A few of my blog posts, for example the microwave dish direction detector, were left as mere concepts and so I never elaborated on them. Also, I'm not very keen on releasing source code for a hobby project - the code was usually written in a haste, would be very non-portable, and thus I would have to turn down many requests for support due to lack of time. So I just write a blog post in hopes of being able to share the fun part of my adventure.
I've been thinking of possibly making more educational posts in the future, and I do have some as drafts. However, I'm a bit more perfectionist about them, as I see teaching as quite a big responsibility.