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

learn more… | top users | synonyms

-1
votes
0answers
69 views

Why are OLED lcd prices rising (skyrocketing)? [closed]

I recently had a discussion with a friend who works as a mobile/ cell phone repair technician. He was bickering about how Iphone LCDs used to be expensive and Samsung LCD used to be cheaper. From our ...
0
votes
0answers
19 views

Arduino peizo detection circuit

I am working on a detection project using multiple Grove Piezo Vibration Sensors (http://www.seeedstudio.com/wiki/Grove_-_Piezo_Vibration_Sensor). What I want to do is take 4 of these sensors,...
0
votes
0answers
35 views

Embedded Display Port (eDP) standard

Is the Embedded Display Port (eDP) an actual standard, with an actual standard connector that can be used in every device bearing eDP support? What kinds of signals is it capable of carrying besides ...
2
votes
2answers
78 views

Dimming 6x large LED 8 segment blue displays

I am making a clock, using 6 rather large 7 segment blue displays. I am wondering 2 things. 1) Do I need a bypass capacitor on the 12V supply for each UDN2981 chip? 2) How can I control the dimming ...
0
votes
0answers
38 views

STM32F405 with 1.8" TFT from Ardafruit

I am developing a project, and to make things a bit easier I am wanting to do a small TFT to output some debugging information and I'm having some issues with the schematics. Here is the screen https:...
3
votes
2answers
103 views

How to drive 315 coills in flip-disc display

Recently I've bought 9 surplus electromagnetic flip-disc displays on Ebay. Each display has 5x7 dot matrix. Every dot is controlled by separate pin. See below: As far as I understand to flip one ...
2
votes
1answer
38 views

How to drive a E1144CS021 (EPD display)?

I was searching for EPD displays and came across this Pervasive Displays EPD, but after searching in the manufacturer's website, I couldn't find any information on how to actually use it. There are ...
1
vote
1answer
99 views

Faulty display behavior using a Atmega328 due to (wrong?) logic voltage level

I have built a little circuit using a Atmega328P to drive a DD-32645C-2A display using a connector board. The display uses a SSD1303 driver. So here is my circuit: Pretty straight forward, I ...
1
vote
0answers
40 views

Will a monitor work if I make a VGA cable with common return and ground? [duplicate]

This has been bugging me for a while but will a monitor unit work if I make common ground for returns for RGB and the ground? A bit scared to test it on my monitor.
0
votes
4answers
117 views

Display large decimal number using seven segments display [closed]

I have a 8bit value on the output of ADC. I need to show this number on 3 seven segment displays. How to do it? I'm working in Multisim 11.0. You can see a scheme of ADC that I have: Two blue ...
1
vote
2answers
57 views

Extend flat cable between LCD panel and driver board

Given a setup similar to this: https://www.adafruit.com/products/2395 The panel itself is nicely thin, but the driver board takes up some space. So I need to put it somewhere separate from the display....
1
vote
1answer
40 views

Resources for learning how TFT works and how to drive it at the glass level?

I just scavenged an TFT display from a digital picture frame. Using the number on the back of the panel, I was able to locate and download the data sheet. I read through the document hoping to ...
0
votes
2answers
40 views

VHDL - displaying 4 digits on 7-segment display

I wrote a vhdl code, that would display 4 digits on cpld 7-segment displays. I used a state machine to select the display, and with ... select instruction to select a set of bits given to the current ...
1
vote
1answer
72 views

Vacuum Fluorescent Display (VFD) serial connection ~ Debugging Questions

I am attempting to display information on a Futaba Vacuum Fluorescent Display (VFD) (apologies for the google-drive link to the datasheet. I lost the original and couldn't find it again). I'm ...
0
votes
4answers
85 views

Working display connected by GPIO pins to microcontroller?

