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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26 views

LCD Dimmer with Variable Resistance Circuit

essentially I'm trying to make a very basic circuit where a 3.7 volt battery is wired to a liquid crystal display, (or LCD), and the brightness of said display is controlled by a pentiometer to ...
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61 views

Why is shorting power connection required to start microcontroller?

I made a large-scale multi-circuit setup. Some parts are connected via ribbon cable and the LCD unit is connected via a 3 foot RS232 cable. The data rate through all cables is low since the main ...
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59 views

What receiver is appropriate for studying compromising emanations in 2019?

I'm currently reading the Cambridge Technical Report Number 577, Compromising emanations: eavesdropping risks of computer displays, by Markus G. Kuhn and published in Dec 2003. In the paper, Kuhn uses ...
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LCD for SLA 3D Printer Resin Curing

I'm doing some research on what types of LCD displays can be used to filter and pass UV light for resin curing - specifically in the context of building a DIY 3D SLA printer. The community commonly ...
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82 views

What happens when an LCD screen turns black/shuts off? [on hold]

I read about how an LCD screen works here, and it made me wonder what actually happens when the screen shuts off. Based off of this, I can think of several possibilities: Electricity is supplied to ...
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71 views

ILI9486 Display Init FSMC

I have ILI9486 based tft display to initiate via 16bit FSMC. I did gpio, fsmc, and lcd initialization. ...
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153 views

Display input from multimeter on PC [closed]

I have opened a Multimeter (Model:DT830D) and I want to take the input that is fed to the LCD display and display it on my PC instead using the serial monitor of the arduino. But I am confused about ...
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108 views

Max amps/volts for a 7 Segment LCD

I recently bought this LCD screen for a project: https://www.jaycar.com.au/4-digit-field-effect-lcd/p/ZD1886 This LCD screen is just for testing at the moment, the final project will use these (I ...
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23 views

Configuring the clock and LTCD stm32f7

I'm interfacing an LCD using LTDC. That LCD has a touch sensor that works for 400KHz. The touch sensor is interfaced using I2C. My problem is how to configure the clock for both to work. Right now I'...
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LCD Display hem19264 arduino

How to connect chinese LCD Display hem 19264 to Arduino UNO ? There are UC1609C controller, i found datasheet, but i couldn't download it. Maybe somebody can share datasheet? I found pinout for LCD, ...
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54 views

LCD Gasket Causes Touchscreen Issues

Edit: Pretty much all conjectures in my question have been proved to be incorrect. I started fresh with a new approach. New question is here. Original question: I'm having an issue with a ...
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Proper Method of Powering Nokia 5110 LCD

I am considering getting some Nokia 5110 displays for use with my Arduino Nano board but I am in a pickle because I can't tell the correct way to wire it. Some people say to power it with 3.3V and ...
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LTDC Animation with no internal memory

I'm using that LCD TFT 320*240. Here is its datasheet https://www.avnet-integrated.eu/fileadmin/user_upload/Files/Displays/Colour_TFT/UMSH-8252MD-1T.pdf I'm using STM32F7 for driving it. My ...
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179 views

Build In Self Test LCD

I've recently been trying to get a custom LCD (ET101005DSAK0) connected to an Embedded System on Module however without any success. When debugging why the LCD is not working I wanted to make use of ...
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Which part of some LED TV screens acts as two gratings crossed at non-straight angle?

Some modern LED TVs display the following diffraction pattern (photos taken from this question): In my answer to another question about the origin of this pattern I explained that this should be due ...
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176 views

LVDS display troubleshooting

I am currently working on a prototype connecting a SOC-board (Samsung ARTIK530) to a LVDS LCD display (DT070BTFT-PTS1). The display shows a very (!) distorted picture. I have tried fixing it using ...
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Nema17/A4988 + LED display pump, 5v circuit not complete?

I'm trying to build a pump from Instructables, with no experience at all. I appear to be pretty close but the 5V line from the Arduino does not power the driver or LCD screen via my perfboard, it ...
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609 views

LCD Data Pins from different ports

I am using LPC1769 and it's port pins as below image. DB0 to DB15: Port pins of LPC1769 used as data pins for LCD Control Signals for LCD: C/D : Register Select Command or Data /WR : ...
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Applying a 1/3 bias to an LCD display spec'd at 1/2 still safe?

