Differences

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--- hacks:led_wall [2018/03/21 03:42] – i-make-robots
+++ hacks:led_wall [2019/04/07 16:58] – 00739
@@ Line 1: / Line 1: @@
-===== LED Wall ======
+====== LED Wall ======
-=== Circuit ===
+==== Circuit ====
 The current LED Wall (as of Fall, 2014) is 768 WS2811 LEDs in a 32x24 grid.  The LEDs are in twelve 8x8 panels where the first LED is in the top left and goes down, then right one, and back up, repeating.  This snake pattern continues across four panels, then restarts on the next set of four.  This is because the original panels were separate pieces and built from recycled leftovers.
-=== Power ===
+==== Power ====
 The LEDs draw ~60ma each.  60ma*768=4.6A, so a 5v5a power supply is used to power the three rows of grids.
-=== Brain ===
+==== Brain ====
 The LEDs are told what to do through a Teensy 3.1 connected to a Raspberry Pi.  By connecting to the Pi you can either use [[https://platformio.org/get-started/cli|PlatformIO]] or the Arduino build environment to change the animations on the wall.
-=== Network ==
+==== Network ====
 The Raspberry Pi is on the network, nominally at 172.16.6.2.  The login user is 'pi' and the password is 'raspberry'.  Once logged in a user can call
@@ Line 21: / Line 21: @@
 See also [[http://docs.platformio.org/en/latest/quickstart.html|the PlatformIO quickstart guide]]
-=== proposed project ====
+==== proposed project =====
 The teensy has previously been programmed to accept data from the pi as a bitstream and send whatever it gets to the wall, no exceptions.  it listens for a maximum of 768 RGB values (3 bytes each).  RGB tuples can be any color except black (0).  an all black pixel (0,0,0) signals the start of a new frame.  in this way video was streamed from a laptop to the wall, making it into a low-res jumbotron.