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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Using Beaglebone Black to prototype commercial product

I am designing a system and it's safe to say I am a little out of my depth. The requirements of the project are as follows; drive 7" WVGA touch screen and generate graphics 4-20mA input 3 x 4-20mA ...
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186 views

Arduino - hacking 240 x 160 TFT LCD

I have an 8-bit Monocrome TFT (240 x 160) that is driven by MCU-A. I have MCU-B (Arduino) that needs to read the TFT Display in real-time. So far, I was able to 'split' the Flex wire to both MCU-A and ...
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190 views

HD44780 DDRAM and CGROM Interaction

I am looking at interfacing to a HD44780 LCD display with an STM32VL discovery board. I am aware drivers exist but in the interest of learning I am doing it myself. I am curious about the interaction ...
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807 views

LCD 16x2: circuit to adjust the LCD backlight by a PWM signal

I am testing a lcd 16x2 whith msp430g2553. I am controlling the backlight by PWM signal. I am using the P2.4 as output generating a PWM signal. I have connected the anode directly to pin P2.4 of the ...
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52 views

Switching backlight to RGB in the following monitor C24FG70

I have the following monitor: Samsung C24FG70. Is it possible to change the white led backlights with RGB leds? Possibly the smd APA102 with the following microcontroller: ESP8266. How could i hook ...
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414 views

How to use 74LS245 to level up signals form 3.3V to 5V?

I am using FPGA 3.3 V outputs to drive 16x4 character LCD (5 V). I went through the data sheet 74LS245 and found this can be operated at Vcc 5 V and accept input voltages from 2 V. I am confused ...
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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://...
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288 views

Can I use a touch screen from an old Blackberry on a Raspberry PI?

I have a pile of old Blackberry phones with capacitive touch screens and I'm hoping they can be reused as, at the very least, output devices for Raspberry PIs or even microprocessors. Is this even a ...
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1k views

Electronic component that is like an LCD version of an LED?

Is there a liquid crystal display version of a light emitting diode? I want a visual indicator that is a small and simple 2 pin device like an LED, but instead of emitting light it just turns black or ...
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2k views

LVDS Displays - Swapped EVEN and ODD Channels?

A friend of mine gave me 2 LCD display driver boards (VGA/HDMI to LVDS). One has RTD2553V chip (from Realtek) and the other has RTD2660H (I cannot share the datasheets because they are not public). ...
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138 views

Raspberry PI, PCF8574AT, MPU6050, BMP180 i2c voltage difference?

I'm building a rpi 3 b+ based robot which collects data from a MPU6050 (Gy-521 breakout board, I power it with 5V), a BMP180 (3V input) and displays some data on a LCD via a PCF8574AT i2c converter (...
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324 views

Interpreting touch screen data (I2C, FT5306)

Edit: sussed it, largely to help below. It turns out, screen X/Y do not have to correlate to touch sensor X/Y and, even more strangely, the touch resolution does not necessarily match screen ...
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298 views

24 bit rgb display training/resources [closed]

How do I write code for a 24-bit RGB TFT LCD display (if possible, also for touch-screen use)? I'm using a PIC18F microcontroller to interface with the LCD driver/controller. The microcontroller isn't ...
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2answers
312 views

Beaglebone Black LCD/TFT/display and I2C2

I am considering buying a 4D Systems I2C LCD for the BBB, e.g. a 7" touchscreen, which uses the I2C2 bus. The question is, will I be able to use other peripherals on I2C2, on a home made cape, ...
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161 views

Anyone an expert on mobile LCD displays? [closed]

Reason I ask is, I've noticed with water damaged iPhone 6 screens if the pins on the connectors of the screen itself have corroded and you fix them with cleaning and fresh solder or jumper wires 8 out ...
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464 views

LCD interfacing Issues: Embedded Systems

Hobbyist tend to use parallel communication for interfacing with an LCD and all the libraries are for a specific type of microcontroller (Arduino or AVR) or LCD. But, for a design engineer, it is ...
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385 views

How to read LM34 temperature sensor negative voltage with atmega32?

