- The TFT is supplied with 3.3V (According to the datasheet the lines of the TFT-controller are compatible with 5V and the TFT is not destroyed till now, as I see the correct image as described above.)
ST7735:
7.2 DC characteristic. VDDI max voltage = 3.3V
ST7735R:
7.2 DC characteristic. VDDI max voltage = 3.7V
ST7735S:
7.2 DC characteristic. VDDI max voltage = 3.7V
I doubt if you will believe these values from three different Sitronix datasheets.
Looking at your Ebay link. The SD card has series resistors R2-R4. The LED has series resistor R1.
I can't read the values from the photo. You can read them from the item on your desk.
The TFT logic pins have no series resistors.
It is possible that the TFT module has some overvoltage protection on the flexible ribbon that connects to the reverse side of the pcb.
The Red modules from Ebay do NOT like overvoltage.
David.