Difference between revisions of "LEDLightDistrict"

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{{Project
 
{{Project
 +
|picture=ledwall_dark.jpg
 
|ProjectSkills=soldering,coding
 
|ProjectSkills=soldering,coding
|ProjectStatus=Active
+
|ProjectStatus=Finished
 
|ProjectNiche=Electronics
 
|ProjectNiche=Electronics
 
|ProjectPurpose=World domination
 
|ProjectPurpose=World domination
 
}}
 
}}
Project to LED'ify the outside facing glass 'block' wall. each glass box will be a pixel
+
Project to LED'ify <del>the outside facing glass 'block' wall. each glass box will be a pixel</del> the space
  
The [[Pledges/LEDLightDistrict|pledge]] has been funded and the wall has been built
+
== The device ==  
== Usage ==
 
  
Plug both power supplies at either side of the wall
+
the Led-wall is currently housed in a surround that makes it look more like a proper fire-place; made of MDF , created by [[User:milo]] [[user:justa]] [[user:einstein]] for use on the UrbanResort open day of 20130921.
  
The arduino is by the power supply on the left hand side. The computer powering the server is under the retro gaming table.
+
It's been fited with a set of switches on the left hand side that operate the functions of the led-wall and/or a power-bar mounted inside the left-most column of the fireplace.
  
<insert instructions for starting python script>
+
The power-bar is supplied so that you can turn on any lamps or other 'peripherals' belonging to the fireplace with one simple action.
 +
 
 +
When turning on the fireplace, please allow one minute for the RaspPI to boot. It loads the firmware from an SD card and is not 'insta-on'
 +
 
 +
it will automatically start doing the fire. to run the all the animations
 +
 +
sudo bash ; cd /home/erik/lewd/src ; python ledshow.py -spi
 +
 
 +
 
 +
=== Doesn't work! ===
 +
 
 +
* log in to [[ledwall]] using the user techinc (pw is same as the wifi)
 +
* <code>git checkout https://github.com/techinc/lewd.git</code>
 +
* <code>for the C fireplace: cd c ; ./fire /dev/spidev0.0 (should be started automatically by /etc/rc.local)</code>
 +
* <code>for the python implementation: cd src ; python ledshow.py -spi</code>
 +
 
 +
== Hardware ==
 +
 
 +
=== Design ===
 +
 
 +
==== Overview ====
 +
 
 +
  <strong>Raspberry Pi</strong> ===(SPI)===> <strong>ledwall</strong>
 +
        ^                      ^
 +
        | (5V)                  | (12V)
 +
        \----------<strong>PSU</strong> ---------/
 +
 
 +
==== Raspi GPIO pin-out ====
 +
 
 +
The code uses the hardware SPI present on the the Raspberry Pi.
 +
 
 +
* <span style="color: green; font-weight: Bold;">Green wire</span> on <strong>Pin 23</strong> is <strong>Clock (SCLK)</strong>
 +
* <span style="color: #dddd11; font-weight: Bold;">Yellow wire</span> on <strong>Pin 19</strong> is <strong>Data (MOSI)</strong>
 +
* <span style="color: black; font-weight: Bold;">Black wire</span> <strong><del>should be connected to a ground pin.</del> does not have to be connected to the ground pin, not having a common ground works as well, and doesn't generate noise.</strong>
 +
* <span style="color: red; font-weight: Bold;">Red wire</span> <strong>should NOT be connected to the Raspi as it will break it!</strong>
 +
 
 +
[[Image:raspi_spi.jpg|480px]]
 +
 
 +
[[Image:raspi_casing.jpg|480px]]
 +
 
 +
==== PSU ====
 +
 
 +
[[Image:Ledwall_ATX.jpg|480px]]
 +
 
 +
There I fixed it X-/
 +
 
 +
[[Image:Ledwall_molex_thereifixedit.jpg|480px]]
 +
 
 +
== Software ==
  
 
== Software Implementations ==
 
== Software Implementations ==
  
There are currently two implementations. A [https://github.com/techinc/lewd python based implementation] and a [https://github.com/techinc/LedWallServer javascript node.js version]. The Python implementation runs as a daemon on the server to which both the node.js implementation and all other programs can connect using TCP sockets.
+
[https://github.com/techinc/lewd The current python based implementation called
 +
lewd] runs
 +
on the machine connected to the LED-Wall over a serial port.
  
