Legacy Projects
During my more adventurous tinkering days. There were a lot of builds and very frustrated wife. Some of them more practical than others.
The Magic Mirror was all the rage about a decade ago. There are some that are actually mass produced as of a few years back which was shocking. But, this one was at the top for me. Fully custom made. Required me to custom cut a frame, cobble together an old LED monitor, a Raspberry Pi2, and purchase a custom cut tempred two-way mirror. It was so much fun. The building of the mirror was longer than the programming.
SUPER PI

The super pi was actually a random experiment. I had read about a university student that could get time to access a super computer to do computational work so they decided to build a parallel processing super cluster of Raspberry Pi's. 32 of them if I recall.
It got me thinking. Can a super pi cluster break passwords faster? My version was built on Kali Linux (headless) and MPI. Which allow me to cluster the Pi's and use Jack The Ripper and benchmark against a Python native version. It was fun. Did it help. Marginally on the python version (noting that MPI was Python native). Made no difference on Jack The Ripper (which I assumed). But it was a lot of fun building.
PiGRRL

These were a ton of fun to build. Mainly due to the fact that you really had to build all of it. The original PiGRRL (blue case) was actually a combination of things. It was a harvested SNES controller, 3D printed case, TFT screen, Raspberry Pi 1 or 2 (if I recall) and a lot of soldering to get all of the buttons to work.
The Pocket Pi GRRL (red) was a the smaller version of that same system. So you can see all of the fun working inside of it.

I also made the PiGRRL2 which I will need to find pictures of. That was arguably a lot easier as there were etched boards for the controller that made the buttons a breeze to install and configure.
As more of these projects come to light I'll make sure to post them.
Enjoy!