Questions tagged [lcd]

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

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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
28 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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1answer
33 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
28 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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0answers
48 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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0answers
27 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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17 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
35 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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16 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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0answers
22 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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0answers
34 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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30 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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25 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
44 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 ...
3
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1answer
839 views

LCD TFT screen 2.8" ILI9341 SPI connect

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
289 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
379 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
38 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
70 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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0answers
53 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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29 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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63 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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65 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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0answers
40 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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16 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
477 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
207 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
159 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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0answers
197 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
161 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
100 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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0answers
77 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
85 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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0answers
265 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
73 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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0answers
195 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
454 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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0answers
222 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
703 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
289 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
120 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
376 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
323 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?
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1answer
263 views

Python - 16X2 LCD display error loading driver without sudo

I'm using Pi Zero/ Pi ZeroW with StrechLite to display an output on a 16X2 LCD display. drivers was installed as instructed on PiGuy official site. while running a sample code after installing - an ...
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2answers
2k views

Potentiometer on 16x2 LCD, does it need to be connected to VCC?

I am following this Adafruit tutorial on 16x4 LCD, and I managed to make it work. https://learn.adafruit.com/drive-a-16x2-lcd-directly-with-a-raspberry-pi/wiring From this tutorial, the potentiometer ...
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1answer
52 views

Setting up Raspberry Pi 3 with 7" touchscreen

I recently purchased a 7" touchscreen LCD with a driver board and I'm trying to figure out how to get it hooked up to my Raspberry Pi 3. Here's the driver board and my Pi: My main questions are as ...
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1answer
484 views

Kuman 7 inch LCD screen not working

I'm new to all things pi and just got a Kuman 7" 800 480 LCD screen. I tested it on my laptop first (windows 8.1) and it looked great. Plugging it into the pi, not so great. The colours are all off, ...
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1answer
316 views

What's the proper method for connecting a parallel LCD display to an RPi 3?

I'm attempting to interface this display to a Raspberry Pi 3. The data sheet outlines a relatively simple parallel interface in which you can write to the display. For those familiar with the ...