Pure Sine Wave Inverter




My research

Step 1: Pure Sine Wave Inverter Using Atmel Attiny 13 and IR2110 Mosfet Driver

This is my pure sine wave inverter. Works great with all kind of sensitive electronics like TV's, electrical drilling machines. The maximum output power is around 300W depending which transformer is used.

The main advantage of this schematic is the using of power mosfets. It has also an overload protection using a TLC272 operational amplifier.

In this project a 6V to 220 V 100W transformer is used. The 6V winding pads are pad11,8,10 (three wires because of the big current) and pad7,6,9.

The output is 220V @50Hz.

An UPS transformer can be used for this project with the two windings mounted in parallel but be careful because the two windings must be placed in such a way that it is mandatory to have the same winding sense. If you don't know what to do please do not try this.

Step 2: The Circuit

This is the schematic for printing (scale 1:1 mirror view).

Step 3: Electronic Components Displacement

Here you can find the electronic component displacement (seen from above).

Step 4: Finished Product Demonstration

The finished product in action.

Step 5: Files Togheder With Hex Code for Attiny 13

Here you can find all the files needed to start this project.

You can use ponyprog 2000 to write the hex to attiny.

I have also included schematic for a simple avr programmer for attiny.

A more powerfull version without transforme will follow.

For questions do not hesitate to contact me.

Step 6: Pure Sine Demo(low Voltage) at H-bridge Exit

Step 7: Pure Sine Demo(high Voltage After Transformer)

This is the wave form after transfomer. A 1/10 probe was used as shown in the video.

Step 8: Eagle Files for Inverter and Programmer

Hello guys,

Here you can find an update with eagle files.

You'll need also fuse bits for attiny:

lock byte:0XFF;

fuse byte:0X7A;

fuse high byte:0XFF;

calibration byte:0X51;

4 People Made This Project!


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65 Discussions


Question 13 days ago

sir can you send me this code in arduino sketch please........
please reply me back
your understanding is higly appreciated


9 months ago

I assembled above one -not working(attiny out put very less near ti 1 hz)


Hi, the code is not my design. I cannot help you with 60Hz version.

I can, however, send you the original eagle files. Please send me your email.


hi, thanks again please send file eagle of this project to the follow email:geraldino250@gmail.com, thanks, the link original of this project you have of thios is of some friend?, thanks again



I'm trying to send you the files but I get failure notice. Are you sure that this mail is correct?


Reply 2 years ago

Dear Sir,

I have sen your Pure sine wave inverter project with attiny13, I want to make the circuit for testing , can you provide original hex file or source code ?because attached hex file making 5Hz only but need 50Hz ,Pls send the code at alamgirtpi@gmail.com




yes man it is my e-mail geraldino250@gmail.com, that correct function no proble with this account, try again please thanks...


3 years ago

helo maryan_r85

1- What is the value and type of R20 resistor ?

2-What is the Pad1 and how can I use it؟

3- what is 22-23-2031 pads?

please help me

thanks a lot

1 reply

Reply 1 year ago

Helo Roobert,

R20 is a fuse, see in the video.This guy use a car fuse 10 Amp.

inversor R20.jpg

1 year ago

Can TLC272 be replaced with TLO72


4 years ago on Introduction

Hello Orngrimm I don't know why you are so sarcastic about this circuit, having a sine wave the way you want it will not be practical as the fets have to be driven in class AB or so and that brings a lot of loses. The way our friend build this inverter is that the sine wave is generated in square wave steps of different duty cycles thus the resultant outcome is a sine wave at 50Hz. An output filter will surly be needed as harmonics will be present in the output. Well if you want a pure sine wave I believe it has to be made by a rotating generator which will be the pure birth of a sinusoidal wave.