I'm trying to read the temperature witr LM34 but it only reads from 0 to 50 F and ut's rage knows as from -50 to +300 F, so i asked a lot and i found that my circuit below can't read a negative ...
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93 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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1answer
63 views

Power supply issues with LCD and MPC23017 expander chips

I have an Arduino Uno and I'm working on a project that requires me to use six MCP23017 chips on a I2C bus plus a LCD 16x2 monitor. I need MCP23017 chips to power 36 LED's at the same time (8 LED's ...
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695 views

LCD TFT Voltages

I'm making a board for a WF101-1024600AL#Z01B-FC TFT LCD. I don't understand (simply the datasheet doesn't help) what I have to do with VGH, VGL and AVDD. Should I provide these voltages externaly ...
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253 views

Sometimes LCD display is initialized half white

Rarely right after the startup my LCD display shows half the screen completely white, the other half shows the software without problems. The main problem here is that to see this problem I have to ...
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896 views

Why multiple bias voltages are required to drive LCD?

I have read this document: AN658 - LCD Fundamentals and the LCD Driver Module of 8-Bit PIC® Microcontrollers I understand that the main concern is to maintain 0 Vdc bias on every pixel when driving ...
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1answer
232 views

Panel mounting an LCD screen in a hobby project

I am looking into the initial design of a project I am working on as a hobby. I would like to use a development kit with an integrated LCD such as the 32F469I-DISCOVERY. I would like to include this ...
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170 views

Test an LCD for missing segments without looking at the screen? [closed]

I have a product with an LCD screen that sometimes fails with missing segments. I will test the product for a long time to replicate the failure. I will test many at once. I don't want to sit watching ...
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79 views

Segmented LCD — Voltage Sag Solutions

I've got a remote control transmitter, with a segmented LCD display. The MCU has an integrated LCD driver that is driving the display. I've got the MCU interfacing and working with the LCD. The LCD ...
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3answers
454 views

Looking for LCD replacement (OLED)

I'm considering replacing this 16x2 LCD module found in an early '90s E-Mu synthesizer with a modern OLED equivalent. However, apart from the Solomon name I can't find any reference to any of the ...
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1answer
77 views

How are displays updated? [closed]

If you would excuse the infiltration by a curious computer scientist with very little knowledge of hardware, I would like to understand better how modern displays are updated. I don't care about HDMI ...
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1answer
180 views

powering ads1115 i2c module

I have a lot of trouble running a prototype made up of two I2C modules, one of which is disabled at the beginning. Here is the list of components: Arduino Uno LCD I2C module Moisture sensor module (...
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89 views

lcd showing characters instead of blank space?

I have seen this type of error in my codes, in some of this situation like reaching to near about 90%, -99 % of an eeprom memory of avr microcontroler in Mikrobasic PRO For AVR of Microelctronica LTD, ...
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1answer
47 views

LCD & Li Ion batteries at -40°C [closed]

Does anyone know of a product like a heating blanket or similar i can have customized to cover my electronic product to protect it against negative temperatures of -30 to -40 etc. My LCD and Li Ion ...
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1answer
34 views

value of resistor when converting HC outputs to non-compatible inputs

Here's what I'm trying to do. I have a 32K EEPROM (IC1 is an AT28C256) with data burned onto it. What I want to do is select the address I want using shift registers and then load the output value (...
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41 views

Would increasing regulator rating allow connected components to a system to not cause brownout?

