Hello,
Any ideas on how to make a DC to AC converter using an Arduino Uno?
What sort of frequency, voltage and current are you looking to output ?
Hi,
Have you Googled;
arduino power inverter
Tom... 
Isnt ac always 50 hertz? Also im looking for low current and voltage something like 5v
No i will now
Well i searched it and it kinda looks like a little bit too complex 
No. It can be any frequency. For example audio signals can be 20Hz to 20KHz.
If you mean mains power frequency, that is either 50Hz or 60Hz, depending on the country.
Hi,
What exactly are you looking for?
50 or 60Hz output?
Square or Sinewave output?
What voltage output?
How much current / power output?
What input voltage / source?
What is your application, what will it be used for?
Can you please tell us your electronics, programming, arduino, hardware experience?
Thanks.. Tom..
No
AC is Alternating Current
It could alternate at any frequency. Even the mains AC frequency is not the same all over the World
Oh well i look for 50 hertz i guess
So i want to use a voltage multiplier made of diodes and capacitors so i want a 5v input 50 hertz and really low current 40 mA also square
In my country i think its 50
Please try to answer each question you have been asked. If you don't know an answer, please say that, so that we know you did not miss or ignore any question.
Guessing is often not a good way to design stuff.
Okay so i want 5v 40mA 50 hertz square waves thats it
I look for 50 hertz
Ok, square waves is much easier than sine waves for an Arduino. You can use
tone(pin, 50);
However, 40mA is on the limit for an Arduino Nano pin. I would recommend using a current buffer to avoid shortening the Nano pin's life.
What will the signal be driving?
I am pretty sure i said arduino uno not nano
You did, sorry about that. But Uno and Nano use the same chip, so my comments about the maximum current are the same.