Questions tagged [dot-matrix-display]

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1 answer
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Problem with Arduino LED scroller

This is my Arduino code: ...
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2 answers
35 views

Need help identifying a component from a dot-matrix display driver board

I was checking components of a dot-matrix driver circuit board and saw these components: AR31 "330" AR27 "330" I tried searching for it online but got no good results. I found ...
2 votes
0 answers
182 views

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 ...
0 votes
1 answer
52 views

Is 4x7+dp LED segment display wired the same as 4x8 LED dot matrix?

I'm currently working on a project that need a 4x7+dp common cathode LED segments display. I have found two drivers for it that I like. #1 https://www.issi.com/WW/pdf/31FL3731.pdf #2 https://ams.com/...
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0 answers
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Esp32 (Arduino Core) And Led Control Library issue

I am using esp32 devkit v1. My project is to make music reactive leds, the sound input of which is given through the "dabble" app on my smartphone plus turning leds on based on set distance from my ...
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4 answers
287 views

How to stop current leakage in LED matrix

I know that this issue has been discussed in this forum, but I am a beginner in electronics and I was unable to come up with a solution to my problem by reading the related threads. I am doing a 3x5 ...
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1 answer
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SPI pins logic level issue [closed]

I have ESP32 and the popular dot matrix module MAX7219 8*8 module to interface. It is connected through SPI pins. After a sample word printing on the maxtix it shows garbage outputs. Is it happening ...
0 votes
1 answer
60 views

In which branch of engineering can I learn about display technologies like LCD, LED, OLED? [closed]

I am finishing high school this year and want to pursue a career where I can learn and develop display technologies like LCD, LED, OLED, and flexible displays. Can somebody please tell me what branch ...
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0 votes
1 answer
232 views

How to control a parallel OLED graphics display [closed]

I'm thinking of using a matrix OLED display like this one. This display uses a parallel interface very similar to those I've seen on text LCD displays, so I assume I'd control it in a similar way. ...
1 vote
2 answers
646 views

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
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1 answer
697 views

LED bar graph driver with 12 pins? [closed]

I wanted to use a 12 LED bar graph with a LED bar graph driver but the the driver I know (LM3914) supports only 10 LEDs. Is there a similar driver IC with more out pins? The purpose is to use the bar ...
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0 votes
1 answer
2k views

Led matrix 64x64 1/32s HUB75 with only A, B and NC lines

I am trying to drive a led matrix, a RGB 64x64 with a HUB75 connector, 1/32 scan, with 2 RGB lines (R1G1B1, R2G2B2), a latch pin, a clock pin, an output enabled pin, and 3 pins I don't know how to use ...
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0 votes
1 answer
465 views

Bit banging TFT RGB

I am replacing an EOL 240x320 TFT LCD in a existing hardware product, where the recommended replacement does not support the system 8080 MPU interface (Driver ST7789 supports it but it is not ...
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1 vote
2 answers
693 views

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 ...
1 vote
2 answers
1k views

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-...
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1 answer
389 views

How scroll led in dot matrix without using microcontroller? [closed]

I can turn ON my desired led in dot matrix. And given that i know about the trick of persistence of vision, help me.
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-2 votes
1 answer
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Is it feasible to use a logic analyser for debugging a proprietary dot matrix display and button panel for use with RaspberryPi

I have an internet radio which is not supporting the latest codecs. Details of the original radio: https://www.manualslib.com/products/Revo-Pico-Radiostation-2865277.html http://www.expertreviews....
-2 votes
1 answer
735 views

Futaba GP1006B05 VFD pinout [closed]

I have a Futaba GP1006B05 256x64 VFD display. I need the datasheet, I don't know the pinout. The pin connector is 50 pin. Does anyone have the GP1006B05 datasheet?
3 votes
2 answers
2k 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 ...
-1 votes
1 answer
236 views

Do I need resistors for Dot-Matrix LED with driver IC?

I bought a small dot-matrix board and now I am asking myself whether I need resistors for each LED or if the driver (a MAX7219EWG) supplies the correct voltage for the LEDs?
1 vote
1 answer
4k views

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 ...
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0 votes
1 answer
2k views

How to connect 5X7 LED dot matrix which has 7X7 pin both side.

I have 5X7 led dot matrix. But I am confused, how to connect it. Because it has 7 pin both the side. So, I am not going to differentiate that which is Row and column pin.
1 vote
2 answers
332 views

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 ...
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2 votes
1 answer
471 views

Dot Matrix IC message board [closed]

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/...
1 vote
2 answers
7k views

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 ...
2 votes
2 answers
8k views

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 ...
4 votes
2 answers
170 views

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 ...
8 votes
1 answer
7k views

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 ...
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3 answers
2k views

Stripboard layout for a 16x16 dot matrix display

I've been planning a Veroboard/stripboard layout for four dot matrix LED displays. Most of the complexity is due to the daft way companies break out the pins on the 8x8 modules. This is what I have so ...
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