Questions tagged [lcd]
Short for Liquid Crystal Display. LCDs consume little power, and exist in graphic LCDs, or segmented. The latter type is used for character and 7-segment digit display, and also in custom LCDs for consumer electronics.
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Splitting video output from 30 pin eDP
I'm trying to display the same video output on three different LCDs, each taking a 30 pin eDP input. I could get three control boards, one for each display, and get a splitter that splits a single ...
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How can I test an LCD with an RGB port?
I want to test this LCD. When I connect its power, the message "no signal" appears on the screen. How can I send a simple signal to it for testing?
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How to convert VGA to RGB?
I have an LCD screen whose connector does not have a synchronous pin (according to the photo). I want to connect a laptop to it through the VGA port. Can you help me?
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How to get 70" LCD with LVDS connector to work? Is matching 2ch 8bit interface needed?
I have two working 1080p 70" Panels but the interface board is quite custom and somehow broken - the HDMI input just causes some flickering at most.
I already did a lot of research but I did not ...
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Control LCD backlight using PWM
I have an AFY480272A0-4.3INTH TFT LCD and I'm confused about how to control the backlight using PWM. After googling it, I found this similar problem.
Here are my backlight LED characteristics:
After ...
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Help identifying and getting datasheets for circuit board and LCD
Overall goal: I have a 400 kg mini crane hanging scale that displays the weight on a LCD. I want to add Bluetooth to it so that, in addition to the LCD, the data goes to a phone app or computer. This ...
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Finding the pinout of a bare LCD display
My kids have night lights that died. Of course I gutted them and found nice little displays. They show a 4-level battery control and a 2-level light control. I think they are pretty neat and I would ...
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LCD 3.3V Black Boxes Row with STM32F030C8T6TR
I'm learning mcu programming using ARM Microcontrollers: Programming and Circuit Building Volume 1 book by Patrick Hood-Daniel and I stuck on Chapter 17 "Add the LCD to the Circuit". I've ...
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Does anyone know this LCD display?
In the interest of recycling old components, I was searching my 'junk-box' for a small display for a project and found this one. The size would be ideal...
I don't know the origin, but I'm intrigued ...
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Unexplained dip in LCD screen brightness
I am using a 16x2 I2C LCD module in my Arduino project. The schematic is shown below:
My power supply is shown below:
It was working fine till recently, but since some changes done which should ...
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I2C interfacing between Raspberry Pi Pico and LCD-Display 1602A doesn't work [closed]
I want do display text on my LCD 1602A display using a Raspberry Pi Pico and PlatformIO with Arduino library. Since the address pads on the PCF8574 board are empty, my address should be 0x3F or 0x27. ...
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Turning off the DEM 128064B SYH-PY display
I'm trying for warming up to turn off and on the DEM 128064B LCD based on the instructions defined in the datasheet page 12 section 10-1, but I nothing changes and the LCD is on always with all the ...
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What is the name of the controller that turns a framebuffer to an LVDS signal?
I've been googling around for a bit and I'm having trouble coming up with the term for a device that takes in an address and a color and saves it to a frame buffer then sends that frame buffer over ...
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How to get EDID code for Adafruit TFP401 HDMI/DVI Decoder to support 640x480 display
I'm a Flight simmer building my own Airbus A320 home-cockpit (call it a 10-year project). I'm currently building the MCDU (Multi-Function Control and Display Unit). This needs an LCD of roughly 5.6&...
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Can an LCD be damaged by a low battery voltage?
I've got a digital alarm clock where the battery got really low, to the point where the display was hardly viewable. I assume that the voltage must have really dropped. I put some new batteries in it, ...
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Connecting LCD I2C and RFID tag to esp 32 devkit
I want to connect LCD I2C and RFID card reader to esp32 devkit. My problem is they both have SDA pin and on esp I only see one, so how can I work on that?
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Power switch touch button
I am building a touch industrial panel PC with an embedded motherboard, an LCD panel and a touch sensor.
