LedBanner - Revision history

F0x: Reverted edits by F0x (talk) to last revision by Bertrik Sikken

2024-08-28T14:26:50Z

Reverted edits by F0x (talk) to last revision by Bertrik Sikken

← Older revision		Revision as of 14:26, 28 August 2024
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	=== Raspberry Pi ===		=== Raspberry Pi ===
	A Raspberry Pi is used because it can be controlled over the network, can run perl scripts and has a fast SPI port to drive the LEDs.		A Raspberry Pi is used because it can be controlled over the network, can run perl scripts and has a fast SPI port to drive the LEDs.

	~~=== Network ===~~
	~~At RevSpace, the banner is reachable on <code>10.42.76.66</code>~~

	=== Power supply ===		=== Power supply ===

F0x: revspace ip

2024-08-28T09:00:37Z

revspace ip

← Older revision		Revision as of 09:00, 28 August 2024
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	=== Raspberry Pi ===		=== Raspberry Pi ===
	A Raspberry Pi is used because it can be controlled over the network, can run perl scripts and has a fast SPI port to drive the LEDs.		A Raspberry Pi is used because it can be controlled over the network, can run perl scripts and has a fast SPI port to drive the LEDs.

			=== Network ===
			At RevSpace, the banner is reachable on <code>10.42.76.66</code>

	=== Power supply ===		=== Power supply ===

Bertrik Sikken at 19:14, 22 September 2017

2017-09-22T19:14:28Z

← Older revision		Revision as of 19:14, 22 September 2017
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	There is a simple SDL simulator of the display server that can be run stand-alone on a PC to preview led banner animations, effects, etc. The code can be found in the 'sim' subdirectory of the ledbanner repo.		There is a simple SDL simulator of the display server that can be run stand-alone on a PC to preview led banner animations, effects, etc. The code can be found in the 'sim' subdirectory of the ledbanner repo.

	=== Audio visualisation ~~(in progress)~~ ===		=== Audio visualisation ===
	A number of audio visualisation applications can be found on github in the [https://github.com/bertrik/bannervis bannervis] project.		A number of audio visualisation applications can be found on github in the [https://github.com/bertrik/bannervis bannervis] project.

Bertrik Sikken: Add link to youtube video

2014-07-30T09:32:27Z

Add link to youtube video

← Older revision		Revision as of 09:32, 30 July 2014
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	The way this works is that a squeezelite audio player runs on the raspi, using option '-v' to make the currently playing audio available in a mmap-ed file in /dev/shm. On the audio server, the audio sent to the ledbanner can be synchronised to the klusbunker.		The way this works is that a squeezelite audio player runs on the raspi, using option '-v' to make the currently playing audio available in a mmap-ed file in /dev/shm. On the audio server, the audio sent to the ledbanner can be synchronised to the klusbunker.
	The audio visualisation tools read this file and produce image frame corresponding to the audio.		The audio visualisation tools read this file and produce image frame corresponding to the audio.

			[https://www.youtube.com/watch?v=Ca-l_F9cK0c Video] of the spectrogram visualisation.

	=== Sources ===		=== Sources ===

Bertrik Sikken: Add audio visualisation text

2014-07-21T16:34:58Z

Add audio visualisation text

← Older revision		Revision as of 16:34, 21 July 2014
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	There is a simple SDL simulator of the display server that can be run stand-alone on a PC to preview led banner animations, effects, etc. The code can be found in the 'sim' subdirectory of the ledbanner repo.		There is a simple SDL simulator of the display server that can be run stand-alone on a PC to preview led banner animations, effects, etc. The code can be found in the 'sim' subdirectory of the ledbanner repo.

			=== Audio visualisation (in progress) ===
			A number of audio visualisation applications can be found on github in the [https://github.com/bertrik/bannervis bannervis] project.

			The way this works is that a squeezelite audio player runs on the raspi, using option '-v' to make the currently playing audio available in a mmap-ed file in /dev/shm. On the audio server, the audio sent to the ledbanner can be synchronised to the klusbunker.
			The audio visualisation tools read this file and produce image frame corresponding to the audio.

