Questions tagged [lcd]

Liquid Crystal Display. For questions regarding connection and control of small LCD displays.

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Artillery [ ILI9341 ] 3.2" LCD Touch Screen White Display and Driver Problem

I bought this Artillery 3.2 Inch LCD Touch Screen Display Monitor: https://www.aliexpress.com/item/32553185633.html?spm=a2g0s.9042311.0.0.27424c4dFky0Ok But it only shows a white screen, so I ...
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33 views

How to use KeDei 3.5 inch (480x320) as a custom application display

I successfully installed KeDei 3.5 inch 480x320 TFT LCD on a Raspberry Pi Zero with Raspbian Buster. It works nicely as text console, especially when I use lens to magnify the view. :-) However, I ...
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1answer
52 views

Reporting undervoltage, accidental reverse voltage

I've got a raspberry pi 3b+ mounted in my wall with the official 7″ touchscreen, and after some time i noticed the symbol in the top right corner notifying that it does not get the voltage it's ...
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33 views

Why is 800x480 resolution so common?

The official Raspberry Pi LCD is 800x480, and there are many other popular displays that use that same resolution, at various sizes (ie Pimoroni Hyperpixel(Adafruit)). For example, I have a resistive ...
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1answer
34 views

intermittence in Adresses on a I2C bus when using more than 5

Hello im doing and experiment trying to Expand my raspberry to use 7 I2C devices (MCP23017 E/SP) its my first time using more than 1 MCP Im using SparkFun Solderable Breadboard to conect Pi 5v / GD ...
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1answer
50 views

Newcomer to RPi from web developing (HTML/CSS/Javascript). Do I have any advantages? [closed]

I'm looking to get in to the wonderful world of RPi. I can make a website with HTML/CSS/JavaScript/PHP so does that give me any kind of advantage over a true RPi newbie? For my first project I'd like ...
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1answer
31 views

How to login throught ssh to my raspberry with a lcd screen

So I just got a 3.5 inch lcd screen for my raspberry 3 b+. I connected it and installed the drivers and is working fine, but when it boots it prompts me with the ssh login (obviously, I just didnt ...
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49 views

How can we allow OS to control backlight via a GPIO as PWM

I want to make OS control backlight, that is, use a slider in some DE like lxde or kde. How can I make kernel aware that, to control backlight only thing it needs to do is, produce a PWM signal with ...
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1answer
33 views

NOVA USB touch panel is working with raspberry

I need to use one touch panel for my LCD monitor 32 inch, so i found this kind of NOVA USB touch panel : in the description it said it is working with Linux OS and working without needing to any ...
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136 views

Is There Support for 8-bit/4-bit parallel i/o bus (8080 or 6800) for LCD drivers?

I'm looking at using a 240x128 LCD with a UC1608 chip. Are there any packages that support parallel i/o with it? The UC1608 has support industry standard 3-wire, 4-wire serial bus (S9, S8, S8uc) and ...
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32 views

LCD NOKIA 5110 how to change only part of text/lines

I don't known if it's specially a raspberry oriented question, but it is related to my raspberry project then ... My question is in the title, how to refresh a certain part of the NOKIA 5110 screen ? ...
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20 views

stop code via systemd vs termination

i have an 16*2 char LCD connected to PI ,a C++ code is written to display "Date/Time" on LCD. when i execute the compiled code on terminal using sudo ./LCD it stats showing Time and when i terminate ...
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1answer
49 views

waveshare 7" LCD H : uses & reports wrong HDMI resolution

I recently got a Waveshare 7" LCD (H) with 3B+, running Raspbian updated to buster (uname -a says Linux rpi33 4.19.42-v7+ #1219 SMP Tue May 14 21:20:58 BST 2019 armv7l GNU/Linux) I set config.txt ...
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17 views

Which screen size in Pygame for an 3.5 inch LCD?

i try to fill out my whole LCD screen in Pygame with the best sharp resolution possible. So there is a difference between computer screen and the LCD. My LCD has resolution is 480×320. So choosing ...
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28 views

LCD Installation freeze because of low voltage?

i try to install my LCD 3.5 waveshare, but when extracting the folder and use sudo ./LCD35-show it starts shortly and then freeze. I Got the thunder icon and the freezed screen. Might this be the ...
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64 views

SPI Display – fbtft connects to wrong frame buffer

Today I installed an SPI display to my pi. I'm using fbtft and follow the wiki. I don't want screen mirroring, but force the SPI display to be a secondary monitor. I discovered, that fbtft connects ...
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36 views

