Intro: Pure Sine Wave Inverter
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
Here you can find an update with eagle files.
You'll need also fuse bits for attiny:
fuse high byte:0XFF;