View source for Arduino Led Matrix 8x7 WS2811

== Introduction ==

Make a 7x8 led matrix using WS2811 led strips.

<youtube>
fs73YUW-ojk
</youtube>

== Theory ==

=== Building the box ===

=== Wiring ===

Be careful to wire +5V to +5V (I broke one led). Soldering the leds is manageable: add the solder to both the led connector and to the wire, the attach the wire to the led connector and warm it using the soldering iron. 

<gallery>
Arduino WS2811 Programming.svg | Programming. No +5V is needed.
Arduino WS2811 RunningOnly.svg | Running only. 
</gallery>

== Programming ==

The programs are in the github: 

* See the gist file for a sample code to show some letters:  https://gist.github.com/markkuleino/65c1d48b05597e7f92b15a47b3d49435
* The 7x8 font https://github.com/ileskanRepot/Arduino_RGB_WS2811_8_leds/blob/master/wave/wave.c/letters.h
* Turn the bits on randomly https://gist.github.com/markkuleino/294b4248aa3d154f179ef8b6f625ac40
* Scrolling letters https://gist.github.com/markkuleino/ab8b2895274c98e61e2cf11834ff8583

=== Debugging ===

<syntaxhighlight lang="C">
void setup() {
  Serial.begin(9600); // open the serial port at 9600 bps:
}
void loop(){
Serial.print();
}
</syntaxhighlight>