Questions tagged [display]

Questions about LCDs, 7-segment LEDs, E-ink displays, etc.

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Understanding rapid, non-permanent phone screen degradation

This question arises because of a problem observed during a phone repair but it is not a repair question! I haven't a hope of repairing the display but I would like to understand the display and ...
Transistor's user avatar
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1 vote
2 answers
261 views

Hacking a vacuum fluorescent display from an old DVD player

I have salvaged this front panel from an old DVD player. It has a VFD and an IR receiver. The board runs on a PT6315 chip. I know the basics of electronics and Arduinos, but I am not an expert. I ...
Rajeev Jeganathan's user avatar
0 votes
0 answers
33 views

Unable to communicate with SPI based display board

I need to communicate with a display board that is acting as master and my board will act as slave. The reference document says that " Totally 26 bytes for communication between display and ...
saki gujjar's user avatar
0 votes
1 answer
111 views

TFP401PZP: Unable to get proper video output, ghost screen/distorted pixels

I have designed my own display driver board using a TI TFP401PZP TMDS DVI receiver/deserializer which is connected to a 24-bit, parallel RGB, 7 inch capacitive touch display with a resolution of ...
Aryan's user avatar
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1 vote
0 answers
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SSD1306 Horizontal mode not working

I'm trying to fill the screen of SSD1306 white. I'm using horizontal page addressing mode to not set page address manually using commands. According to SSD1306 datasheet, when the column address ...
Pavlo's user avatar
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1 answer
75 views

LVDS for TFT touch display [closed]

I have a hardware with the LVDS interface to control the display. My question: Which programming language and IDE would be most suitable for programming LVDS? Or is it possible with any language like ...
unknown's user avatar
7 votes
2 answers
505 views

Is this iPad screen flex cable glued onto the contacts?

While trying to change the LCD driver PCB of an iPad screen, I noticed that the flex cables coming from the display are not soldered but glued onto the PCB. The flex cable on the right was cut from ...
Bob amall's user avatar
1 vote
0 answers
59 views

How can I maximize the refresh rate of this OLED display?

I have a single-color 1.5" 128x64 transparent OLED display with an integrated SSD1309 controller. It came with a small driver board that supports the SPI and I2C interfaces on the chip. I need to ...
Joshua Dotson's user avatar
0 votes
1 answer
50 views

Do I need to edge instead of set a pin that is considered a "strobe"?

I am trying to get the NHD-320240WG display to run using my 8 bit hobby computer. I have successfully gotten this display to work with an Arduino and have ported the code to 6502 assembly. When ...
Bart Friederichs's user avatar
0 votes
1 answer
72 views

Utilizing Multiple USB 3.0 Ports for USB-C DisplayPort Alt Mode

I'm currently exploring the possibility of leveraging multiple USB 3.0 ports to collectively emulate USB-C DisplayPort Alt Mode for connecting an external monitor. Is it technically feasible to ...
Lewis Trem's user avatar
1 vote
1 answer
96 views

Brightness / contrast controls: what do they do on LCD displays?

I was not able to find an answer via web search. AFAIK LCD displays can control brightness via changing brightness of backlight, in turn via electric current value (up/down). I don't recall reading ...
Martian2020's user avatar
3 votes
3 answers
410 views

How to display real time data on analog scale if maximum send rate is 50ms

I have nextion display on witch is positioned analog scale. It needs to present Amps from device which mcu monitoring. Problem is that current can grow by several tens of amperes in just several ...
subavet995's user avatar
0 votes
0 answers
47 views

Unable to drive 7 segment 6 digits multiplexed display using 74HC595 and arduino

I have reverse engineered some existing circuit that was given to me which consists of a multiplexed 6 digits 7 segments displays driven by 2 darligton arrays and BD227 transistors. The original ...
floxia's user avatar
  • 109
-2 votes
1 answer
76 views

Why can't I divide the total number of bytes of a .BMP file by the color depth? [closed]

I have a .BMP file resize.bmp. The total number of bytes that encode pixels in this file is 320 bytes. The color depth in this file is 3 bytes. 0x176 total number of bytes including Header 0x140 ...
stm's user avatar
  • 79
0 votes
1 answer
90 views

Achieving faster data transfer from a microcontroller to a display

The current fastest way of transferring data from a microcontroller to a display that I know of is by constructing the data in RAM and then sending it over to the display via parallel communication ...
ropeFullOfHope's user avatar
1 vote
1 answer
67 views

Diagnosing Issue in Bench Power Supply with Buggy Display

I have a BK Precision 1660 Power Supply with a buggy display. The system has two displays (master and slave), the slave display working perfectly fine while the master display will sometimes flash ...
mm3psych0sis's user avatar
0 votes
1 answer
90 views

Is an old smartphone display usable with MCU

Can a smartphone display be reused? Do these displays use some standard pinout or not? Display has this circuit on the back and a 24pin connector. I couldn't find anything about the ic. It's a ...
Hedgehog's user avatar
0 votes
2 answers
125 views

Current draw of small TFT display

Has anyone used these small 1" displays before with a GC9A01A driver? Link I would like to use it for a battery powered project but am unable to find info about how much current it draws. I'd ...
Thomas C.'s user avatar
  • 143
0 votes
0 answers
44 views

Is it possible to re-use a 7 inches TFT Display on Raspberry-Pi? [duplicate]

I'm trying to re-use a display I recovered from an old digital photo frame as a display for a Raspberry Pi. The display is a TFT 7" LCD with backlight, but it comes with a 26-pin flat cable for ...
Grohlfer's user avatar
0 votes
0 answers
51 views

Have I configured the correct current supply for my TFT LCD Backlight?

