Source: https://mokxi.com/parts/st7735 Updated: 2026-11-10 Part # TFT display, 1.8 inch ST7735 A 1.8 inch color TFT, 128x160, on the ILI9341 command set. Pick the tab color your library was told. See every part - 8 pins - 1 setting - In 2 projects - In 1 lesson Drawn live by the editor's own code, at the size you see it. At a glance ## The TFT display, 1.8 inch ST7735 in brief What it is, and every setting the properties panel gives it. The ST7735 drives the 1.8 inch 128x160 color TFT on the red board with an SD slot. Its eight pins carry Sitronix’s names: VCC, GND, CS, RESET, A0, SDA, SCK and LED, where A0 is DC and SDA is SPI data in, not I2C. On an Uno, SDA goes to MOSI on 11 and SCK to 13, with CS, A0 and RESET on any pins; on an ESP32 DevKit, SDA to 23 and SCK to 18. The board has a regulator, so VCC takes 5 V. It speaks the ILI9341’s command set, and what differs is the glass: the chip has 132x162 of memory for 128x160 of glass. Mokxi’s tab property is the colored tab on the film. Black, the default, uses all of the memory; green starts the glass at column 2 and row 1, so a sketch whose initR() names the wrong tab draws two columns and a row where nobody can see them and leaves a black stripe along two edges. MADCTL rotation, inversion, sleep and the LED backlight pin behave as on the ILI9341. The red and blue swap between the tabs is not modeled, nor the SD card, reads or gamma. Family Displays Pins 8 tab black (or green) black (the default) or green, the color of the tab on the panel's protective film. It is how the makers mark where the 128x160 of glass sits in the chip's 132x162 of memory. A black tab uses all of it; a green tab's glass starts at column 2 and row 1. Set it to match the module you are copying, and set the sketch's initR to match it. Pins ## 8 pins Named as the editor names them, so a wire lands where you expect it. Pin Role What it does VCC Input or output Supply; the board has a regulator, so 5 V is fine. GND Input or output Ground. CS Input Chip select, active low. RESET Input Reset, active low. A0 Input What this board calls DC: low for a command, high for data. SDA Input The SPI data in. It is not I2C, whatever the name says. SCK Input The SPI clock. LED Input or output The backlight. Pull it low and the picture goes out. How to use it ## How to use the ST7735 1.8 inch TFT with an Arduino The silk screen uses the chip maker’s names, and both mislead: SDA is SPI data, so it goes to MOSI on pin 11, not to an I2C pin, and A0 is the DC line, here on pin 9. SCK goes to 13, CS to 10 and RESET to 8, with VCC and LED on 5 V. The board has a regulator, so 5 V on VCC is fine. Construct Adafruit_ST7735 with CS, A0 and RESET, then call initR() with the tab your module has: INITR_BLACKTAB for the black tab on the film, INITR_GREENTAB for green. The two put the 128x160 glass at different places in the chip’s 132x162 memory. In the two color screens project, set the ST7735’s tab property to green without changing the sketch and look at the edges: a stripe is missing along two of them. Part pin Board pin SDA Pin 11 SCK Pin 13 CS Pin 10 A0 Pin 9 RESET Pin 8 LED 5 V VCC 5 V GND GND Adafruit_ST7735 compiles on every board here but the ATtiny85; on an ESP32 DevKit the SPI pins are GPIO 23 for SDA and 18 for SCK. Click to open it in the editor This is the simulator itself, running here. Click anything to open it in the editor. Open this project in the editor Read the full tutorial A black tab ST7735, from the two screens sketch How it is modeled ## What is true about the TFT display, 1.8 inch ST7735, here In its help article’s own words: what the simulation gets right, and where it stops. ### Modeled The offset. The chip's memory is bigger than a green tab's glass, and the part stores only the glass, so a sketch initialized for the wrong tab draws two columns and a row where nobody can see them and leaves a stripe of black along two edges, which is the picture that sends everyone looking for the other initR. MADCTL rotation, the window, 16-bit and 18-bit pixels, sleep, display on and off, inversion and the backlight pin all behave as they do on the ILI9341. ### Not modeled The color order. The tabs also differ in whether the glass is RGB or BGR, and a library set for the wrong one swaps red and blue on the bench. Here a pixel is always the color that was written. 12-bit color is taken as 16-bit. Nothing is read back. There is no timing: the 120 ms the datasheet asks for after leaving sleep is not enforced. Gamma and frame rate change nothing. From ST7735 1.8 inch TFT, in full. Projects ## See the TFT display, 1.8 inch ST7735 in a project 2 built-in projects use it. Each opens in the editor, already wired. Lessons ## Where it turns up in a lesson One lesson places it in its own circuit. ### Learn articles 1 lesson - Arduino ST7735: 1.8 Inch Color TFT Wiring and Code Boards ## The boards it is shown on This board has a built-in project with the TFT display, 1.8 inch ST7735 in it. - Arduino Uno R3 Libraries ## Arduino libraries for the TFT display, 1.8 inch ST7735 Built in, so the sketch compiles with nothing to install. Each page has the calls, the wiring and an example to run. - Adafruit ST7735 and ST7789 Library - TFT_eSPI More parts ## The rest of the bench Every one of these is drawn and simulated the same way. Full-size breadboard A real 0.1 inch grid with the rails and the center channel, 63 columns wide. Jumper wires Drag from any pin or hole to any other. Corners snap, and you can drag them. Power A supply rail at the voltage you choose. Ground The other end of every circuit. LED Lights when current flows. Five colors, and the brightness is what your eye would see. Filament lamp A tungsten bulb in a holder: an inrush when it is switched on cold, tens of milliseconds to warm up, and dim on half its voltage. Resistor Any value you like, with the color bands drawn to match. ESP32-C3-DevKitM-1 A RISC-V board that runs your firmware at 160 MHz on the real memory map. Pushbutton A 12 mm tactile switch. Hold it while the simulation runs. Raspberry Pi Pico The RP2040 board on our own Cortex-M0+ core. Pick a program and press Run. Raspberry Pi Pico W Raspberry Pi Pico W (RP2040). The same board and the same pinout as a Pico, with the CYW43439 on it. The WiFi is simulated (no radio; real internet through the Cloud panel’s switch), and the on-board LED, which hangs off that chip rather than off GP25, is driven through the same path. Everything else is the Pico. Raspberry Pi 4 Model B Raspberry Pi 4 Model B: the 40-pin header, driven by main.py with RPi.GPIO or gpiozero. See every part ## Wire up the TFT display, 1.8 inch ST7735 Open the editor and push it into the breadboard. It is free, and it runs on your own machine. Start building free Open the editor