Raspberry Zero USB connection Lost and don't detected again in Linux OS As USB Devices

I was installing my LCD 5 Inch TFT files in my raspberry Zero which connected to my PC (Linux LMDE), and after a while i have a mistake pressed accidentally some keyboard bottoms and then with this ...
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38 views

Raspberry Zero USB connection Lost and wasn't detected again in Linux OS As USB Devices

I was installing my LCD 5 Inch TFT files in my raspberry Zero which connected to my PC (Linux LMDE), and after a while i have a mistake pressed accidentally some keyboard bottoms and then with this ...
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2answers
61 views

HELP, undo code that was for another touch LCD screen. Now it won't boot all the way

How can I undo the sudo code that was run with the wrong type of LCD "...-show" The system boots to a certain point and then just does not continue. Ive tried mounting the micro sd and see if I can ...
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1answer
2k views

Rpi3B/Rpi4B ILI9341 / XPT2046 SPI 2.8" Touch TFT LCD Connection / Driver Problem

It is possible to connect this LCD TFT screen to the raspberry 3 model B please ? I don't understand the schematic for SPI connection. Any help is welcome thank you. I have follow this answer but it ...
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1answer
427 views

Is it possible to connect a Nintendo DS screen to a Raspberry Pi?

Is it possible to connect a Nintendo DS screen to a Raspberry Pi without the touch capability, or should I just buy another TFT?
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1answer
810 views

HDMI + GPIO Dual Screen

I am running Raspbian 4.19.34 with HDMI monitor (FullHD). I bought 5" LCD which connects to Raspberry using GPIO pins (by rpi rgb lcd and vga board). I am trying to get it to work like 2 screens. ...
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1answer
48 views

Earliest place in boot for output to I2C LCD (not HDMI)

We're using an embedded Raspberry Pi that uses a (I2C) 4x20 LCD (character) instead of HDMI. Since the boot process can take some time I'd like to get something on the LCD as soon as possible to say ...
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1answer
109 views

Connect touch screen 3.5" LCD and MCP3008 at the same time

Reposting this question asked by someone else a few years ago because it was unanswered and I am facing the same problem. I want to use a touchscreen LCD (3.5" TFT) and a MPC3008 ADC at the same time ...
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96 views

Raspberry pi3 TFT screen setup

EDIT: This is the the screen I bought This is my first post here so I hope I do not screw up too much... I have a raspberry pi3 with 3.5inch tft resistive touchscreen display (720x480) connected via ...
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31 views

Can I set up a Raspberry Pi 3 to use kedei lcd 3.5 with Android?

I have seen versions of Raspbian and Ubuntu which can be loaded on a Pi3 that support the KeDei LCD 3.5. I am hoping that I would be able to find a version of drivers and instructions if not an image ...
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107 views

Connecting Raspberry Pi to old found TFT display

I have an old car DVD player sitting around that has a fairly decent secondary TFT LCD screen (hannstar 721h440b19-a1) that I thought I could use with my Raspberry Pi 3 Model B. I opened up the unit,...
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81 views

LCD Display with I2C gives garbage when called by interrupt

I have problems with a 2x16 LCD Display controlled via I2C. I use python 2.7 and have a Raspberry Pi Zero W. When called from the main loop everything works fine and I can access the display with ...
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49 views

Converting C driver to NodeJS

I am looking for a bit of guidance. I am attempting to convert a Arduino LCD driver to nodejs. LCD:https://www.dfrobot.com/product-1737.html - spec PDF after bottom. I have researched I2C protocol, ...
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18 views

How can I make my touch lcd screen to work like a laptops touch pad

How can I make my touch lcd screen to work like a laptops touch pad? Is it possible because I am not able to access the corners of the lcd and I can't use the Pi correctly. Is it possible to make it ...
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1answer
1k views

Change back from LCD driver

I've successfully installed this 3.5" LCD display, which uses this LCD driver: https://github.com/goodtft/LCD-show. My problem is, that when I use VNC to remotely access the PI, (I assume) because of ...
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1answer
286 views

SPI access via C# .NET Core console app

I do not have much experience with C# or Linux/Raspbian so would like some advice/guidance please. Basically I need to write a C# .NET Core console app which will run on a Raspberry Pi Compute 3 ...
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1answer
211 views

How to connect 6 LCD 16x2 to a Raspberry Pi 3?

