- At the beginning, I used an electronics forum (a local one, not in english) to post my projects. After a while, the forum owner deleted all the attachments (it was not his fault), so all the pictures and files has gone. The text is still there, but useless without attachments.
- Then, I start using
https://hackaday.io/. Hackaday is a nice place to publish electronics projects, and it also have a big community of makers, so your projects is seen by others.
- Recently, I started my own blog at
https://wordpress.com/ . Wordpress is good because it let you make a local backup of your project, so you can be independent from other sites/blogs/forums. Also, if later you decide you want your own website, you can install wordpress and upload the projects you have saved from wordpress.com. To be more precise, wordpress.com is a site where the owner already installed the Wordpress platform for you. Wordpress is for all kind of blogs, not only for electronics, so you will not have a dedicated community, like you have on Eevlog or Hackaday. Also, posting a project on Wordpress is a little more complicated then posting a message on Eevblog, but not too much, it does not require to know web programming.
None of these have the look and feel of a blog, and you will probably miss the interactive discussions specific to forums.
There is a section here, on EEvblog, dedicated to projects:
https://www.eevblog.com/forum/projects/