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       <dc:date>2026-04-15T04:52:30+00:00</dc:date>
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        <dc:date>2020-05-12T16:56:09+00:00</dc:date>
        <dc:creator>Anonymous (anonymous@undisclosed.example.com)</dc:creator>
        <title>raspberry:audio_injector</title>
        <link>https://dernulleffekt.de/doku.php?id=raspberry:audio_injector&amp;rev=1589295369&amp;do=diff</link>
        <description>Audio Injector Installation

Audio Injector Stereo Soundcard and the Raspberry Zero Soundcard by Audio Injector are audio hats for the Raspberry Pi. These sound cards comes with two inputs and two outputs, plus a build in microphone.


----------

Installation

This manual is made for an Raspberry Pi 4 running Raspian Buster on it. It's also tested with a Raspberry Pi Zero running Raspian Buster.</description>
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        <dc:date>2020-12-14T14:35:14+00:00</dc:date>
        <dc:creator>Anonymous (anonymous@undisclosed.example.com)</dc:creator>
        <title>raspberry:audio_stream</title>
        <link>https://dernulleffekt.de/doku.php?id=raspberry:audio_stream&amp;rev=1607952914&amp;do=diff</link>
        <description>Audio Stream

Streaming audio over internet using Icecast and Darkice on a Raspberry Pi 3 and RaspbianStretch.


----------

Soundcard

check the soundcard:
$ cat /proc/asound/modules
and 
$ cat /proc/asound/cards
that could look like that:
0 [ALSA           ]: bcm2835_alsa - bcm2835 ALSA
                    bcm2835 ALSA
1 [K6             ]: USB-Audio - Komplete Audio 6
                    Native Instruments Komplete Audio 6 at usb-3f980000.usb-1.5, high speed</description>
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        <dc:date>2020-10-16T21:58:20+00:00</dc:date>
        <dc:creator>Anonymous (anonymous@undisclosed.example.com)</dc:creator>
        <title>raspberry:dac_mcp4802-22</title>
        <link>https://dernulleffekt.de/doku.php?id=raspberry:dac_mcp4802-22&amp;rev=1602878300&amp;do=diff</link>
        <description>Digital Analog Converter - MCP4802/22

The MCP4802 is a dual 8-Bit Digital Analog Converter with SPI interface. The MCP4822 is the 12-Bit version.


MCP4802/22 datasheet

----------

WiringPi and the MCP 4802

To connect the MCP 4802  to the Raspberry Pi connect the SPI pins of the MCP4802 like that:</description>
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        <dc:date>2020-12-14T14:36:38+00:00</dc:date>
        <dc:creator>Anonymous (anonymous@undisclosed.example.com)</dc:creator>
        <title>raspberry:netcat_stream</title>
        <link>https://dernulleffekt.de/doku.php?id=raspberry:netcat_stream&amp;rev=1607952998&amp;do=diff</link>
        <description>Direct TCP Stream with Netcat

Enable the camera and type in these comands.

On the Raspberry Pi:
 $ raspivid -t 0 -l -o - | nc -k -l 5000
On the client computer:
 $ mplayer -x 1920 -y 1080 -geometry 0:0 -fps 50 -demuxer h264es -noborder ffmpeg://tcp://192.168.178.129:5000</description>
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        <dc:date>2020-05-12T16:56:27+00:00</dc:date>
        <dc:creator>Anonymous (anonymous@undisclosed.example.com)</dc:creator>
        <title>raspberry:pd_autostart_desktop</title>
        <link>https://dernulleffekt.de/doku.php?id=raspberry:pd_autostart_desktop&amp;rev=1589295387&amp;do=diff</link>
        <description>Autostart with the Desktop

Sometimes one needs the X Windows system to run a Pure Data patch on a Raspberry Pi. This is the workaround for an autostart of a PD patch after booting in the desktop.

Make a Autostart File

Make the folder and the file for the autostart:</description>
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        <dc:date>2020-05-12T16:56:36+00:00</dc:date>
        <dc:creator>Anonymous (anonymous@undisclosed.example.com)</dc:creator>
        <title>raspberry:pd_autostart_headless</title>
        <link>https://dernulleffekt.de/doku.php?id=raspberry:pd_autostart_headless&amp;rev=1589295396&amp;do=diff</link>
        <description>Autostart without the Desktop

That is a workaround for running a PD patch on a headless Raspberry Pi without any desktop.