We're currently using an MSP430 with an integrated LCD controller that only has a 1/3 bias mode. The LCD display has a 2-mux configuration and the data sheet specifies "drive method: 1/2 duty, 1/2 ...
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44 views

Fastest LCD data throughput 8080 or SPI

I recently ordered a 128x128 graphic black/white display with a ST7541 chip-on-glass. It took me 2,5 days debugging and frustration to discover that they didn't wire SPI through the flatcable. A big ...
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Ghosting Issues with IPS and TFT Panels ( from Waveshare and Sony ZUltra)

I've bought a used Waveshare IPS LCD and it has a ghosting issue, were as if you turn it on after about 30 seconds it starts to have ghosting and also burning on the edges effects, I am 90% sure that ...
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2answers
51 views

Why backlight an LCD display with AMOLED? Can IPS terminology apply to AMOLED?

I've been reading about IPS LCD and LED/OLED display technology in general, and am a bit confused about the following product: HP Spectre x360 2-in-1 Laptop: 15.6" 4K, i7-8705G, 16GB DDR4, 512 SSD, ...
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246 views

Characteristics of TN LCD shutters/light valves

I want to drive an LCD shutter, which are often found in 3D glasses, with a very low duty cycle (short time transparent, mostly opaque) but also a high frequency. The TN shutters seem to be limited to ...
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1answer
35 views

Correct Initialization Routine for LCD Panel (HX8357D)

I have acquired a color 320x480 TFT LCD display based on a HX8357D driver. It is an Adafruit 3.5" Touchpanel display. I would like to use it for one of my projects based on Rust. Currently, there ...
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Reverse engineering LCD signals on HP power supply

I have recently acquired an HP 6632A power supply and was inspired by Roberto Barrios' project of replacing the screen with an OLED display to do the same. However, it is evident that the 6632A is ...
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74 views

Connecting 21" screen to LVDS connector on motherboard

I'm working in an "All-in-One pc" project. For that, I have an old Dell laptop (which only works with DC adapter) and a 21" LG monitor. My question is: How can I connect the LCD panel directly on the ...
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1answer
82 views

Do carbon resistors not follow tolerance as they age?

I'm trying to figure out the problem with my LCD and resistors. The micro I'm using is AT89S52 and the LCD is a standard display based on the HD44780 chipset. Part of the code in my micro allows for ...
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2answers
287 views

Why do we need sync pulses in digital (LCD driving) context?

I am studying how to drive LCD TFT display with the microcontroller (STM32F746). The manual mentions that I have to set up timings for HSYNC, VSYNC, VBP (Vertical Back Porch), VFP (Vertical Front ...
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23k views

Why are LCD panels polarized at 45 degrees?

I understand the principle of operation of LCD panels, but I am wondering why the specific output angle of polarization was chosen over, say, horizontal or vertical.
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198 views

HTN LCD - Ghosting Problem

I am driving a large, complex HTN LCD with 3 Holtek HT1625 LCD drivers. There are over 700 segments. The data sheet for HT1625 LCD driver is here: http://www.holtek.com.tw/documents/10179/116706/...
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1answer
158 views

Do you need initialization when sending raw RGB data to a ILI9341 based LCD?

The title pretty much says it all. Can I just send RGB data according to the protocol or I need some init before that to make it work?
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Unable to find data sheet for MAX8918ITM

I am quite new to electronics, so I apologise for the inevitable mass of stupidity in this question. I am trying to find the data sheet for the LCD driver MAX8918ITM, from a Nikon COOLPIX L110, and it ...
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131 views

Arduino Interfacing Breadboard with SD Card + Shift Register

I have a small circuit, and use a shift register (74HC595) to help add output ports to drive an LCD display. As far as I have found, the latch pin can be connected to any digital pin, and I have it ...
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62 views

Custom LCD display design considerations

I'm in the early stages of designing a device that will have a custom, backlit LCD display and an injection molded case. I've never worked with a custom LCD display, and have not yet spoken with any ...
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1answer
216 views

XV0 and V0 - what does it stand for?