I am currently working on a custom PCB which integrates a 3.5" TFT LCD. I am planning on driving the TFT backlight using a MIC4801 LED Driver and want to make sure I have configured the correct ...
henryv3's user avatar
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1 vote
2 answers
83 views

Problem with changing scan direction when interfacing with a CH1115 display controller (very similar to popular SSD1306)

I'm trying to get a display with CH1115 controller to work using SPI. The current situation is that the display works with my code just fine: I'm able to control it to write and display data. The ...
FloatingGuide's user avatar
0 votes
1 answer
77 views

Monitor ID Pins on VGA Connector

I'm working on a hardware project where I want my board to act as a VGA monitor, so it has a female VGA connector on it. Everything I can find online says that pins 11, 12, 4, 15, are used to identify ...
tryna_learn's user avatar
0 votes
1 answer
51 views

Tablet LCD display to hdmi

I have an old tablet and an old phone and I have recovered the lcd displays from both of them. I want to use them as monitors with an hdmi or vga port, but seeing the cables of the two i do not know ...
Alessandro Valentino's user avatar
0 votes
0 answers
68 views

Can I connect this IPS display to a Raspberry Pi (or any SBC for that matter)

Can I use this display with a Raspberry Pi or any other SBC? It's a 640 x 480 IPS display with a 30 pin, 05mm pitch flex cable at the end of it. I've been trying to look for a connector or something ...
Ahan Jaiswal's user avatar
0 votes
1 answer
457 views

Can a CRT last 100,000 hours or even 300,000?

Online, I could find that high-quality cathode-ray-tube displays (whether be it for a computer monitor or a television set) have a design lifespan of 30,000-50,000 hours of cumulative operation. I ...
CoastCity Lapse 00crashtest's user avatar
0 votes
0 answers
147 views

Display Port 1.4 Hot Plug Detect (HPD) Behaviour on AMD 7040 Motherboard

For some reason I can't get my DP port working on the AMD 7040 motherboard that I have designed, where on the same board, I have also Mini-DP that has an identical electrical circuit (in schematic) ...
Firas Abd El Gani's user avatar
4 votes
1 answer
1k views

How do we control a 7-segment display with a rotary switch to ground and 12v supply?

I am currently trying to add a 7 segment display to my motorbikes gear indicator. requirements dictated by the bike: there is a positional switch to ground for each gear. If you think it's like a ...
Ashley Reid's user avatar
3 votes
2 answers
64 views

Can you damage a MIPI screen with incorrect timings / config?

Per the title really, I've been battling with (very VERY similar) MIPI screens from a few suppliers and they've been throwing different timings and configs / initialisation sequences at me... well, to ...
John U's user avatar
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1 vote
1 answer
77 views

What kind of displays and processors are used in consumer electronic products (like a coffee machine)? [closed]

I am presently working on the development of a smart kitchen appliance, which will eventually be sold in the market. As part of this project, I need to incorporate a touch display for the operation of ...
santosh kumar's user avatar
0 votes
3 answers
907 views

MIPI DSI touch screen compatibility with Orange Pi 5B

TD;DR Is DSI and MIPI D-PHY TX 4 lane the same thing? I came across a "Waveshare 7.9 touch display for Raspberry Pi" which has two options, HDMI and DSI. As I can see from Orange Pi's ...
44yu5h's user avatar
  • 508
3 votes
5 answers
214 views

Component that can display state without power

I'm looking for a component that can display a (binary) state without being powered. The only things I could come up with are flip-dots and e-ink. Flip-dots are hard to source and e-ink is expensive. ...
Zipdox's user avatar
  • 41
1 vote
1 answer
93 views

Can I run my 3.5" TFT backlight off of a 3.3V supply?

I just wanted to confirm my thoughts on the selection of resistor value for a 3.5" TFT screen I am working with. The datasheet gives a forward voltage of 3.2 V and a forward current of 120 mA. ...
henryv3's user avatar
  • 23
0 votes
1 answer
34 views

Ideas about generating images for E-Paper display

I am currently working on a project where I'm using a DA14531 BLE-module to collect data from some sensors and display the collected data on an E-paper display. As the display is quite large (400x300 ...
user294957's user avatar
-2 votes
1 answer
50 views

Need Timer circuit with Multiple Functions

Need a prototype following these requirements: 3 MICRO SWITCHES (Push to close) 1 LED BUZZER RESISTORS etc 2 digits 7 SEGMENT DISPLAY 1 DUAL TIMER IC (8 PINS) 25C08 EEPROM STATES: MAX TIME 10 SECS ...
technovative's user avatar
0 votes
0 answers
117 views

Do all smartphone displays use same protocol (Mipi) for display driving?