Open this file:

  $ sudo nano /etc/rc.local
And type the following lines before the exit 0:

  pd -nogui /home/pi/PD-sketchbook/my_pd_patch.pd &amp;</description>
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        <dc:date>2020-03-05T17:37:17+00:00</dc:date>
        <dc:creator>Anonymous (anonymous@undisclosed.example.com)</dc:creator>
        <title>raspberry:pi_ogg_player</title>
        <link>https://dernulleffekt.de/doku.php?id=raspberry:pi_ogg_player&amp;rev=1583426237&amp;do=diff</link>
        <description>Pi-OGG-Player

This is the workaround for a touch screen OGG PLayer based on a Raspberry Pi with the Raspberry Pi Touch Display. 10 of these players were used in the exhibition Stolen Moments at the IWALEWAHAUS in Bayreuth 2017.


The OGG file player was made with pygame for Raspbian Jessy.</description>
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        <dc:format>text/html</dc:format>
        <dc:date>2016-10-25T02:22:36+00:00</dc:date>
        <dc:creator>Anonymous (anonymous@undisclosed.example.com)</dc:creator>
        <title>raspberry:pi_radio</title>
        <link>https://dernulleffekt.de/doku.php?id=raspberry:pi_radio&amp;rev=1477354956&amp;do=diff</link>
        <description>Pi-Radio

Image: 2016-09-23-raspbian-jessie-lite.img

IP Address: 192.168.0.121

PW:st0lenm0ments

----------

Upgrade
$ sudo raspi-config$ sudo apt-get update
$ sudo apt-get upgrade

$ sudo apt-get install htop python-pip idle idle3
----------

Mount USB Stick</description>
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        <dc:date>2022-02-02T22:17:04+00:00</dc:date>
        <dc:creator>Anonymous (anonymous@undisclosed.example.com)</dc:creator>
        <title>raspberry:pi_zero_usb-otg</title>
        <link>https://dernulleffekt.de/doku.php?id=raspberry:pi_zero_usb-otg&amp;rev=1643836624&amp;do=diff</link>
        <description>Pi Zero always On-The-Go

a USB-OTG Hack




If one needs to connect different devices to a Raspberry Pi Zero but want's to use just one USB port one can use an USB On-The-Go (OTG) cable.


This USB mod was developed for the Real Existing Tokke for the artwork:</description>
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        <dc:date>2020-05-12T16:56:17+00:00</dc:date>
        <dc:creator>Anonymous (anonymous@undisclosed.example.com)</dc:creator>
        <title>raspberry:pifi_sound_card</title>
        <link>https://dernulleffekt.de/doku.php?id=raspberry:pifi_sound_card&amp;rev=1589295377&amp;do=diff</link>
        <description>PiFi Sound Card




The PiFi DAC+ is a cheap Chinese clone of the HiFi Berry DAC+ Standard made by ukonline2000. It's based on the I2S digital audio converter (DAC) chip PCM5122.

The drivers are already included in the kernel, to activate them check:


	*  for the 3.12 kernel</description>
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        <dc:date>2020-03-05T17:42:36+00:00</dc:date>
        <dc:creator>Anonymous (anonymous@undisclosed.example.com)</dc:creator>
        <title>raspberry:raspberry_cleaning</title>
        <link>https://dernulleffekt.de/doku.php?id=raspberry:raspberry_cleaning&amp;rev=1583426556&amp;do=diff</link>
        <description>Remove Unused Software

from a Raspian Buster (Debian 10)

After burning a new SD card one finds quite a huge, already installed software package. To get more space on the SD card one can remove all unloved and unused packages. For example these:

 $ sudo apt update
 $ sudo apt remove --purge claws-mail minecraft libreoffice-core wolfram-engine
 $ sudo apt autoremove</description>
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        <dc:format>text/html</dc:format>
        <dc:date>2021-09-03T11:48:24+00:00</dc:date>
        <dc:creator>Anonymous (anonymous@undisclosed.example.com)</dc:creator>
        <title>raspberry:raspberry_main</title>
        <link>https://dernulleffekt.de/doku.php?id=raspberry:raspberry_main&amp;rev=1630662504&amp;do=diff</link>
        <description>Projects with and for the Raspberry Pi

Embedded Art System


Raspberry Pi Hats:

	*  Raspi-PD Control Hat

	*  Raspi-Sonic-Hat
	*  Raspberry Basic Hat
	*  Raspberry Pi VGA-Board
	*  Paper-Duino-Hat

Streaming:

	*  Web Stream with UV4L
	*  Audio Stream with Icecast2
	*  Streaming Client with W3M
	*  Direct TCP Stream with Netcat

Sound Cards:

	*  PiFi Sound Card
	*  Audio Injector Installation

Pure Data:

	*  Pure Data on Raspberry Pi

Auto Start:

	*  Autostart with the Desktop

	*  Autostar…</description>
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        <dc:format>text/html</dc:format>
        <dc:date>2021-05-27T14:23:07+00:00</dc:date>
        <dc:creator>Anonymous (anonymous@undisclosed.example.com)</dc:creator>
        <title>raspberry:read_only</title>
        <link>https://dernulleffekt.de/doku.php?id=raspberry:read_only&amp;rev=1622118187&amp;do=diff</link>
        <description>Read-Only SD Card

If one needs a Raspberry Pi that shuts down save by just unplugging and without having the risk of corrupting the SD card one has to change the SD card to a read-only mode.


----------

Drives

In the fstab:
$ sudo nano /etc/fstab</description>
    </item>
    <item rdf:about="https://dernulleffekt.de/doku.php?id=raspberry:shader&amp;rev=1630663140&amp;do=diff">
        <dc:format>text/html</dc:format>
        <dc:date>2021-09-03T11:59:00+00:00</dc:date>
        <dc:creator>Anonymous (anonymous@undisclosed.example.com)</dc:creator>
        <title>raspberry:shader</title>
        <link>https://dernulleffekt.de/doku.php?id=raspberry:shader&amp;rev=1630663140&amp;do=diff</link>
        <description>Shader

&lt;http://www.thebookofshaders.com/&gt;

Patricio Gonzalez Vivo &amp; Jen Lowe -  The book of shaders


Slimshader by erikoostveen.co.uk



Erik Oostveen


“SlimShader is an Open Source Raspberry PI project based on glslViewer** capable of displaying OpenGL/GLSL shader files (stills or motion graphics). Shader files can be displayed “as is” or controlled in various ways: Manually (knobs), LFO (three digital low frequency oscillators), MIDI, Audio or CV. In this video we see the</description>
    </item>
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        <dc:format>text/html</dc:format>
        <dc:date>2020-12-14T14:35:01+00:00</dc:date>
        <dc:creator>Anonymous (anonymous@undisclosed.example.com)</dc:creator>
        <title>raspberry:streaming_client</title>
        <link>https://dernulleffekt.de/doku.php?id=raspberry:streaming_client&amp;rev=1607952901&amp;do=diff</link>
        <description>Streaming Client

W3M

To run a stream in a terminal of a Raspberry Pi one can use the W3M browser.

Just start the Raspberry Pi to the console and run W3M with your web address.


----------

Installation
$ sudo apt-get update
$ sudo apt-get install w3m w3m-img</description>
    </item>
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        <dc:format>text/html</dc:format>
        <dc:date>2019-02-14T01:40:20+00:00</dc:date>
        <dc:creator>Anonymous (anonymous@undisclosed.example.com)</dc:creator>
        <title>raspberry:vga_board</title>
        <link>https://dernulleffekt.de/doku.php?id=raspberry:vga_board&amp;rev=1550104820&amp;do=diff</link>
        <description>VGA Board

&lt;https://learn.pi-supply.com/make/gert-vga-666-assembly-tips-and-gotchas/&gt;


On the command edit:

