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Arduino Stack Exchange

Questions tagged [display]

A visual output device typically capable of displaying text and/or graphics. Can include various technologies, such as LCD, OLED, and TFT.

231 questions
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How to show the º character in a LCD?

I have a 16x2 LCD and I want to show a temperature: 23 ºC. But the º symbol is not properly shown. It shows a strange character instead of the º symbol .
Roby Sottini
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1 answer

7 segment LEDs on wood face

I'm not sure this is right place for this question, but does anyone have any idea how a 7 segment display is projected or embedded in wood for products like this? Full product info at…
devth
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How to use a common anode 7-segment, 4-digit display?

Please take this question as an example to (my own) answer below. I've got an 7 segment, 4 digit LED display, but I don't have any idea on how to wire it. I don't understand the difference between common anode/cathode, and I don't have 2 pins per…
Paul
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What design patterns can I use to handle user input and display updating?

I've used enough products with embedded microcontrollers and unresponsive UIs to know that it can make or break a product. Even a slight delay or lag between the button presses and the display updating, or button presses being ignored or double…
Cybergibbons
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RePaper 2.7" eInk Display with Arduino Due

I got a RePaper 2.7' eInk display that unfortunately doesn't support Arduino Mega because of its limited SRAM capacity (8k bytes). I am porting the library to Arduino Due because of its sufficient RAM capacity (96 KB in two banks: 64KB and 32KB). I…
Shirsha Ghosh
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4 answers

Save some arduino pins when driving a 4 digits 7 segments display

I built a simple clock using a 4 digits 7 segments LCD display. I display one digit at a time, switching on and off very quicky and cycling through digits. Everything is ok, but I used 8 + 4 = 12 arduino pins. I need 2 more pins for other features…
Ghigo
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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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2 answers

Confused between SPI and I2C for SSD1306 OLED

I recently got myself an SSD1306 OLED display: I haven't been able to successfully wire it to an Arduino (Mega 2560) however. I have been reading up on I2C and SPI and checked some libraries from Adafruit and U8G2. However, I'm confused, since most…
Bart Van Loon
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2 answers

OLED display crashes when connecting USB

I got an 16x2 OLED Display (DEP 16201-Y , compatible to the HD44780 controller) for my Arduino Uno and I got it to work in 4-bit Mode, but just if the USB isn't connected and it is powered by a 9V power supply. So my routine is: Connect USB and…
Niklas
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2 answers

Image Breakdown

I've been trying to figure out a way to store an image on the Arduino, and I couldn't figure it out. What I've been trying to do with this image is the following: Test that the arduino has the image by displaying on a touchscreen (I have the…
Assafi Cohen-Arazi
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2 answers

Nextion Display not getting updated data

I am using an Arduino Mega to display the readings of 4 pots on a Nextion Display as well as store them on an SD Card with a time stamp. I keep getting: recvRetCommandFinished err on the serial monitor and the display does not update with time. I…
Niteesh Shanbog
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1 answer

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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Yet another display 16x2 not working with arduino

I found hundreds of questions about display not working with arduino. However, no matter how trivial this looks like I am having the same problem I cannot understand by reading the other posts. I have an Arduino micro connected to a display from the…
Alex
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4 answers

Reading a 10 pin 7 segment (2 digits) sing Arduino 1. Please Help!

thanks for taking the time to read this, I really appreciate it. I am very new to Arduino and the Micro controller world so please forgive my ignorance. So I have an old 7 segment display that displays outside temperature, what i want to do is read…
user3537
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4 answers

3.5" TFT LCD Display is not working with Arduino Mega 2560 R3

Even I can't do similarly with my 2.4" TFT LCD in here still: 2.4" TFT LCD Shield isn't working on Arduino Mega Now, I have bought 3.5" TFT LCD display for my Arduino Mega 2560 R3 to try whether I could run the screen or not, and it is not working…
Bay
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