I thought of implementing a tool for capturing display signal over smarthphones with broken LCD. The idea is to open a smartphone and intercept the signal transimitted over the display using a ...
Dimitrios Desyllas's user avatar
0 votes
4 answers
392 views

Mechanical design of a 7 segment display

If I want to custom design a 7 segment display, I can design a pcb with LEDs etcetera, but where could I find guides on how to design the shroud (shrouding the LEDs from each other, so they don't ...
kando's user avatar
  • 379
0 votes
1 answer
75 views

PWM Generator Array

I want to use an AVR microcontroller to ultimately control an array of RGB 8-segment displays. The only relatively cost effective RGB 8-segment I could find was here, but it isn't common anode/...
kando's user avatar
  • 379
0 votes
1 answer
345 views

SSD1309: I2C and SPI pin voltage tolerance?

In SSD1309 datasheet (this is an OLED driver), I found some misleading information: VDD is 1.65V to 3.3V for IC logic VCC is 7V to 15V for panel driving I couldn'...
Daniel's user avatar
  • 949
1 vote
1 answer
728 views

EDID emulation in HDMI and DisplayPort, is DisplayPort really more difficult?

I've been doing a lot research on EDID and HDMI and DisplayPort and I have a question about the relative difficulty of always-on EDID Emulation between the two specs. With HDMI, almost every Matrix ...
Evan Carroll's user avatar
0 votes
3 answers
292 views

ILI9341 TFT display in XIAO ESP32 Seeeduino MISO issue

I am using a XIAO ESP32 Seeeduino with an ILI9341 TFT display that is working great. The touch screen is also working well. The problem is that I have to disconnect the MISO connection every time I ...
Bryan Medina's user avatar
2 votes
1 answer
130 views

E-Ink with Atmega and avr-libc

I am trying to understand how to drive an E-Ink display like the Adafruit 4196 with i.e. an Atmega328 with avr-libc. From what I could learn so far, I would write the image/text to a frame buffer and ...
Torsten Römer's user avatar
0 votes
0 answers
93 views

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 ...
Aaron Chew's user avatar
0 votes
1 answer
98 views

Why does this LCD screen need 23.6V power supply for the LCD?

I am looking for a graphical display that I can control using TTL-level signals (e.g. an Arduino MEGA2560). I have found this display from Mouser: https://nl.mouser.com/datasheet/2/291/...
Bart Friederichs's user avatar
0 votes
0 answers
72 views

Custom TFP401 based display color/frame issues

We have just designed a board using a TFP401A to decode an HDMI signal into a 24 bit parellel RGB signal that is then sent to a standard 50-pin TFT display module which uses a 24-bit parallel RGB bus. ...
dariomuller's user avatar
2 votes
1 answer
133 views

Simple low-power LED display

I am trying to build a LED project and I am looking for a little help to get started. I’m aiming to build a small, low-power LED display of 6 - 10 low-power white LEDs. It will have 2 small coin cell ...
Warranty_void's user avatar
0 votes
1 answer
133 views

DisplayPort Alt-Mode and USB4.0 port on USB Type-C Connector

I'm building an AMD FP7r2 based platform and I have a USB Type-C port to which I want to connect USB 4.0 signals. The USB4.0 signals can be also used for DisplayPort (the APU supports this switch), ...
Firas Abd El Gani's user avatar
1 vote
1 answer
228 views

Leading zeros on digital display: show or hide?

In everyday use of numbers, we normally show or write a leading zero only when it's the lone digit left of the decimal point. (Setting aside clocks.) However, I've noticed that on some digital ...
gwideman's user avatar
  • 2,729
0 votes
0 answers
52 views

Connect OLED display to dev board

I want to use a small OLED display for a project. I need a color display as small as possible and I found these models that would be good for my application: MDT0096AIH-SPI MDT0096AISC-SPI I will ...
Adrian's user avatar
  • 1
0 votes
1 answer
181 views

STM32F407 + LAN8720 status LED keeps blinking fast, error?

I made a custom board around STM32F407 MCU that is connected with a PHY Board with a LAN8720 IC via RMII. I also have connected an 2.42' OLED Display based on SSD1309. I notice when I turn on the OLED ...
Leandro Loureiro's user avatar
0 votes
1 answer
88 views

What’s the purpose of C1554 with this IC? I could not find a datasheet

This is a display IC for an iPhone 6. There was no display and all voltage outputs from the IC were 1.8 V (which is wrong). I finally traced it to shorted capacitor C1554. What is its role? Is it a ...
ohmmy's user avatar
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