Would it be possible to add a normal HDMI port or a display to any microcontroller with the GPIO pins? (I didn't buy anything yet, I'm just getting information before I buy...) EDIT: Thanks for all ...
-1
votes
1answer
34 views

What display and controller to use [closed]

So I intend to produce a prototype for idea I am have, this idea works off a screen a a micro board, I do not understand much about the subject but I indent on having a screen (7") which I will be ...
1
vote
3answers
67 views

Help driving a VFD Display

I managed to pick up a few cheap VFDs (Vacuum Fluoro Displays), but the information about them is scarce. What makes matters worse is that I am a post vacuum tube era child, so my knowledge in the ...
1
vote
2answers
77 views

LED radio display - How to control multiple segments at a time?

I have a display from an old radio (I think it was a Watson). Now, there are different wires connected to it: Let's call the first two A and B and one of the others (it seems to be not so important ...
0
votes
0answers
47 views

How to correctly control contrast on a JHD202C LCD display

I have a JHD202C LCD display, for which the datasheet is available here. Please note that there are more than three pages in the PDF file, one must download it to see them. TL;DR: Which of the two ...
0
votes
1answer
70 views

Mounting a LCD display to a PCB

I'm working on a project that involves this LCD for a PCB. From the drawing, I can easily tell how to connect the pins. But I am not sure how to tell from the drawing how the display should be ...
-2
votes
2answers
141 views

Intercepting graphics card output?

I was wondering what it would take to intercept a PC's graphics card output or parts of it. First of all I'm wondering if you could even intercept the output without increasing the latency between the ...
-2
votes
4answers
123 views

Is it necessary to use resistor when connecting backlight of 16x2 LCD display?

I wonder if it's necessary to use any resistor when you're connecting backlight of 16x2 LCD module? OR it depends on voltage? I am using Hitachi HD47780
0
votes
1answer
67 views

What defines LCD display constrast?

How is a general 16x2 LCD display contrast defined? Is it with voltage on pin V0 or with total resistance of potentiometer?
1
vote
1answer
77 views

What type of display is this?

I found this display in this cheap chinese handheld tetris. It doesn't have any connectors on itself and is just sitting on small PCB with some kind of gum between them. What kind of display is it and ...
1
vote
2answers
117 views

Powering a 6-Pin DAC-08B035 LCD Inverter

i have an old LCD Panel(N141X6 -L01) from a Fujitsu Siemens laptop and an inverter(DAC-08B035) for it. Before connecting the whole thing to a raspberry pi(and buying the necessary controller board), I ...
25
votes
3answers
620 views

What is this unusual LCD controller technology?

Preface: Even if you do not have a definite answer, I would greatly like feedback from anyone who has even seen an LCD using this technology. I recently took apart a Canon digital camera from the ...
0
votes
1answer
56 views

Two voltage regulators on same circuit

Would it work if I have a lithium ion battery that's connected to a voltage regulator that's connect to a Raspberry PI then another voltage regulator to a display?
1
vote
1answer
99 views

What is the pin to light up colon in Basys 2?

I am trying to make a clock in a Basys2 board but I can't find in documentation the pin to light up the colon of the 7segment display. Where is it?
6
votes
1answer
318 views

LCD driver: What changes in 3-D mode?

Facts: We know that a system needs high data transfer speed if it works with +120 Hz refresh rate and +1080p resolution(This mostly requires DVI dual link). We know that in a 3-D system with shutter,...
0
votes
1answer
83 views

NHD-0216HZ-FSW-FBW-33V3C Black Boxes in Line LCD Display

I installed a NHD-0216HZ-FSW-FBW-33V3C with an MSP430g2553. I tried to initialize it for 4-bit mode in assembly language but black boxes still shown and initialization is not completed I think. My ...
0
votes
1answer
61 views

Energy consumption of a small TFT

I am looking to replace a 4.3 inch TFT (480*270 px - 400-500 mA @ 5V) by a more energy efficient one (other sizes welcome) to go with my raspberry pi driven handheld emulation console. What is the ...
0
votes
3answers
195 views

BPM Generator with display?

Trying to figure out how to design this with decent precision but having trouble getting this started. I've worked with 555's before but not for precise counting that can be modified in steps. I'm ...
2
votes
2answers
164 views

Error sending data to LED Display board from a microcontroller

I have a LED Display which has a RS232 connector so that we can connect it to our system. Display board accept whatever data we type in hyper terminal and display it. For e.g if I type ...
1
vote
1answer
61 views

How to connect a 4D display to a beaglebone black?

