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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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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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1answer
275 views

STM32F411RCT6 not talking to LCD panel - I2C and HAL library

I have an MCU chip STM32F411RCT6 and I am using stm32cube software to generate HAL library based code. I have to establish communication between the MCU and LCD panel which is NHD-C0220BIZ-FS(RGB)-...
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1answer
106 views

Why won't my 12v 2.5A LCD driver board run when powered from a 12v 6A supply?

I recently put together a portable RetroPie project with an LCD from an old laptop, it runs fine off an old ps2 power supply drawing around 1A. However, I decided to try running it off 8 LiPo cells (...
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2answers
644 views

Hooking up LCD without potentiometer

I'm hooking up an LCD to my Teensy 3.2. All the connections are correct, except I had the contrast pin going to ground. This results in the screen being filled with square blocks. If I tilt the ...
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1answer
117 views

Trouble wiring a GDM1601 LCD to Teensy

I have the following LCD: http://www.xmocular.com/Upload/CMpdf/GDM1601C-01010742776.pdf I am trying to hook this up to my Teensy. I assume that because it has 16 pins that it's a HD44780 display. Am ...
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1answer
564 views

How do I get this LCD to work on Proteus? [closed]

I'm trying to display the letter "A" on LM016L (datasheet). I keep switching the E input but I get nothing. This is my circuit:
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304 views

Do LCD monitors emit high audio frequency noise?

I held my ear up to an ultrasound probe today and heard a high pitch noise. I am trying to deduce it's source. Someone told me it could be the LCD monitor generating the tone and the energy hopping ...
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1answer
2k views

Vee negative voltage output LCD

I have a LCD i want to use for a project but still can't get it working on a breadboard. I have used LCD's before so I'm familiar with them, this one however has something i haven't seen before. ...
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1answer
496 views

I have an old screen from a portable dvd player - what type of input is this, and how to I convert it to DSI? [closed]

Here is my screen's datasheet: http://www.datasheet4u.com/mobile/640898/AT070TN07.html What type of cable does this run of of, and how do I convert this to either dsi or gpio so I can use it with my ...
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46 views

Best values for R and C for LCD driver

This is a circuit I incorporated in my major project to drive an LCD. For C1, I used a 2.2nF ceramic disc capacitor and the resistor is 100K which based on a basic RC calculator, works out to be about ...
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1answer
227 views

what is type of this RoHS LCD ( Any datasheet)?

I have one 18 pin LCD with this information: 1Qcu099-FLYG-GBW So i don't know what type of the LCD is this and have not find any datasheet form google, So It's picture is here: If have more ...
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3answers
341 views

CAN not transmitting temperature data

I have been working on a CAN bus project. It is a project from the book Advanced micro controller projects by Dogan. It is a temperature sensor CAN bus project. As you know, the project can't be ...
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1answer
118 views

Do Twisted Nematic LCD need refresh (polarity reversal)?

The Wikipedia entry for the history of the LCD during the 1970s and 80s, states that twisted nematic (TN) field effect LCDs were available in the 1970s. Later, in 1983, super-twisted nematic (STN) ...
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1answer
131 views

Powering unknown LCD and connecting to FFC connector? [closed]

I recently took apart a dead LCD projector and found some tiny LCD displays inside, I have a total of three of these modules. Their model number is "Sharp G RLCDP0083CEZZ 952B18IK" and I wanted to ...
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2answers
228 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
560 views

STM32F7 Discovery LTDC unit - changing system clock

I have strange experiences with display on my F7 Discovery board. When working with 216MHz system clock, the display (LTDC) works properly. However after changing to 120MHz (using CubeMX, so the app ...
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1answer
112 views

Led driver interference on lcd screen but only when with 1 power source

I have a few lcd open panel screens I've modified with higher powered led strips instead of ccfl. In doing this I needed to add led drivers for voltage and current regulation. When utilizing the same ...
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1answer
563 views

CCFL wire polarity; any considerations?

