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Questions tagged [led-matrix]

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I'm searching for the path and the source code for the builtin (I think) function, name is: renderBitmap(). This function appears as a member of the ArduinoLEDMatrix class but its name doesn't appear ...
Franck's user avatar
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Hi, I am using p10 Led display and trying to make digital clock. it works fine but after 2 or more weeks later without any switch off there is a overlaying start on characters. why this happening I ...
mehmet's user avatar
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I'm trying to implement an Arkanoid game on a 16x16 RGB matrix (the library is Adafruit_NeoMatrix). The blocks are 2x2 squares, and there are 3 rows with 8 blocks in each. The current state of the ...
SNBS's user avatar
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I have found a sketch in Wokwi where a MAX7219 LED matrix is used. The sketch subject is to display 0 using <LedControl.h>. I don't understand why it's nessesary to send 0 unlike 1 in fourth ...
Artur Krush's user avatar
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There's an Arduino Uno (Keyestudio KS0078) and a 788BS 8x8 LED matrix. I built the circuit as on the image and ran this program: #define MY_PERIOD 200 int displayColumn = 0; uint32_t tmr1; unsigned ...
Mik's user avatar
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good afternoon, I am making a 7x10 led matrix in which I use a CD4017 to handle the 7 rows and 2 cascaded shift registers to handle the 10 columns. I first tried a programming to turn on my entire led ...
Lucio Mazzini's user avatar
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I am making a 7x10 led matrix and I am having problems with the shiftout function. It is only able to show me the output in one shiftout register at a time. How can I fix it? For example: void setup()...
Lucio Mazzini's user avatar
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I'm an art student and absolute beginner to electronics/code - my broader goal is to learn how to control individual LEDs when there are many of them (like 64 or more even, so am learning about ...
Miso's user avatar
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I was following the official tutorial of LED matrix integration and couldn't figure out why there is no resistor. I assumed there are built-in resistors in the LED matrix, so I did an experiment by ...
Weihang Jian's user avatar
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I was following the official tutorial and confused by the source code. Arduino Official built-in example: RowColumnScanning // when the row is HIGH and the col is LOW, // the LED where they meet turns ...
Weihang Jian's user avatar
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I am working on a project for my brothers and anyone else who is interested in playing some LED Pong. I was just stuck on the software part. I don't really know what to do. But, I have an idea: I want ...
Austin's user avatar
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So I'm a beginner at Arduino and I have to light up an LED grid to show digits from 0-9. I wrote a bit of code (with the help of some people) and it's like 90% done but there's this ONE problem. I ...
BertjeDP2000's user avatar
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I have an array of 64-bit integers to display on an 8x8 led matrix const int LEN1 = sizeof(Hours); const uint64_t Hours[] = { 0x00043c3c3c3c3c00, 0x000c3c3c3c3c3c00, 0x001c3c3c3c3c3c00, ...
gio xanchkava's user avatar
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I have an ic (CT1642 1442) it's a led driver 8 bit, i want to use it with my arduino nano and i don't have any idea how to use it. If someone can help me ill be thankfull.
Abdelhak11's user avatar
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Heeya Guys! Today I created a project with the help of instructables site. I followed the on screen steps and everything. Uploaded the sketch and it works like a charm, but there's one problem. ...
Shaun_Miller's user avatar
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there i just got started with the arduino mega2560 . i tried 8x8 matrix tube and after ~30secs i found the atmega2560 a bit hot that i can melt a small amount wax on it ! is there any sort of heatsink ...
Raj's user avatar
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I built an 8x8 led matrix using white 5mm LEDs. I drive the LEDs using the MCP23017 connected to an Arduino over the I2C bus. The wiring of the LEDs in the matrix is such that a row is made up of 8 ...
S.E.K.'s user avatar
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I have an Arduino Mega set up with an 8x8 led matrix as laid out in this circuito.io project: https://www.circuito.io/static/reply/index.html?solutionId=6013e67aeaa9ed0030f668fb&solutionPath=...
Dan Forever's user avatar
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I'm working on building an LED matrix and I'm using an LED strip to create it. I've worked through a simple wiring setup using my bench top power supply and got a strip test working. Now that I have ...
Chris Schmitz's user avatar
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https://www.arduino.cc/en/Tutorial/RowColumnScanning This code really confused me because I don't know if the pixels[x][y] is HIGH or LOW in void refreshScreen(). As you look at the code, pixels[x][y] ...
Peter's user avatar
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