I like to make a trial testing small step up transformer to see its working. What are minimum primary and secondary wingdings i can have to see it working and give some higher voltage output after giving some lower input upto 12v. what should be minimum differences of copper wire primary and secondary wingdings in gauges. I already tried before but i do not see it working. A good tutorial video could be also be helpful.
Uploading transformer image for this purpose

 

There is a lot to know about transformers than just number of windings.. I tried it to, was not successful..
https://forum.allaboutcircuits.com/...sults-not-as-expected-need-your-input.142729/

 

What frequency?
What is the core material?

A step-up transformer can work with a 1-turn primary and a 2-turn secondary, but many factors must be considered.