I am fairly new to all this so sorry if this question is rather trivial. I have a 4D Picasso Display (28PTU-Pi) and I want to connect it to my Beaglebone board. So plugged the usb cable into the ...
0
votes
1answer
413 views

Interfacing I2C OLED display with pic18f2550

I've been trying to interface SSD1306 I2C oled monochrome display module with PIC18F2550 micro-controller without any success. the datasheet of ssd1306 controller shows the following data format so ...
0
votes
2answers
102 views

Why LED signboards shake when I eat an apple? [duplicate]

while I was sitting in city center with so many LED (especially red ones mounted) signboards and I was bitting an apple, the signboards suddenly begin to shake for only a second while my head is ...
0
votes
2answers
296 views

Missing segments in LED fridge display [closed]

What can I try to fix this display? I assumed water vapor got into it from opening and closing the fridge door so I tried these things: I disconected it and left it in the sun for 4 hours. I ...
7
votes
2answers
2k views

How does E-Ink Work?

Can someone explain how this really works? I don't understand those bubbles, and how you get different colors on this type of screen, or it is only black&white, does it works similar to ...
0
votes
3answers
247 views

7-segment display decoder

truth table for a 7-segment display decoder. It converts a binary input x[3..0] to a 7-bit code which drives each LED in an LED display am a bit confused can anyone just give a hint i want to produce ...
0
votes
2answers
58 views

Appropriate Brightness for LED Displays

This may be a question strongly depending on application and opinion, but I'll give it a try. I am designing some controls for an industrial application, including cap touch buttons and LED 7-segment ...
2
votes
1answer
277 views

VHDL 4-display counter on a Nexys 3 (0000 to 9999)

I'm triyng to implement a 4 display counter (0 to 9999) on a Nexys 3. However, when I load the bit file, all displays remain at 0. It seems like variables a,b,c,d; which control individual digits, ...
1
vote
1answer
132 views

Using a LS248 7-segment driver, but segments are dim. Can't figure out why

I'm building a project where I want to use two double-digit 7-segment-LED displays (green, common cathode). From what I've read, a shift register wouldn't be able to source enough current, so I ...
0
votes
1answer
112 views

A possible decimal digit dvm?

I would like to build a 3x10 decimal digit dvm for an edge lit numerical display. The nearest schematic that I can find is using a CA3162E / LM74LS147 which can be found at: http://www.seekic.com/...
1
vote
1answer
169 views

LED Display: Understanding Led pitch, resolution, viewing angle and distance

i'm working on project in which we need to design a Led Display. I google some information and get a little confused about some key topics. Some of them are: Led Pitch Viewing Angle Resolution ...
1
vote
1answer
86 views

RGB matrix displays?

I'm working on firmware for LED display composed of Chinese RGB LED matrix modules (1/4 scan, 16x16, RGB). I want to find out how some pictures are displayed in three colors, is there any idea behind ...
2
votes
3answers
151 views

What is this display technology called?

I saw this display on Adafruit. They describe it as a mix of an e-ink (the low power consumption) and an LCD (the fast response time). And further as "a matt silver background, and pixels show up ...
1
vote
2answers
214 views

16 segment LED sparkfun resistor help

I am quite new to this and am struggling to read through the data sheets of the Sparkfun 16 segment display, datasheet here. I have managed to get all of the LEDs wired up through a LED driver, with ...
1
vote
1answer
130 views

What are these displays called?

I now searched the web for about an hour and just can't figure out how these displays are called or where to buy them. A lot of airports use them for the departure table. They seem to be just LED-...
3
votes
1answer
122 views

How are DACs integrated in color LCD screens?

I'm having trouble imagining what actually happens inside an LCD screen. I picture digital RGB data for each pixel getting sent to the screen through a connector. Lets say we have 24-bit color for ...
4
votes
2answers
128 views

Self Contained Temperature Display in Very High Temp Environment

I want to build a temperature sensor + display that will operate in a high temperature environment (routinely 120C, but periodically spiking to 175C, and might be exposed to 350C where it would be ...