Still working on my bench power supply, and wanted to move from my 16×2 retro LCD to something a bit more funky, and found these which use the Samsung S6D02A1 chip.
At the time of writing, you can get these from a UK warehouse for £3.30 shipped for a single unit. That’s awesome. However, the comments were quite bad and many people had issues with them – no matter how it was wired an Arduino wouldn’t drive it.
After lots of trial and error and searching all over, I discovered the secret hack: put 1K resistors between all I/O pins, and Vcc is +5v. Basically, I/O is 3.3v – the SD card on the back has resistors by the looks of it, but not the TFT. It’s cheap.