This project is trying to design a new modern PCB for the old TI92 calculator so a simple swap can be done . Doing this, you will get a fast RPI ZERO or a COMPUTE MODULE 3 PC + a high resolution 4 inch color display. The enclosure of this calculator gives a nice strong keyboard and plenty of internal space to add options: USB SD, Long range radio modules, sound etc ...The TI-92 calculators can be found easily on ebay.com at around 20-30 USD. The way they are built allows and very easy opening and components swaping. This project is made with Kicad, a bit of Solidworks. We need you help to speed up the process...
All source files are in our github directory (see link below).
After a pause, I'm back on the project. I was waiting for a good color display. WaveShare has released a cool 800x480 IPS color touch display (4 inch). This one seems to fit well into the re-visited pc board.
Tonight we are going to test the freshly received display with our selected Raspberry PI ZERO 2W . If ok, we will adapt the board and send to production