Questions tagged [display]
Questions about LCDs, 7-segment LEDs, E-ink displays, etc.
516
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Upgrade Lenovo L412 display to higher resolution [closed]
I am trying to find a way to upgrade my old but still good Lenovo L412 with its 1366x768 display.
After researching a while I found some compatible 14 inch panels with 30 pins lvds interface on ...
0
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1
answer
39
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Power Supply for VFD Display
I recently ordered a GP1294AI VFD display from Aliexpress. Unfortunately it did not contain the necessary power supply to power the display, but the datasheet did include the necessary schematics for ...
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1
answer
30
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Interface Parallel display - ESP32 [closed]
I accidently purchased a 2.4 inch Parallel display for my ESP32.
After some reading I noticed that perhaps a SPI version would perhaps have been more simple.
Display I am talking about is a NHD-2.4-...
0
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1
answer
27
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LVDS Display connected to Deserializer clarification needed
I need to use an LVDS display in my project.The pin configuration of LVDS display is given below(I can't share P/N here due to NDA).
As per my knowledge the PIN No 18 and 19 are Horizontal sync and ...
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0
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42
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Scalable Voltage Display
I am trying to create my first PCB, and I am trying to measure and display scaled voltage and current output from a few different sensors on several seven segment displays.
For example, one of the ...
0
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1
answer
58
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Help Find Unknown Bad Zener: Digital Volt Amp Meter
This is Digital Volt Amp meter display module. Working voltage was max 30v and I burned the transistor BL P11 NPN (1A) with more input. Replaced with CXT5551 (600mA), operating current for module is ...
0
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1
answer
36
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Confused about Sharp Memory Display's analog power and ferrite beads
I have no background in electronics.
I'm trying to understand Sharp Memory Display. I read the device specification to the best of my limited abilities, but still confused about a few things.
Why ...
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0
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36
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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 ...
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2
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303
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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 ...
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0
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40
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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 ...
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2
answers
129
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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 ...
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0
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58
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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 ...
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1
answer
79
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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 ...
7
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2
answers
506
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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 ...
1
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0
answers
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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 ...
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1
answer
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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 ...
0
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1
answer
81
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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 ...
1
vote
1
answer
115
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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 ...
3
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3
answers
410
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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 ...
0
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0
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48
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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 ...
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1
answer
76
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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 ...
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1
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94
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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 ...
1
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1
answer
68
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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 ...
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1
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90
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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 ...
0
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2
answers
148
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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 ...
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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 ...
0
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0
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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 ...
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2
answers
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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 ...
0
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1
answer
88
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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 ...
0
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1
answer
54
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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 ...
0
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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 ...
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1
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523
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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 ...
0
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0
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174
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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) ...
4
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1
answer
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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 ...
3
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2
answers
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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 ...
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1
answer
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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 ...
0
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3
answers
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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 ...
3
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5
answers
217
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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. ...
1
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1
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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.
...
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1
answer
35
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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 ...
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1
answer
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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
...
0
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0
answers
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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 ...
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4
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410
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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 ...
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1
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79
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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/...
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1
answer
373
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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'...
1
vote
1
answer
804
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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 ...
0
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3
answers
298
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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 ...
2
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1
answer
135
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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 ...
0
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1
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102
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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/...
2
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1
answer
139
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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 ...