	=== Sources ===		=== Sources ===

Bertrik Sikken: Add game-of-life

2014-06-30T14:59:46Z

Add game-of-life

← Older revision		Revision as of 14:59, 30 June 2014
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	The following can be displayed:		The following can be displayed:
	* scrolling fixed images		* scrolling fixed images, horizontal or vertical
	* scrolling text in various colours		* scrolling text in various colours
	* animated GIFs		* animated GIFs
			* real-time generated images, e.g. game-of-life
	* etc.		* etc.

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	=== Display server ===		=== Display server ===
	To drive the LEDs, a display server written in C does the low-level driving of the LEDs over the SPI port.		To drive the LEDs, a display server written in C does the low-level driving of the LEDs over the SPI port.
	It also ~~controls~~ the white balance and ~~takes care of~~ gamma correction.		It also takes care of the white balance and gamma correction.

	A simple SDL simulator of the display server ~~has been written,~~ that can be run stand-alone on a PC to preview led banner animations, effects, etc. The code can be found in the 'sim' subdirectory of the ledbanner repo.		There is a simple SDL simulator of the display server that can be run stand-alone on a PC to preview led banner animations, effects, etc. The code can be found in the 'sim' subdirectory of the ledbanner repo.

	=== Sources ===		=== Sources ===
	* [https://github.com/bertrik/ledbanner ledbanner display server] source code		* [https://github.com/bertrik/ledbanner ledbanner display server] source code
	* [https://github.com/bertrik/nyancat nyancat], a set of small C programs to generate animated GIFs of 80x8 pixels, written specifically for the LedBanner.		* [https://github.com/bertrik/nyancat nyancat], a set of small C programs to generate animated GIFs of 80x8 pixels, written specifically for the LedBanner.
			* [https://github.com/sgielen/clife Game of Life for a 80x8 LED screen]

Bertrik Sikken: Add led banner simulator info

2014-06-29T19:15:46Z

Add led banner simulator info

← Older revision		Revision as of 19:15, 29 June 2014
Line 46:		Line 46:
	To drive the LEDs, a display server written in C does the low-level driving of the LEDs over the SPI port.		To drive the LEDs, a display server written in C does the low-level driving of the LEDs over the SPI port.
	It also controls the white balance and takes care of gamma correction.		It also controls the white balance and takes care of gamma correction.

			A simple SDL simulator of the display server has been written, that can be run stand-alone on a PC to preview led banner animations, effects, etc. The code can be found in the 'sim' subdirectory of the ledbanner repo.

	=== Sources ===		=== Sources ===
	* [https://github.com/bertrik/ledbanner ledbanner display server] source code		* [https://github.com/bertrik/ledbanner ledbanner display server] source code
	* [https://github.com/bertrik/nyancat nyancat], a set of small C programs to generate animated GIFs of 80x8 pixels, written specifically for the LedBanner.		* [https://github.com/bertrik/nyancat nyancat], a set of small C programs to generate animated GIFs of 80x8 pixels, written specifically for the LedBanner.

Bertrik Sikken: Add link to display server source code

2013-12-14T11:24:47Z

Add link to display server source code

← Older revision		Revision as of 11:24, 14 December 2013
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	=== Sources ===		=== Sources ===
			* [https://github.com/bertrik/ledbanner ledbanner display server] source code
	* [https://github.com/bertrik/nyancat nyancat], a set of small C programs to generate animated GIFs of 80x8 pixels, written specifically for the LedBanner.		* [https://github.com/bertrik/nyancat nyancat], a set of small C programs to generate animated GIFs of 80x8 pixels, written specifically for the LedBanner.

Maxell: Use mpar HTTPS

2013-09-14T15:42:17Z

Use mpar HTTPS

← Older revision		Revision as of 15:42, 14 September 2013
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	The use of a flexible banner makes it easy to transport and easy to put up.		The use of a flexible banner makes it easy to transport and easy to put up.

	[~~http~~://www.youtube.com/watch?v=c82o8A6nKjk Youtube video]		[https://www.youtube.com/watch?v=c82o8A6nKjk Youtube video]

	== Hardware ==		== Hardware ==

Bertrik Sikken: add youtube link

2013-09-09T18:32:26Z

add youtube link

← Older revision		Revision as of 18:32, 9 September 2013
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	The use of a flexible banner makes it easy to transport and easy to put up.		The use of a flexible banner makes it easy to transport and easy to put up.

			[http://www.youtube.com/watch?v=c82o8A6nKjk Youtube video]

	== Hardware ==		== Hardware ==