Further node.js information can be found in the github
+
The older [https://github.com/techinc/LedWallServer javascript node.js version]
 +
can communicate with the python implementation to push frames to the LED-Wall
 +
using TCP sockets.
  
 
Python documentation (temporary location) http://old.villavu.com/merlijn/lewd
 
Python documentation (temporary location) http://old.villavu.com/merlijn/lewd
  
== Re-construction ==
+
=== Lewd ===
 +
 
 +
The Python (lewd) implementation features several backends. '''-serial''',
 +
'''-spi''', '''-net''' and '''-local''' (which renders on an SDL screen).
  
Since we have moved, we now lack a glass-block wall to mount the LED-wall onto. This means it runs the risk of being stuck in a box for infinity unless we .... build a new wall!
+
See the file "ledwall.py" for an example on how to use all these different
And with that, let me clear up that building a glass-block wall to mount the LED-wall onto is probably out of the question as glass-blocks easily cost as much as LED-modules..
+
LedWall frontends. At the space, you should typically use RemoteLedScreen to
 +
interface with the (already running) server to the LEDWall.
  
An alternative approach would be to simply go for an expedit-alike setup with smaller sections; made like a lot of drawer-organizers are made: take slats of MDF (say 5mm thick) and cut slots into them at appropriate intervals till about halfway through; slots should be 5mm wide. Fit segments together by pushing slot A into receptacle B.. etc.. You know the drill.
+
To just play around with the code locally, look into the VirtualLedScreen code;
 +
you will need to install pygame to actually use the local UI.
  
This'll be cheapish, modular, easy to make, movable.
+
==== Python documentation (temporary location) ====
  
Any ideas ?
+
http://old.villavu.com/merlijn/lewd
  
 
== Photos & Videos ==
 
== Photos & Videos ==
Line 39: Line 96:
 
File:Ledwall1.0-leds-spooned.jpg
 
File:Ledwall1.0-leds-spooned.jpg
 
File:Ledwall2.0-mount.jpg
 
File:Ledwall2.0-mount.jpg
 +
File:ledwall.jpg
 +
File:ledwall_dark.jpg
 +
File:ledwall_arduino_pinout.jpg
 +
File:Techinc_Hearth.jpg
 
</gallery>
 
</gallery>
 +
 +
== OLD ==
 +
 +
=== Alternative configuration using Arduino (Obsolete) ===
 +
 +
  <strong>computer</strong> ===(serial over usb)===> <strong>arduino</strong> ===(SPI)===> <strong>ledwall</strong>
 +
                                                            ^
 +
                                                            | (12V)
 +
                                                          <strong>PSU</strong>
 +
 +
==== Arduino code ====
 +
 +
<code lang="C">
 +
#include <SPI.h>
 +
 +
void setup()
 +
{
 +
    Serial.begin(1000000);
 +
    SPI.begin();
 +
    SPI.setBitOrder(MSBFIRST);
 +
    SPI.setDataMode(SPI_MODE0);
 +
    SPI.setClockDivider(SPI_CLOCK_DIV16);
 +
}
 +
 +
void loop()
 +
{
 +
    uint8_t c;
 +
 +
    for(;;)
 +
    {
 +
        while (!Serial.available()) {}
 +
 +
          /* 254 signals end of frame in the communication
 +
          * over the serial port
 +
          */
 +
          if ( (c = Serial.read()) == 254 )
 +
            delay(1); /* the WS2801 chips will latch after not getting
 +
                        * any data for .5ms, so we wait 1ms
 +
                        */
 +
        else
 +
            SPI.transfer(c); /* not end of frame? push data */
 +
    }
 +
}
 +
</code>
 +
 +
==== Arduino pin-out ====
 +
 +
The code uses the hardware SPI present on the the ATMega
 +
 +
* <span style="color: green; font-weight: Bold;">Green wire</span> on <strong>Pin 13</strong> is <strong>Clock</strong>
 +
* <span style="color: #dddd11; font-weight: Bold;">Yellow wire</span> on <strong>Pin 11</strong> is <strong>Data</strong>
 +
* <span style="color: black; font-weight: Bold;">Black wire</span> <strong><del>should be connected to the arduino's ground pin.</del> does not have to be connected to the ground pin, not having a common ground works as well, and doesn't generate noise.</strong>
 +
* <span style="color: red; font-weight: Bold;">Red wire</span> <strong>should NOT be connected to the arduino as it will break it!</strong>
 +
 +
[[Image:ledwall_arduino_pinout.jpg|480px]]
 +
 +
{{OnFire
 +
|IsOnFire=Definitely
 +
}}

Revision as of 00:58, 23 June 2016

Projects
Ledwall dark.jpg
Participants Guido, Wizzup
Skills soldering, coding
Status Finished
Niche Electronics
Purpose World domination

Project to LED'ify the outside facing glass 'block' wall. each glass box will be a pixel the space

The device

the Led-wall is currently housed in a surround that makes it look more like a proper fire-place; made of MDF , created by User:milo user:justa user:einstein for use on the UrbanResort open day of 20130921.

