![]() To avoid that, I connected each control line of the display to the Arduino board through 1k ohm resistor. Arduino uno with ST7735 TFT display and microSD card adapterĪll Arduino UNO output pins are 5V, connecting a 5V pin directly to the ST7735 display board may damage its controller circuit. The regulator steps down the 5V that comes from the Arduino board into 3.3V. In the display module there is AMS1117-3V3 voltage regulator which supplies the display controller with 3.3V (because it works with 3.3V only). GND pin is connected to Arduino GND pin, VCC and BL pins are connected to Arduino 5V pin. ![]() The ST7735S display module is supplied with 5V. The ST7735S shown in project circuit diagram has 8 pins: (from right to left): RST (reset), CS (chip select), DC (or D/C: data/command), DIN (data in), CLK (clock), VCC, BL (back light) and Gnd (ground). The following image shows project circuit diagram.
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