code for converter

Hi there,I have built AC/DC converter and now is time to use software, I have purchased Arduino uno. I don’t know how to started my code,please help me. I have 3 LED and Tsig X,Y,Z, while the board moves they supposed to change voltage.
I will appreciate your help.
Thank you

If you have an AC/DC converter why do you need software?

You need to explain what you would like the Arduino to do AND how it will interface with your converter - for example is there a knob on your converter that you would like the Arduino to rotate using a servo?

...R