I need a touch button to switch power on/off.
I have three questions:
How can I switch the ...
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LCD controller to laptop screen
I found a universal LCD controller in my broken 32" Telefunken TV.
I thought of trying to use it on my broken 15.6" laptop screen.
The interface is LVDS (1 ch, 6-bit), 30-pin connector.
The ...
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How much does an LCD projector attenuate an 8000 lumen LED light source?
I am attempting to replace a high-pressure lamp in a 3 LCD (red, green & blue) projector with a 100 W LED array. This resulted in a very disappointing (dim) projected image.
From this stack ...
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ST7789 LCD Driver Row Address Set Bug
I'm using a 320x240 LCD with a ST7789 driver in 8 bit parallel mode. I'm just getting things set up and am trying to draw a small square in the middle of the screen to make sure everything is working ...
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Fixing old LCD with black patches
I pulled this multimeter (probably built in the 1980s) out of storage last week. About half of the display is unreadable:
The black patch simply stays when power is off:
This is a common problem ...
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Are there any visual differences between a normally white and normally black LCD?
I'm trying to understand if there are any differences between a normally white and black LCD, from an appearance standpoint. Does a normally black and normally white just show their respective color ...
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Using a DMF5001NY-LY LCD with a Pi Pico W
I just got myself a Pico Pi to learn electronics and MicroPython. I was digging in my pile of "I bought this to do something one day with it, but never did" and found an old DMF5001NY-L 1 ...
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DMA2D STM32F429
Can any one help me to change the alpha value in my foreground? I have written a function to show my images by DMA2D. It is OK when I call my function and change the value, but when I use a ...
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How can I re-assemble this cheap scale's LCD display?
I had to disassemble a cheap kitchen scale for cleaning after it stopped working because of fluids. To my surprise I found the LCD does not seem to have a physical connection, but some sort of ...
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What are common causes for LCD failure?
I recently disassembled my kitchen scale in an attempt to repair it. The LCD appears to have faded on the right side (which indicates the measurement type; g/ml/lb/oz). Although I managed to ...
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Shift -VSYNC Timing (Signals Cycle) LCD
I have this new LCD from Kyocera. When I powered it up I saw the following:
It looks like a vertical shift and the timing is not the same as my existing timing signals. Is there a way to configure ...
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Unusual segment LCD technology
I've been doing some research on old-school segment LCD displays for a project I'm working on and came across this video:
https://youtu.be/jLew3Dd3IBA?t=40
At the 40-second mark the YouTuber starts ...
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Design requirements for 24-bit RGB parallel interface
I'm designing a PCB to use a 4.3" LCD TFT display. The LCD has a 24-bit RGB parallel interface. The design needs to be EMC compliant.
My question is, what are the design requirements I should pay ...
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What prevents consumer mini LED LCD TVs from having +2000 dimming zones?
In most mini LED TVs released today, the backlight can consist of thousands or tens of thousands of LEDs. Yet most of the LEDs are grouped into much less dimming zones, around a few hundred or around ...
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What type of LCD panel is this?
I need a new 2.8’’ color display with backlight 320*240 LCD Panel Module.
This is for a desk phone - a Wildix Workforce desk phone.
I have taken the phone apart and here is a picture of the wire ...
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LCD panel: black/white frames before and after the normal video data
Please have a look at the following power on/power off sequence diagram I have taken from a datasheet for a Full HD LCD panel by AU Optronics:
The diagram's notes say:
Note 1: Insert a black pattern....
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My 16x4 LCDs are printing out junk [closed]
I have checked every other post on this, and no solution currently works and need an opinion.
I have an LCD (P/N: FC1604A01-RNNYBW-66SE) that is being powered by 5 V and is controlled by a 3.3 V ...
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Interfacing TFT LCD Module with Arduino
I recently found a 3.5in QVGA TFT LCD module (Stellaris LaunchPad LCD Boosterpack EB-LM4F120-L35) which is meant to be a booster pack for the EK-LM4F120XL development board by TI. It is supposed to ...
