circuit cannot be used for AC fans or AC motor because it is square wave inverter.

I am sorry now not have sine wave inverter.

Thanks for visit.

34. prits says:

hello its prits again.. i want to know about the cost of total circuit..

35. Sam says:

Can you please give me the list of all components……….and how many amps of transformer and battery you are using…..plz

36. tahir says:

sir!
i want to apply this idea in my final year project please send me more detail about Inverter 12V to 220V 100W by Transistor.
i want to submit proposal on this topic for my final year project

37. tahir says:
38. Hi, prits
Thanks for your feedback.
Please look at text above again.

39. Hi, Sam
Thanks for your feedback.
Now I add the parts list, please look at text above again.

40. Hi, tahir
Thanks for your feedback.
Please read again.

41. simon says:

Hey needed circuit diagram on how to make mppt solar controller regards

42. Hi, simon
Thanks for your feedback.
Now I not have the high power controller.
But sometimes you may idea from simple circuit look athttp://www.eleccircuit.com/category/battery-charger/solar-cell/

43. saurav says:

total spend on this above cited project

44. Manoranjan says:

thanks for give us this information.

45. sai says:

Is that Inverter 12V to 220V 100W by Transistor will work properly………….?

46. amol says:

12ct12/230v what is 12ct12

47. Hi amol,
Thanks for your feedback.
Please look at T1___230V AC primary to 12V-0-12V,2-8A secondary transformer.
CT = center trap

48. mehdi says:

Very good.

49. mouli says:

I want to apply this idea in my final year project please send me more detail like abstract and applications about Inverter 12V to 220V 100W by Transistor.

50. LAWRENCE says:

Can 2n3773 work

51. Saud says:

Can I use 12v 7A battery for this project?

52. I Tried this circuit.But its not working.The 10ohm resistors are burning when supply is given.
help plzz

53. arun says:

when i done this circuit on breadboard both the 10ohm resistors got burned. please help me…

54. Hi arun,
Thanks for feedbacks.
Please check circuit for error again.
and Check polarity of both diode at power transistors.

55. Saud says:

I don’t have transistor BC139 and resistor 10ohm 10 watt what other transistor and resistor can I use instead of that transistor and resistor ?

56. Saud says:

Is it BC139 Transistor or BD139?
Because in the figure it is BD139 but you wrote in part list Q5,Q6 BC139

57. Hi, Saud
Thanks for your feedback.
I’m sorry for error in list Q5,Q6 = BD139

58. Saud says:

What other value of resistor 10ohm 10 watt can I used because i didn’t find 10ohm 10 watt?

59. arun says:

sir im getting 12v at input side of transformer before conectng transformer… bt wen i connect transformer voltage become 6v and im getting nly 110v output from transformer. please help me. im using 12-0-12 to 230v ,3amp transformer.

60. ann says:

The mistake was mine.There were error in connections.But another problem now is i cant simulate it in protus with some load connected to it.
can someone help please

61. laxman singh says:

use full

62. bett felix says:

I just wanna design a 1000watts pure sine wave inverter can u assist me knw the suitable ratings of the transform I am to use in my design otherwise assist me

63. UMAR says:

SIR MUJE AP YA POCHNA HEY K

12v 7Ah /
12v 2AH
converte kar sa te hey