This tutorial is for the 1.8″ ST7735 TFT display. This display is a true TFT, the ST7735R driver can display full 18-bit colour.
As the display is driven with 3.3V you will need voltage divider or logic level shifter to control it with Arduino.
Using voltage divider
Using Logic Level Shifter
- VA connects to Arduino 3.3V power supply
- VB connects to Arduino 5V power supply
- GND connected to the two power supply grounds
- When Bx has TTL 5V input, Ax will get TTL 3.3V output
- Connect OE to 5V