Currently, I have several ICs connected in a circuit to a 6 VDC wall supply through a 7805T voltage regulator. The outputs of the circuit are LEDs and I also have a test point in my circuit in which I ...
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396 views

Reusing LCD TFT Panel

Recently I have taken an old MP4 apart so I could maybe reuse some of it's parts. One of them is the touchscreen panel, but the big problem is, I don't know the pin layout of it. Is there a way I ...
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1answer
588 views

Internal LCD interfaces, FPD-Link, LVDS, very confused

I feel like I'm stuck in a room with doors all around me and every door I open just confuses me more and answers no questions and even so, I was still hesitant to ask a question because someone is ...
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155 views

LCD controller works with adapter but not with batteries

I started making a "case-top" as I like to call it. Raspberry pi 3-based laptop. Took an electrician's case emptied it and started putting the components in. https://www.sparkfun.com/products/12711 ...
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2answers
138 views

LCD user-defined graphics how to send instructions?

I've got a LCM1602C 16x2 liquid crystal display which I'm experimenting on using switches (without a micrcontroller) to understand how it works (I know that it is much more easier with arduino and ...
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3answers
817 views

Driving Nokia TFT LCD with STM32

How do I increase the refresh rate of a Nokia LCD that I'm driving using the STM32F103 microcontroller? The LCD is 132*162 and takes a 9-bit instruction/DATA with RGB for each pixel in 565 format. ...
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3answers
2k views

Resizing/Cutting LCD

For my personel project, I would like to resize an LCD. I know that it is a possible to cut an LCD horizontally with a laser cutter. However I don't know how they do this. As far as I understand, ...
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1answer
512 views

touch screen foil behind 5mm thick glass

I wish to make a small project that will enable me to control my tablet\ipad behind my shower glass door. I want to be able to put the tablet behind the glass and control it from the other side of the ...
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1answer
102 views

What is the simplest circuit which can automatically power on a V59 LCD controller?

Given a V59 LCD controller, what is the simplest circuit that would automatically power on the LCD once voltage to the red LED becomes present? The goal is to automatically turn on the monitor once ...
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2answers
629 views

Powering a calculator's liquid crystal display (LCD)

Hello, so I'm trying to use a calculator's LCD for a project of mine and I want to put a current through it. However, the LCD is powered by the "sheet of plastic" shown in the picture, circled in red. ...
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2answers
555 views

Can't understand where backlight pins are in this LCD module

I have this LCD display: RC0802A-BIW-CSX It is supposed to have a backlight, but I can't understand where the backlight LED is since the connections are just 14 pin, and backlight is not mentioned. ...
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2answers
102 views

Old laptop screen on tablet [closed]

I have a laptop that is working but one of the hinges is broken, I have a android tablet, is it possible to detach laptop screen and attache it to the tablet and get the tablet screen on laptop screen?...
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2answers
189 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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421 views

Standard Interface Between LCD and GPU

Almost all smartphones on the market seem to use a distinct LCD as their display, though most use an ARM processor with a GPU from one of a relatively (compared to the screens) small number of ...
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1answer
607 views

Physical connection of LCD using PIC18F4550 and xlcd.h

I want to turn on an LCD with a PIC18F4550 and the periperial library xlcd.h. My code is the next: ...
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201 views

Different voltage levels for LCD and microcontroller

I want to interface my microcontroller (ATmega32) with a 2x16 LCD. I am powering my microcontroller with 3.3V, and I need to use 5V with the LCD. Will be there any problem with that (i.e data signals ...
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1answer
558 views

Is it OK to connect not used segments of an LCD display to the backplane pin?

I have a digital voltmeter using the ICL7106 chip and the FE0203 LCD display. It has not been used for many years. It is still working but some useless segments on the LCD display are always visible. ...
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842 views

Connect STM32 FSMC to LCM with 6800 interface

I want to use STM32 to drive a LCM with a KS0108 controller. Sadly, it has a 6800 interface. Fortunately, ST gives a document: TFT LCD interfacing with the high-density STM32F10xxx FSMC . In p. 12 it ...
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2answers
125 views

Can i replace One big transformer with two

My LCD screen is noisy and the source of that noise is that big transformer inside the red circle, i want to change it but i cant find it anywhere, so im thinking if i can replace it with two little ...