From bd8464abb8deee0d31bb84cc47cd3335c0e688d5 Mon Sep 17 00:00:00 2001 From: schneefux Date: Tue, 24 May 2016 19:46:37 +0200 Subject: move posts into 'tech' section --- content/post/music-led-visualisation.md | 25 ------------------------- 1 file changed, 25 deletions(-) delete mode 100644 content/post/music-led-visualisation.md (limited to 'content/post/music-led-visualisation.md') diff --git a/content/post/music-led-visualisation.md b/content/post/music-led-visualisation.md deleted file mode 100644 index f7d5c12..0000000 --- a/content/post/music-led-visualisation.md +++ /dev/null @@ -1,25 +0,0 @@ ---- -categories: -- software -date: 2016-02-13 -title: Visualize music with MPD and an LED strip ---- - -With Arduinos, 5050 RGB LED strips, Hyperion and MPD on a Raspberry Pi I created a low cost party lightning environment. - -![First test results](/images/music-led/led-floor.jpg) - -_First tests show that the setup seems to work._ - -The setup consists of cheap RGB LED strips, 2 \* 5 meters, powered by two 12V 3.5A adapters and an Arduino with three TO-120 transistors each. -For strips with 30 LEDs per meter, you need 0.5A per meter. To be safe, add additional 10% to the total. So for my 10 meters, I could also have used a single adapter with at least 5.5A. -The Arduino's GPIOs are not nearly able to supply 5.5A \* 12V = 66W, so we need transistors - either darlington transistors or MOSFETs. [Adafruit](https://learn.adafruit.com/rgb-led-strips/usage) has more information and detailed explanations. After wiring, the Arduino needs to be flashed with a software that communicates with the Raspberry Pi. I adapted a sketch that implements the Adalight protocol, you can find it [here](https://git.schneefux.xyz/?p=mpd-rgb-vis;a=blob;f=adastrip.ino;hb=HEAD). - -The Raspberry Pi as server runs [Hyperion](https://github.com/tvdzwan/hyperion) which is AmbiLight-like. On the same host, MPD outputs music to speakers and a FIFO. I wrote a Hyperion plugin that processes the output of the FIFO and thus visualizes the music that is currently be played. The plugin and more installation instructions are [here](https://git.schneefux.xyz/?p=mpd-rgb-vis;a=blob;f=README.md;hb=HEAD). In my case, I started two Hyperion daemons, because I had two Arduinos connected and it is currently not possible to output the same data to two Hyperion compatible devices. - -Initially, I planned using an ESP8266 instead of the Arduino. I had not the right parts to step down 12V to 3.3V and tried to hack something together with LEDs and a 7V-3.3V-stepdown converter. -Well… that didn't work out quite well. I used Arduino Unos instead. - -![Failed attempt of connecting an ESP8266](/images/music-led/controller-failed.jpg) - -_Do not reproduce, this fries the ESP…_ -- cgit v1.3.1