It's been fited with a set of switches on the left hand side that operate the functions of the led-wall and/or a power-bar mounted inside the left-most column of the fireplace.

The power-bar is supplied so that you can turn on any lamps or other 'peripherals' belonging to the fireplace with one simple action.

When turning on the fireplace, please allow one minute for the RaspPI to boot. It loads the firmware from an SD card and is not 'insta-on'

it will automatically start doing the fire. to run the all the animations

sudo bash ; cd /home/erik/lewd/src ; python ledshow.py -spi


Doesn't work!

  • log in to ledwall using the user techinc (pw is same as the wifi)
  • git checkout https://github.com/techinc/lewd.git
  • for the C fireplace: cd c ; ./fire /dev/spidev0.0 (should be started automatically by /etc/rc.local)
  • for the python implementation: cd src ; python ledshow.py -spi

Hardware

Design

Overview

 Raspberry Pi ===(SPI)===> ledwall
       ^                       ^
       | (5V)                  | (12V)
       \----------PSU ---------/

Raspi GPIO pin-out

The code uses the hardware SPI present on the the Raspberry Pi.

  • Green wire on Pin 23 is Clock (SCLK)
  • Yellow wire on Pin 19 is Data (MOSI)
  • Black wire should be connected to a ground pin. does not have to be connected to the ground pin, not having a common ground works as well, and doesn't generate noise.
  • Red wire should NOT be connected to the Raspi as it will break it!

Raspi spi.jpg

Raspi casing.jpg

PSU

Ledwall ATX.jpg

There I fixed it X-/

Ledwall molex thereifixedit.jpg

Software

Software Implementations

[https://github.com/techinc/lewd The current python based implementation called lewd] runs on the machine connected to the LED-Wall over a serial port.

The older javascript node.js version can communicate with the python implementation to push frames to the LED-Wall using TCP sockets.

Python documentation (temporary location) http://old.villavu.com/merlijn/lewd

Lewd

The Python (lewd) implementation features several backends. -serial, -spi, -net and -local (which renders on an SDL screen).

See the file "ledwall.py" for an example on how to use all these different LedWall frontends. At the space, you should typically use RemoteLedScreen to interface with the (already running) server to the LEDWall.

To just play around with the code locally, look into the VirtualLedScreen code; you will need to install pygame to actually use the local UI.

Python documentation (temporary location)

http://old.villavu.com/merlijn/lewd

Photos & Videos

OLD

Alternative configuration using Arduino (Obsolete)

 computer ===(serial over usb)===> arduino ===(SPI)===> ledwall
                                                           ^
                                                           | (12V)
                                                          PSU

Arduino code

#include <SPI.h>

void setup()
{
    Serial.begin(1000000);
    SPI.begin();
    SPI.setBitOrder(MSBFIRST);
    SPI.setDataMode(SPI_MODE0);
    SPI.setClockDivider(SPI_CLOCK_DIV16);
}

void loop()
{
    uint8_t c;

    for(;;)
    {
        while (!Serial.available()) {}

         /* 254 signals end of frame in the communication
          * over the serial port
          */
         if ( (c = Serial.read()) == 254 )
            delay(1); /* the WS2801 chips will latch after not getting
                       * any data for .5ms, so we wait 1ms
                       */
        else
            SPI.transfer(c); /* not end of frame? push data */
    }
}

Arduino pin-out

The code uses the hardware SPI present on the the ATMega

  • Green wire on Pin 13 is Clock
  • Yellow wire on Pin 11 is Data
  • Black wire should be connected to the arduino's ground pin. does not have to be connected to the ground pin, not having a common ground works as well, and doesn't generate noise.
  • Red wire should NOT be connected to the arduino as it will break it!

Ledwall arduino pinout.jpg

Is on Fire? Definitely