![]() The first library is a driver for the ST7735 TFT display which can be installed from Arduino IDE library manager (Sketch -> Include Library -> Manage Libraries …, in the search box write “st7735” and install the one from Adafruit). ![]() ![]() The button which is connected to Arduino digital pin 2 is used as ‘next image’, when pressed the display will show the next image.Īrduino with ST7735 TFT and SD card code:Īs an addition to Arduino SPI library and SD library which are both built-in libraries (comes with Arduino IDE), the following code requires two libraries from Adafruit Industries: The SD card and the ST7735 TFT share the same SPI bus. The digital pins 10, 11, 12 and 13 are hardware SPI module pins of ATmega328P microcontroller (Arduino UNO microcontroller). The last pin of the micro SD card module (CS) is connected to Arduino digital pin 10. The fifth pin of the micro SD card module (SCK) is connected to Arduino digital pin 13, The fourth pin of the micro SD card module (MOSI) is connected to Arduino digital pin 11, The third pin of the micro SD card module (MISO) is connected to Arduino digital pin 12, The second pin of the micro SD card module (VCC) is connected to Arduino 5V, The first pin of the micro SD card module (GND) is connected to Arduino GND, The microSD card module is connected to the Arduino as follows (from left to right): Also this module contains an IC which is 74LVC125A and it’s used as level translator (from 5V to 3.3V). This module contains AMS1117-3V3 voltage regulator which is used to supply the micro SD card with 3.3V. In this project I used microSD card module, this module is supplied from circuit 5V source that comes from the Arduino UNO board. RST pin is connected to Arduino digital pin 5,ĬS pin is connected to Arduino digital pin 6,ĭC pin is connected to Arduino digital pin 7,ĭIN pin is connected to Arduino digital pin 11,ĬLK pin is connected to Arduino digital pin 13. So, the ST7735TFT display is connected to the Arduino board as follows (each one through 1k ohm resistor): 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. microSD card with FAT16 or FAT32 file systemĪrduino with SD card and ST7735 TFT displayĪrduino with ST7735 TFT and SD card circuit:. ![]() To see how to interface Arduino with ST7735 TFT display, visit the following post: The ST7735 TFT is a color display that uses SPI protocol, it has a resolution of 128×160 pixel. This post shows how to draw bitmap images on the ST7735 TFT using Arduino UNO board where the Arduino loads the BMP images from SD card and print them on the display. Drawing bitmap images (.BMP format) on ST7735 TFT display is quite easy because they are uncompressed images unlike JPEG images (.JPG format). ![]()
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