Questions tagged [led-matrix]
The led-matrix tag has no summary.
20 questions
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2
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LED Matrix for Arduino R4 Wi-Fi specific functions
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 ...
- 25
0
votes
1
answer
134
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Arduino Nano spontaneously stops working and disconnects from computer [closed]
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 ...
- 143
1
vote
2
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307
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Why doesn't this code for an 8x8 LED matrix work properly?
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 ...
- 149
0
votes
2
answers
516
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Shiftout only handles one shift register at a time
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()...
- 105
0
votes
1
answer
1k
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Are resistors necessary for 8x8 LED matrix?
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 ...
- 161
2
votes
1
answer
104
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How do I recreate the Pong game with two pots and the map function?
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 ...
- 116
1
vote
1
answer
355
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how to display text to 8x8 matrix with 64-bit long integers?
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,
...
2
votes
2
answers
1k
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DS3231 Clock project shows right date but wrong day
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.
...
- 21
1
vote
0
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92
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How to get a stable LED lighting without scintillation over I2C bus
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 ...
- 53
2
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0
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73
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Possible impedance problem when moving to new power supply
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 ...
- 357