[queued] LED matrix control with Teensy 4.0

[Armin Rehberger]

LED matrix control with Teensy 4.0

https://github.com/ArminRehberger/LE...ith-Teensy-4.0

Video:
https://www.youtube.com/watch?v=ZAkksoPda_Q

Functional description:
FunctionDescriptionLEDMatrix_V1_00.pdf
FunctionDescriptionLED.pdf

Implementation of a LED matrix control. Four LED-Matrix with each 8x32 pixel Each matrix with 256 pixels, all together 1024 pixel.

[tochinet]

Hi Armin, very nice.
Can you tell me if you did a special power supply for the LEDs ? I read somewhere that USB was _not_ the way to power them, nor via the teensy. What's your experience ?

[Armin Rehberger]

Hi Armin, very nice.
Can you tell me if you did a special power supply for the LEDs ? I read somewhere that USB was _not_ the way to power them, nor via the teensy. What's your experience ?

Hello,
I used four LED-Matrix with each 8x32 LEDs.
Each matrix with 256 LEDs, all together 1024 LEDs (256LED * 4 stripes).

Used voltage: 5V
Per LED max. 60mA
1024LEDs * 60mA = 61.4A

I used two 5V 40A 200W power supplys for my four LED matrix.

Max. power supply via USB:
USB 1.0/1.1 5 V 0,1 A 0,5 W
USB 2.0 5 V 0,5 A 2,5 W
USB 3.0/3.1 (Gen1) 5 V 0,9 A 4,5 W
USB 3.1 (Gen2) 5 V 3 A 15 W

[Derek]

What version of KiCad are you using? I tried versions 5.1.9 and 6.0 Neither can open your schematic...

[Armin Rehberger]

What version of KiCad are you using? I tried versions 5.1.9 and 6.0 Neither can open your schematic...

I use the KiCAD version 6.09.
I downloaded the files from github and I could open the schematic.
You need to open the file LEDMatrix.kicad_sch

[Derek]

Question about how you wired it all up. Is the attached diagram correct? Also, what are the center wires on the matrices for?

[Derek]

I use the KiCAD version 6.09.
I downloaded the files from github and I could open the schematic.
You need to open the file LEDMatrix.kicad_sch

I downloaded them again and they worked.

I have another question...see additional post.

Thanks!

[Armin Rehberger]

I downloaded them again and they worked.

I have another question...see additional post.

Thanks!

Hello Derek,
I used these pins to control the matrixes, this match with my example program. When you use the same it should work:
7 LED matrix 1 (Output)
6 LED matrix 2 (Output)
5 LED matrix 3 (Output)
4 LED matrix 4 (Output)

You should bridge the -V pins of your two power supplies.

The additional wires on the matrixes are for:
1. Put another power supply to it (the two wires red/black), you don't need
2. Put matrixes in series together (the wires with the plug), you don't need.

Hope your matrix work now.
Kind regards Armin