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Questions tagged [tft]

A thin-film transistor (TFT) screen

A thin-film transistor (TFT) is a special kind of field-effect transistor made by depositing thin films of an active semiconductor layer as well as the dielectric layer and metallic contacts over a supporting (but non-conducting) substrate. A common substrate is glass, because the primary application of TFTs is in liquid-crystal displays. This differs from the conventional transistor, where the semiconductor material typically is the substrate, such as a silicon wafer.

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How to dim background LEDs on TFT display with ILI9341

I have bought a 2.5" TFT shield online, which is equipped with the ILI9341 controller. I need to dim the intensity of the background LEDs to match ambient light. This particular shield does not provide a pin to control the intensity of the LEDs with…
kxtronic
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ST7789 TFT display only shows a correct image while Arduino reset button is held down - Why?

I am trying to get the ST7789 TFT display to work with Arduino. I followed online guides for connections and am using the fast library fron github and included workbench ino (https://github.com/cbm80amiga/Arduino_ST7789_Fast). Problem: The program…
WildCat
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How to measure resistance of TFT Touchscreen

I'm using a TFT Touchscreen shield with my Arduino UNO, and I'm running "tftpaint" example by Adafruit. I've noticed that when initializing the Touchscreen object, a resistance value must be provided. Library default is 300, but a comment in the…
jotadepicas
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Which tft works on both Arduino Uno and Raspberry pi

Ideally I'd like a 2.8 inch and it to be touch screen. But most of all I'd rather it work on both boards without much hassle.
Sean Bradley
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Arduino UNO with NRF24l01 + touch screen

I have an Arduino UNO, a NRF24L01 as receiver (receive data from elsewhere), and this touch screen from Adafruit for display and control. The Adafruit TFT is a shield so it fits the UNO perfectly. I wonder if this TFT shield can share SPI pins with…
user27030
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Black screen when using higher SPI-speed for RA8857 LCD-controller

I'm using an Arduino Due that talks via SPI to an LCD (800x480) with the RA8875 controller chip. The most recent datasheet I could find is: RA8875 datasheet. Everything works as expected when using the Adafruit library. But, for my project, I want…
Sven Onderbeke
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Alternatives to Nextion display

I am wanting to have a display where I can design the GUI on a program and then somehow transfer it to the display. For the graphics I want to make, it would be really hard to manually write the code. I heard that the Nextion displays do this but…
DragonflyRobotics
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Multiple TFT's not displaying

I am trying to connect about 5 TFT's to my Arduino Uno and I got to the point of hooking two of them up without any issues. However, after a code upload, they stopped working. I then took all the code out and tested each in isolation and they still…
griegs
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TFT Screen with Arduino UNO does not display as expected

I have a 3.5" TFT LCD communicating in parallel connected to Arduino UNO. I expect it draws a white circle on a black background but all it does is to show a white screen. How to fix this? main.c // sudo apt-get install avr-libc gcc-avr binutils-avr…
ar2015
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How do I interface my ESP32 board with my 3.5" TFT Screen

I've bought an ESP32 board from here and a 3.5" TFT Screen from here. The ESP32 board has an UNO type layout so I thought it would work with the screen which is designed to plug in and play with Arduino UNOs. However upon plugging the board and…
hydroxy
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Is there a Arduino UI library that provides dialog box and button functionality at a minimum?

I have been looking at the Arduino TFT Library and it supports all the bits and pieces for making a simple display, but I am looking for something a little higher level that has primitive dialog box and button capability, and presumably, the ability…
Rich Maes
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TFT Screen & ATMEGA168

I have a Arduinio nano and a ATMEGA168. I'm using the ST7789 library. The sample code which comes with the library runs perfectly and runs the display when using the Nano, but the same code does nothing on the ATMEGA168. I'm using the official pin…
Rick Dearman
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Trouble obtaining values from Nextion screen to Arduino

Currently I have a setup running an Arduino BME 280 sensor and a 4.3" Nextion screen. What my program does is sent all the calculated values from the BME to numbers and progress bars in my Nextion on a screen called "Run". This page consists of 3…
Louis Janse van Rensburg
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Maximizing SPI-speed between Arduino DUE and RA8875 display driver

For a project I would like to be able to control my RA8875 display driver as quick as possible using an Arduino due. I started from the Adafruit library and replaces all "digitalWrites" with direct port manipulation. Apart from that I wanted to…
Sven Onderbeke
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I want a bar type display for my Arduino Project

I am trying to make a smart table project. But I have stumbled upon one problem, that is I don't know which display should I use. I need a display that has roughly aspect ratio of 2:1 but also has a relatively high pixel density. I have purchased a…
shafiyyah
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