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Questions tagged [lcd]

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

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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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41 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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24 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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32 views

How to use old dvd player screen [duplicate]

I salvaged an old dvd player screen and id like to connect it to my raspberry pi 2b for future projects. can i just "plug and play"? if so which one of the two connectors do i connect? i'm a real ...
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8 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
44 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
72 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
58 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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73 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
69 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
56 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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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
59 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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137 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
55 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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173 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
291 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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180 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
486 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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104 views

Pi3 + Waveshare touchscreen not work on start

i have a waveshare 7inch revices with rev.2.1. On the start i cant use the touchscreen. The touchscreen works only with the following steps: after the start unplug and plug the usb. What can i do ?
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1answer
210 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
647 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
89 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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1answer
210 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
253 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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46 views

Integrate 64x128 oled display in a 16x2 LCD display system

I have found a tutorial on how to set up a ethereum Miner using raspberry pi (doing it as a project, not for money) and I want to have a display on it. The article uses a 16x2 character display. I ...
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1answer
189 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
903 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
46 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
350 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
238 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 ...
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1answer
323 views

Adafruit Char LCD not working

I use a normal 2x16 LCD display and it already shows the black boxes along the upper row. But Adafruit_CharLCD is not working. I installed it with pip and I can import it into my Python script and use ...
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1answer
1k views

Connect old laptop LCD to RPi [duplicate]

I have an old laptop and I was wondering if I could take the LCD from it and use it with my RPi 3, the end goal is to make an RPi laptop complete with a 3D printed case, so would this LCD connection ...
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2answers
510 views

Pi to Arduino Serial Communication: Repeating character on LCD [closed]

I'm trying to send multiple characters (two digit numbers) from a Raspberry Pi 3 (Python 2.7.9) to an Arduino Uno via USB. The Arduino then prints these numbers to a 16x2 LCD panel. So far, I can ...
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2answers
672 views

Kuman 7 inch LCD touchscreen compatible with Raspberry Pi Zero?

Does anyone know if this Kuman 7" TFT LCD Capacitive Touch Screen is compatible with the Raspberry Pi Zero? On the website it says Raspberry Pi 3 2 Model B, RPi 1 B+ A but why wouldn't it work with ...
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0answers
378 views

Using LCD 400x240 with HDMI- LVDS Adapter

I'd like to get RPi working with my display on the car. The display's specs are here: https://file.io/w86H2M Internally it is 6-bit parallel LCD --> 18-bit resolution. The display housing has ...
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2answers
550 views

rPi3 I2C-LCD, do i need a logic level converter?

I have an I2C adapter for my LCD display i used with my Arduino. Both are 5V logic, and i know that the pi GPIO are 3.3 V. If i only need to "write" to the LCD, do i absolutely need a Logic level ...
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1answer
767 views

SPI vs 8-bit TFT

I read that 8-bit is faster than SPI, how much faster is 8-bit than SPI? Say, if I wanted to run a video loop of a wheel spinning, would the speed difference between SPI and 8-bit mode be obvious?
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124 views

Raspberry Pi Zero LCD + Headphone jack + Volume control

Is it possible to add an LCD screen, a headphone jack, and a Rotary Encoder (for volume control) to a Raspberry Pi Zero W? If so, how could I solder all this? Any useful links/tutorials are greatly ...
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370 views

LCD Screen on GPIO

I have recently purchased a small LCD screen to use with my Raspberry Pi, as shown below. I tried attaching it to 16 of the GPIO headers, connected to its 16 (usable) pins. I found this forum post, ...
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0answers
47 views

How can I replace smartphone with a Raspberry Pi? [duplicate]

Let's say I got the technicalities of the case figured out and I'm able to detach a smartphone like the Blu Studio XL. If I keep the beautiful LCD, battery, and tweak the case - how can I embed a ...
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2answers
2k views

Displaying IP On LCD Display

I am trying to get my raspberry Pi to display it's IP to my LCD display. I need to execute this command 'hostname -I' using python in a python script I have almost successfully made , grab the result ...
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0answers
32 views

use 7inch raspberry pi lcd board for tv lcd

i have a board like this http://banlinhkien.vn/images/201701/goods_img/5375_P_1483585464340.jpgI also have an 30 pins lvds lcd tv panel(its main board is broken).So my plan is use that raspberry pi ...
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1answer
139 views

How can any cellphone LCD be used as a portable monitor? [duplicate]

In simple, I just want to build some thing like : CC TV with small monitor and small camera (the smaller the both, the better). . For example, I need it to connect a camera so I can watch real time ...
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1answer
690 views

How to check if 16x2 LCD is 5 volts or 3.3 volts?

I got a 16x2 LCD display but I have no clue if it's 5 volt or 3.3 volt logic. I'd like to use it on a Raspberry Pi but I'm afraid to just plug it into the 3.3 volts if the display is 5 volt. The ...
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2answers
613 views

Raspberry pi model b waveshare spotpear 3.2 inch lcd touchscreen is not working

I'm working on a Raspberry Pi portable system and I'm using a waveshare spotpear 3.2 inch TFT LCD touch screen; I have followed the instructions on that page. I get the screen to work but not the ...