I know it’s the old round pin we used for phones back in the day but can someone send me a link to the exact one because I’m seeing too many round pin charges of different sizes. Also where do I go for tech help related questions like these? Is this the right community?
That’s great. I’ll try using that on the search bar.
Also be careful with polarity. Here is an article with some basics of power jacks.
https://learn.sparkfun.com/tutorials/connector-basics/power-connectors
You can order an adjustable power supply with a bunch of swappable tips on Amazon.