Say you just wrote a project that uses an Arduino board, and you would like it to show up under hackster.io/arduino. All you need to do is specify which Arduino board you used in the list of "Things", and you project will be automatically submitted to the Arduino platform hub.
If you cannot find the right part from our search suggestions, you can create a new one, and select the appropriate platform under "Made by".
Lastly, please note that hubs have different moderation settings, and in some cases projects might require a review by an admin before they're published under a specific hub. They'll look at your project as soon as possible!