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How can I get higher fps with ESP32-CAM and ST7789 TFT LCD?
I have an ESP32-CAM AI Thinker board with an OV2640 image sensor and an ST7789 240x240 TFT LCD (SPI, but without a CS pin). I am trying to get a relatively good frame rate (30+ fps) on the TFT. I am ...
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TFT-LCD VCOM powered by LDO
Is it possible to generate VCOM voltage for TFT-LCD display by LDO? I am considering using MAX16929 for generating AVDD (9.6V), VGL (-6V), VGH (18V) and VDD (3.3V) for touch controller, but remaining ...
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How to filter EMI noise from DC motor between LCD and microcontroller?
I have a simple circuit just with LCD and MCU that writes text to it, something similar to this:
This picture is extremely simplified, the PIC has no unconnected pins in reality. This is the display ...
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LCD identification & repair
Afternoon all,
I am trying to repair a Mcculloch robotic mower which has (what I presume to be) a broken LCD screen. As per the photos the screen is just showing garbled lines. I'm hoping that ...
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LCD 16x2 is showing only black boxes despite correct wiring
I copied this tutorial from the linkalarm clock arduino but my LCD is only showing black boxes despite the correct wiring and code. I copied literally everything on the video. I also tried it with ...
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Proteus LCD doesn't display characters
I've been trying to show some characters on a LM015L LCD but I wasn't able to do it.
I've written the following code in C:
...
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Can I delay a screen repair after it’s been opened?
I’ve begun replacing an IPad Air Gen 1 screen, have done it many times before however this time I realised I was out of Kapton tape (so that I can hold the home button connector in place) and so now I ...
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How can I tell an HD44780S from an HD44780U LCD chip without markings?
I have a basket of LCDs collected over the years. I'm trying to build some circuits now but want to restrict my power supply to 3.3 volts meaning an HD44780U chip for the LCD and avoid having to ...
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How to drive 1 x 168 LCD using 4 x 32 LCD driver?
I have to drive an LCD that has only single COM and 166 segments:
Somehow using 4 x 32 LCD driver:
So I am going to use five such LCD drivers (32+32+32+32+32+32) ...
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Can i use a 19V 4A adapter for my 12V 4A control board? [duplicate]
I recently bought a control board for my lcd panel that needs 12 V, 4 A however the power adapter I have is 19 V 4 A. Would it blow the control board/lcd panel if i was to use the power adapter?
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Adafruit LCD Going blank when using static gun
I'm having a problem with an Adafruit touch screen Module.
When I use a spark gun (set to 20kV) on a grounded metal plate (placed a meter away from the DUT) after a few tries, the screen goes blank.
...
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16x2 LCD copper foil around the pin holes was accidentally removed
I tried to remove the I2C attached to the LCD. Is it okay if that copper foil around the 16x2 LCD pin holes got removed? I didn't do it intentionally, it just happened when I solder pumped the ...
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LCD scrambled by interference from RF plasma
My lab uses a custom-built setup to generate reactive plasma; basically metal plates in a vacuum desiccator energized by a BD-10A. I've built an arduino-based control box for it to allow more precise ...
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Decoding VGA Signals on a microcontroller design concerns
I have a microblometer sensor that outputs a VGA signal with resolution 640 * 480 pixels. Lets say I want 30 FPS..
I would like to know what would be the easiest way to convert that video signal into ...
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Interfacing LCD via SPI
Problem:
I am trying to figure out how to interface an LCD via SPI.
What is known:
It is 80x32 dot matrix.
There are 23 pins on a flex cable.
The pinout. I'll put it below. The LCD is marked with red ...
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STM32 C library for ILI9341 TFT LCD with 16-bit data bus?
I'm using FSMC with ILI9341 LCD and I have some troubles with the LCD.
The LCD comes in lot of different sorts, but this one do I have.
I'm using this library but the problem is that I get only two ...
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