I need help with this project. I want to connect SIX LCD 16x2 screens to my Pi and send different messages between the screens. I was wondering if I could use I2C but there is a problem with the ...
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225 views

Touch screen functionality not working on raspberry pi zero w and 5 inch lcd screen

I have a raspberry pi zero w and a 5 inch lcd touch screen with hdmi. I have the raspberry pi connected to the screen by HDMI. I am running the latest raspian OS on it. It boots up and starts just ...
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1answer
181 views

Will either of these displays work on the Raspberry Pi DSI connector?

I came across two different DSI LCD touchscreens (1, 2), but I'm not clear if they will work on the Raspberry Pi, but more importantly, I'm not clear on what specs i should be looking at the check if ...
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1answer
144 views

Is splitting a wire off of a single 5V pin the same as using two 5V pins? [duplicate]

In other words, is two 5V pins plugged into two pins on another device (say a 16x2 LCD display) different or the same as using one 5V pin on the pi and splitting it to two pins on the LCD? For more ...
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92 views

Using LCD from tablet

I have a broken tablet with a good LCD screen. The LCD has a 40 pin socket, like this Original 10.1" LCD screen YDS101 WR02-16 YLMB-01490B-28W-A1 for the Mediatek k107. I can't understand, what is ...
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2answers
96 views

16x2 lcd display to raspberry pi black text instead of white [closed]

I just connected a lcd 16x2 display to the raspberry pi (directly, no breadboard). I can display text and send command to it without problem. The only problem is that the text is black while it should ...
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340 views

3,5" LCD display not work in raspberry pi

I have bought a 3,5" display from ebay, and I installed it onto my raspberry pi 3. I installed the LCDshow drivers, but when it restarts the display is white. I tried to start the gui, but it gives: ...
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1answer
85 views

Unable to show string on 2x16 LCD display

connected 2x16 LCD display to raspberry pi 3.I followed above tutorial https://www.rototron.info/lcd-display-tutorial-for-raspberry-pi/ I made connections as shown in the tutorial.Install adafruit ...
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1answer
39 views

Help in understanding how to use Raspberry Pi's “official” 7 in. LCD from Python script [closed]

Let's say I have a Python script that receives an IR signal and lights up an LED. We'll call it a "hit" indicator. In the IR transmission, let's say a person's name was embedded in the signal. How ...
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212 views

PI4J + Adafruit LCD with MCP23017

Got this device. Python example char_lcd_plate.py is working perfect. But I would like to manage it with Pi4J. I copied bits from python example LCD_PLATE_RS = 15 LCD_PLATE_RW ...
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1answer
518 views

qtdesign-UI using PyQt5 is not showing images on raspberry

My ui created in qtdesign is not showing the images on raspberry pi 3B+ with LCD-screen. I added them to the ui via the resource and in qtDesign5 they do show up. I have tried to add the image as ...
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243 views

Cheap 128x64 OLED

I purchased two cheap OLED modules, one is 0.96" 128x32 I2C at the following link: https://www.amazon.it/gp/product/B06XRBTBTB/ and the other is a 2.4" 128x64 at the following link: https://www....
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2answers
763 views

Upside down screen on Pi with Kumantech 3.5"

On a pi B with raspbian-stretch, I have tried every tip I could find to get the touch screen to rotate 180 degrees: commands in config.txt, new drivers, using ./LCD-show 180, and more. Nothing works ...
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1answer
327 views

Waveshare 4.3inch HDMI LCD shows blank white screen

I have a Raspberry Pi 3 model B running the latest version of Rasbian Stretch. Yesterday I've received my Waveshare 4,3 inch display. First thing I did was build it in my project, due to save height ...
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1answer
1k views

Pygame run on external screen using ssh

I have a raspberry pi with a lcd screen attached witch is mirroring the raspberry pi's display. I want to show a pygame window on it. When I run: python main1.py on the ripi terminal the pygame window ...
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1answer
161 views

TFT screen not working on Rpi A+

I have an old TFT LCD SPI screen, which I believe uses ILI9341 and would like to use it on my (old) RPi A+. Unfortunately, it just stays blank. I am not even sure it is working... My RPiA+ has a fresh ...
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2answers
437 views

LCD showing garbage sometimes using RPLCD

I am trying to use a 4x20 LCD display with RPLCD module. Its working. But if I run the program ten times every four or five times LCD shows these three garbage values(See below images). Here is my ...
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2answers
359 views

Can I use an Arduino LCD with my Raspberry Pi? [closed]

I have a 16x2 Arduino LCD and I want to make a bitcoin price tracker with it and my Raspberry Pi, can I do it?