Are there any considerations for the polarity of wires on a CCFL tube? I am converting a monitor from 120vAC to 12vDC using a generic inverter (AVT4029; also have AVT4168 not pictured) and LCD driver ...
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2answers
92 views

Matte Film On LCD Displays

What is the technical name of the matte material/film that is put on LCD Displays? Also what would be the method of applying such film on a blank lcd screen (if possible)? EDIT: (Not my picture, but ...
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0answers
77 views

Please don't use odd horizontal lines to drive LCD for both odd and even fields simultaneously?

Here's a datasheet for a small TFT LCD panel. http://www.yc-dz.com/productimages/05334956.pdf On page 7 (9th page of the PDF) there's a tabulated spec for tV, "Horizontal lines per field" (Min: 256, ...
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1answer
581 views

It's inductor or diode in LCD PSU [repairing]

I have a little problem repairing my LCD power supply (22 inch old monitor). I already change the damaged capacitors (one is good but i change all 5 anyway, last image bottom right). The problem didn'...
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1answer
5k views

Mysterious LCD interface without wires [duplicate]

I was ripping off a Center 352 Infrared Thermometer. The basic functionality is to sense the temperature and display it on an LCD. The LCD turned out to have no interface to the controller. The PCB ...
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0answers
2k views

LCD driver board M.NT68676.2 issue: Screen compressed, fills only part of display

I am trying to build a portable Raspberry Pi/Retropie system with an LCD screen I got from my old laptop (the idea is to have a portable gaming console to be used in a car). To drive the screen, I am ...
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1answer
110 views

A problem with using dipsw and lcd in AVR [closed]

why when I turn on another switch the content doesn`t change? There is a problem using dipsw and lcd in atmega16 microcontroller. The problem is not to change lcd content when I turn on another ...
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0answers
78 views

16x2 Charater display for outdoor use

I currently have a project installed in an outdoor location. It currently uses a 16x2 blue OLED display for simple messages to the user. Over the past 4 years I have had to replace the display ...
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3answers
354 views

The best mode to drive an LCD Display to get noise immunity

Which one of these modes is the best for get noise immunity when driving a LCD Display 16x02? (or 16x04 etc.) -I2C module using PCF8574 I/O expansion. -8 bit Parallel -4 bit Parallel I had a PCB ...
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2answers
1k views

how to deal with the EMI issues in the 16X2 LCD display?

I'm designing a product with 16X2 LCD display and it shows the junk characters when i switch the 3-phase contactor ON/OFF through the relay.How to solve this issue through software or hardware ...
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0answers
98 views

Identify LCD display orientation

When buying an HD44780 compatible LCD display with a backlight, is there a way to identify the orientation of the text on the LCD based on a standard part number? I'm asking because I don't want to ...
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2answers
83 views

Choosing a controller/drive for a bare-glass SLCD

I'm interested in playing with bare-glass SLCDs for low-power applications, so I picked up a few of these recently. It's four digit, seven segment, 1/4 duty, 1/3 bias SLCD with 12 pins. I'm unsure ...
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1answer
172 views

LCD not powering up on a breadboard - is the wiring correct?

I'm trying to power on a LCD on a breadboard. For some reason, the LCD is not turning on (No backlight). Here's how I wired it and I'd like to know if I messed up on anything: Datasheet: http://www....
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1answer
497 views

How to read this schematic involving potentiometer?

I'm trying to hook up my LCD on a breadboard and a schematic diagram involving a potentiometer is a bit confusing. Full Data Sheet: http://www.lcd-module.de/fileadmin/eng/pdf/doma/dip203-4e.pdf I ...
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2answers
1k views

How to use a logic level shifter for 1602 LCD

please bear with me as I am very new to electronics. I am trying to connect a NodeMCU dev kit (ESP8266) with a 1602LCD. I am using an i2c converter to interface with the LCD. The LCD requires 5V. I ...
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0answers
35 views

Powering 5" display with LiPo batteries

I'm using a 4DSystem 5" display with Arduino MEGA 2560. Normally Arduino is powered through a wall power supply but, in some conditions, I need to power the Arduino + LCD with batteries (for not more ...
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3answers
126 views

Hacking characters in custom LCDs [closed]