 $ sudo nano /boot/config.txt
Then add these lines at the bottom of the file:

 dtoverlay=vga666
 enable_dpi_lcd=1
 display_default_lcd=1
You also need to specify your screen resolution. After the lines you added above you will also have to then add one of the following configurations:</description>
    </item>
    <item rdf:about="https://dernulleffekt.de/doku.php?id=raspberry:videolooper&amp;rev=1623082068&amp;do=diff">
        <dc:format>text/html</dc:format>
        <dc:date>2021-06-07T18:07:48+00:00</dc:date>
        <dc:creator>Anonymous (anonymous@undisclosed.example.com)</dc:creator>
        <title>raspberry:videolooper</title>
        <link>https://dernulleffekt.de/doku.php?id=raspberry:videolooper&amp;rev=1623082068&amp;do=diff</link>
        <description>Raspi Video Looper

This is a manual for a simple video-loop-player based on a Raspberry Pi (Zero).


Burn and Config

Burn a Raspberry Pi OS Lite on an SD card. And boot up  your Raspberry and connect it to your local net.

(If you want to connect your Raspberry Pi Zero over an USB cable follow this manual:</description>
    </item>
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        <dc:format>text/html</dc:format>
        <dc:date>2020-12-14T14:36:08+00:00</dc:date>
        <dc:creator>Anonymous (anonymous@undisclosed.example.com)</dc:creator>
        <title>raspberry:web_stream</title>
        <link>https://dernulleffekt.de/doku.php?id=raspberry:web_stream&amp;rev=1607952968&amp;do=diff</link>
        <description>Web Stream

with UV4L

&lt;http://www.linux-projects.org/uv4l/&gt;

&lt;http://www.linux-projects.org/uv4l/installation/&gt;


Installation:

$ curl http://www.linux-projects.org/listing/uv4l_repo/lrkey.asc | sudo apt-key add - 
$ sudo nano /etc/apt/sources.list
coppy &amp; paste: 
deb http://www.linux-projects.org/listing/uv4l_repo/raspbian/ jessie main
$ sudo apt-get update
$ sudo apt-get install uv4l uv4l-raspicam uv4l-raspicam-extras uv4l-server</description>
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        <dc:format>text/html</dc:format>
        <dc:date>2020-03-05T17:30:13+00:00</dc:date>
        <dc:creator>Anonymous (anonymous@undisclosed.example.com)</dc:creator>
        <title>raspberry:wiring_gpio_clock</title>
        <link>https://dernulleffekt.de/doku.php?id=raspberry:wiring_gpio_clock&amp;rev=1583425813&amp;do=diff</link>
        <description>Clock around the GPIOs

No need for an external crystal, one can use the GPIOs of the Raspberry Pi to generate a clock signal. The library wiring makes it easy and accessible.



Wiring for the Raspberry Pi was written by Gordon Henderson.


Install Wiring</description>
    </item>
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        <dc:format>text/html</dc:format>
        <dc:date>2020-03-05T17:25:29+00:00</dc:date>
        <dc:creator>Anonymous (anonymous@undisclosed.example.com)</dc:creator>
        <title>raspberry:wiring_max5322</title>
        <link>https://dernulleffekt.de/doku.php?id=raspberry:wiring_max5322&amp;rev=1583425529&amp;do=diff</link>
        <description>Wiring and the MAX 5322 DAC

FIXME

The MAX5322 is an dual 12bit SPI digital to analog converter. One can use this DAC over the GPIO pins of the Raspberry Pi with Wiring. Wiring for the Raspberry Pi was written by Gordon Henderson.


----------

Install Wiring

In the terminal:</description>
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        <dc:format>text/html</dc:format>
        <dc:date>2021-05-31T22:55:40+00:00</dc:date>
        <dc:creator>Anonymous (anonymous@undisclosed.example.com)</dc:creator>
        <title>raspberry:zero_over_usb</title>
        <link>https://dernulleffekt.de/doku.php?id=raspberry:zero_over_usb&amp;rev=1622494540&amp;do=diff</link>
        <description>Connect a Raspberry Pi Zero over USB

This is a manual for connecting a Raspberry Pi Zero to your computer via USB.
After burning the image on your SD card one has to add the USB driver on startup. 


Enable SSH on the Raspberry Pi in:

$ sudo raspi-config</description>
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