Questions tagged [dot-matrix-display]

A dot-matrix display is a display device used to display information on machines, clocks, railway departure indicators and many other devices requiring a simple display device of limited resolution. the display consists of a dot matrix of lights or mechanical indicators arranged in a rectangular configuration (other shapes are also possible, although not common) such that by switching on or off selected lights, text or graphics can be displayed.

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Drawing on 8x32 LED matrix with 74HC154

How do I send a pattern into an 8x32 LED matrix? I'm using the AT89S52 microcontroller with a 74HC154 4-16 line decoder, programming in C with the Keil IDE. I've done vertical scanning, but am stumped at the next step. I will include the schematic…
Rick Ant
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When an LED has a "light degredation" specification, does that means it's an OLED?

I was reading a datasheet for an LED panel, and I saw a spec for "Light Degradation" after 1000 hours. Can I assume this means it's an OLED (Organic LED), and that the organic materials will decay over time, reducing the brightness of the light? I…
The Programmer
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RS232 LED matrix programming

I managed to pick up two 16x64 unbranded LED matrix for next to nothing. My son has autism and absolutely loves LED scrolling signs so I thought it would be a nice project to build for him. They have USB and serial wires. USB only does power I…
d0little
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Refresh synchronisation with an SSD1322

Question: Is it possible to determine when the SSD1322 OLED driver module is "between redraws" of the screen? I'm thinking in a similar way to how game consoles/PCs are able to wait until the CRT scanline passes the last line on the screen and…
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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 dot user should apply 24V on pin #3 while #4 is…
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Dot Matrix IC message board

I'm trying to make a dot matrix message board -type thing work, The dot matrix IC's are the DL-57 Alpha Numeric Dot Matrix Display [Data Sheet] : https://drive.google.com/file/d/0B6Pibr6_2jwcQ2xmRUIwTjFBZ0k/edit?usp=sharing Which is pretty simple as…
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Does building my own LED screen work about as follows?

I am in India where LEDs are super cheap. I have my 256 x 256 pixel Conway "Life Machine"(TM) circuit which I am thinking to give a display nicer than that small oscilloscope screen. Each LED costs me about a penny, so 256 x 256 would cost me 655.36…
Gunther Schadow
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How to Cascade 4017 Decade Counters?

I am creating a 16 by 16 LED Matrix using 74hc595 Shift Registers to address the columns and using 4017 Decade Counters to control the row. I am using the 4017's in connection with a transistor to sink the current from the LED's. I understand how to…
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Arduino/Raspberry Pi 2 LED Matrices

Does anyone know if I can use a single Arduino or Raspberry Pi to control two 32x32 LED matrices as sold on the Adafruit website? Here is a tutorial where you can wire the 32x32 matrix. Ideally, I'd like to be able to control them separately, but if…
Oliver Spryn
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ssd1306 registers

I got confusion while reading datasheet of the OLED display(128x64).I do not understand why to use two column start registers. https://cdn-shop.adafruit.com/datasheets/SSD1306.pdf
UMID
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8x8 LED Matrix re-build

the company i work for has tasked me in rebuilding an old LED sign we had replaced. (newer led rgb version) The driver board that was in the sign has gone out. So i am trying to rebuild the driver boards. The boards are 8x8 for a total of 64 leds…
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Why does the ssd1306 OLED controller have an unusual memory layout?

I've recently ported a driver for the ssd1306 OLED controller. https://cdn-shop.adafruit.com/datasheets/SSD1306.pdf http://www.ebay.co.uk/itm/0-96-inch-128x64-I2C-Interface-White-Color-OLED-Display-Module-for-Arduino-/382142082022 When writing to…
fadedbee
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P10 Outdoor RGB DIP LED Module

As I have to make driver for this matrix module, I have a big problem finding its schematic or datasheet. There are many similar modules on the internet, they are made in China. I'm making driver on our hardware engineer assumption, and its going…
user76920
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Sendingdata on display

I have 132x65 dot matrix LCD. I am using STM32f303 controller in my application. I got success in displaying the normal 5x7 fonts on LCD. Now I what I want to do is to display 13x16 custom sized fonts on the LCD. I generated the appropriate hex…
spp
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