Say I have a device/instrument that has custom LCD for display with mix of text and graphic/icon on the corners. I want to log the values and feed it to the computer or say automate a response when ...
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2answers
1k views

iPhone screen pin layout

I have an old iPhone of which I want to reuse the LCD display. The thing is, I don't want to use it as an actual display but rather make a fancy lamp out of it. The question I have is how I can figure ...
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1answer
205 views

dip switch to LCD Panel [closed]

Just wanted to know?, Is there any readymade products available to convert a dip switch to interactive push buttons with LCD display. Just saw a nice product in Aliexpress, but I really like to ...
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1answer
137 views

D/I marking on LCD pinout

On most of the schematics it is RS (Register select) but I can't figure out what D/I (pin 4) mean, I haven't found anything about that. What could it mean ? The datasheet indicate it's the register ...
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1answer
160 views

capacitive touch film or integerated capacitive touch panel display? using under glass [closed]

We need to put display under 2mm glass. Our device must have capacitive touch input. which method should we use? Capacitive Touch Films (place it under glass) or LCDs with integrated capacitive touch (...
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1answer
509 views

Damping resistors on HDMI Input

I’m working on a new PCB design using an Mstar LCD controller (MST9812Q1). I can’t link or post a datasheet as everything has “confidential, for internal use only” plastered all over it. The ...
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1answer
128 views

Why did my Gameboy shut off during takeoff? [closed]

When I was young I remember playing my Game Boy Advanced SP in the airport terminal. When we boarded we were asked to shut off all electronics. I was setting a high score in Pokémon Pinball: Ruby &...
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3answers
2k views

Using 16 x 4 Alphanumeric LCD with MikroC Pro for PIC compiler

I am trying to interface a 16x4 LCD to a PIC16F877 MCU. The project is just a digital clock showing date and time from a DS1307 RTC. The display works correctly when I use a 16x2 LCD. But if I try to ...
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2answers
267 views

Custom 16PIN LCD pinout required for Arduino

I have this custom 16 pin LCD. Could somebody please provide me with the pinout for this? I'm sure this is compatible with the arduino lcd library. Thank you.
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1answer
279 views

Technical question on 16x2 LCD

In a 16x2 LCD there are 16 columns and 2 rows of characters, each character is made up of a grid of 40 pixels. My question is, do each of these characters have their own driver that drive every pixel ...
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1answer
364 views

How to power CCFLs from backlight using original inverters (from a disasembled LCD screen)

I've search the net and dealers for specs of these inverters, no chance! I'd like to make somme discreet lightings with the CCFLs, as the screen was disasembled in a hurry, without noting the ...
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1answer
965 views

Best Battery pack solution for raspberry pi and lcd

I'm trying to create a portable raspberry pi with an lcd screen. My lcd screen requires 12v and 4A to work properly and i already tried to follow guides like the following: http://www.makeuseof.com/...
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1answer
591 views

microcontroller doesn't work with Nokia 5110 LCD (PCD8544)

I'm struggling with my first AVR microcontroller - AtTiny85 to make it work with the known Nokia 5110 display. I wrote my own code to handle the LCD, it didn't work. Then I tried a code found ...
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1answer
420 views

Significance of bias when driving an LCD

I've got hold of several bare-glass T218010 LCDs and would like to drive them with a bare MCU (or, rather, an MCU plus a couple latched-output SIPO shift registers such as 74HC595). However, the only ...
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1answer
2k views

Why do some LCD manufacturers use linear polarizer and some others don't? [closed]

I wanted to buy some pieces of linear polarizing films for experiments with polarized LED lights. I could not find any options in local shops nor in Europe Amazon, but some quick search told me that ...
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3answers
98 views

Unsual sizes of TFT, LCD or OLED panels?

On Stackoverflow there was a question about a round TFT display, but that answer was difficult and pricey. What is the possibility of finding rectangular LCD/TFT/OLED displays that are small in ...
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1answer
92 views

What are the causes and solutions to battery-powered LCD backlight buzz/hum?

Many battery powered devices with LCD displays (eg: clocks or thermostats) will illuminate with a turquoise backlight when a button is pressed. Some of them will emit a buzzing/humming sound while the ...