I have made a bunch of progress. First I'll start with the calculator project. I received the PowerBoost and the battery in the mail, so that allows me to know how well stuff will fit. I started desoldering the connections on the LCD board, but that was soldered way too well, so I ordered a solder sucker and that should help with removing the main connector. I then took the insides of the TI-83 and placed them into the TI-86 case which was kind of a fun project in itself. It involved a little cutting, drilling, and soldering, but in the end it functions well. The only thing is that the labels on the buttons don't match up to the actual functionality of the buttons.

I then took the TI-83 Plus case and removed a lot of the excess plastic so I could fit everything inside. I realized there's no audio jack on the raspberry pi zero, but building a small circuit should be doable. I also need to figure out exactly how I want the power on/off to work with the raspberry pi since it will be in a calculator form. Ideally I would like the ON button for the calculator to take it out of a halt state and for it to put it in a halt state if pushed when the shift key is pressed so it functions like the calculator on/off button.

On a different project, I had previously assembled a DSO038 Oscilloscope kit and wasn't able to get it to function properly. Apparently I had missed a step and didn't remove a wire that wasn't supposed to be in there. Removing it restored the functionality, so now I have another completed project as well as another tool.