I'm looking for suitable GLCD, so far I have found the RX12864H, however the datasheet describes a lot of voltages and I'm bit confused. While the VSS and VDD are clear to me, I have no clue what do ...
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93 views

How to design a GUI using GLCD?

I have a small project that I'm working on. It has a NOKIA 5110 LCD. I want to make a nice GUI to view measurements, and also control the hardware. I've designed tow screen layouts which you can see ...
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1answer
56 views

STM32F746 Nucleo with FMC LCD

I am configuring a new LCD screen with parallel 8080 protocol (screen controller is SSD1351). I am using ST CubeMX to generate code for FMC (attached picture of the configuration). My problem is that ...
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34 views

Reusing LCD and precision balance components

For some time now I have been setting up a quality control system, which has started with a basic weighing system, which connects to a database and sends the information, and will end, I hope, with a ...
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5k views

Standard text LCD menu system

Is there a pattern out there for a simple menu system in C for a text LCD. I find myself re-writing code a lot for handling simple text LCD menus. I find most systems have a main menu and some sub-...
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61 views

Why are there air(?) bubbles within my LCD? [closed]

Photos: https://photos.app.goo.gl/BvqLVYkMBB7RjaMU7 (Nexus 9 Android tablet) My daughter's tablet is enclosed in a full-body case, so it's fairly well protected. Still, somehow, at some point I ...
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1answer
76 views

Why do we need to continuously refresh a high resolution graphics LCD while we don't need the same for a character LCD?

It is very easy to interface an MCU with a character LCD (let say, 16x2, 20x2, 20x4, etc.) because we don't need to constantly refresh what is displayed. Once we send what we want to see, it is ...
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1answer
74 views

Pin out clarification, I need some help understanding the pin outs

What do the pins "/CS", "SCK", and "SDI" mean? From my bad understanding of this diagram, I only have to run 3.3V to "/CS", "SCK", and "SDI". Is this true or am I way off? Let me know in the ...
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2answers
114 views

LCD display is garbled in between operations on STM32

I'm using a 16x2 LCD for a project on STM32F030R8. I wrote a library for interfacing and everything was working fine until recently. It displays garbled junk values in between operations, especially ...
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1answer
440 views

Help identifying this LCD module

I am looking to identify the LCD module pictured below and find a datasheet for it, or otherwise determine the pinout and figure out how to properly drive it. Front The lines of text on the ribbon ...
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5answers
3k views

Why not use monochrome LCDs instead of E-ink?

Recently I've been reading about E-ink displays and the benefit over LCDs, as I understand it, is that there is no backlight in E-ink displays and thus, physical light is reflected, making reading ...
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2answers
542 views

Horizontal offset with generic SSD1306 OLED display

I bought a generic OLED 128x64 display on ebay and had some success in getting it running with the Adafruit SSD1306 library. I ported the initialization function to C and am driving the LCD using the ...
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35 views

Not getting reading back from HC-SR04 with PIC18F45k50 MCU

Hello I'm trying to measure the distance with HC-SRO4 ultrasound sensor PIC18F45k50 micro-controller however, I'm not reading any value on the LCD screen. Here is the following code that I have ...
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1answer
112 views

LCD 16x4 is shifting the columns of the third and fourth lines

I'm using the PIC 18F4550 to write to an LCD 16x4. I used MikroC Pro for PIC to write the code and the Proteus to simulate. I'm using the library Lcd and Lcd_Constants already present on the ...
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2answers
58 views

STM32 TFT not displaying solid color

I am trying to use this display with an STM32F0 using SPI. I begin by setting up the peripherals using the following ...
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1answer
1k views

My 2.2" TFT LCD doesn't work (ILI9225 driver)(STM32F1)

Today I was working on this TFT LCD and I don't know why it doesn't work. This LCD is a 2.2" TFT with ILI9225 LCD driver and is connected to my STM32F1. Here is the datasheet of LCD driver: http://...