{"id":1447,"date":"2015-05-20T11:47:42","date_gmt":"2015-05-20T10:47:42","guid":{"rendered":"https:\/\/andyland.info\/wordpress\/?p=1447"},"modified":"2016-10-13T15:26:32","modified_gmt":"2016-10-13T14:26:32","slug":"motion-sensor-to-midi-converter","status":"publish","type":"post","link":"https:\/\/andyland.info\/wordpress\/motion-sensor-to-midi-converter\/","title":{"rendered":"Motion-Sensor-to-MIDI-Converter"},"content":{"rendered":"

An idea that came up\u00a0during the 31C3. The guys from VisualPhi<\/a> had some motion sensors lying around and wanted to use them to control their VJ-software. That’s why I built them a Motion-Sensor-to-MIDI-Converter.<\/p>\n

As usual it all starts on a breadboard. Most of the times I draw the schematics parallel to building the circuit on a breadboard. Guess that’s the usual way.<\/p>\n

\"CIMG0230\"<\/a><\/p>\n

 <\/p>\n

 <\/p>\n

The circuit itself is rather unspectacular. 8 inputs are polled from a 74HC165. Then there’s a little bit of logic implemented within an Arduino and then there’s 16 LEDs, a rotary encoder and MIDI out.<\/p>\n

\"CIMG0231\"<\/a><\/p>\n

 <\/p>\n

\"CIMG0233\"<\/a><\/p>\n

 <\/p>\n

 <\/p>\n

This project is the first one to benefit from my new 3D Printer. Due to the fact that I don’t have a dedicated toolshed anymore it’s kind of impossible to reliably manufacture the case anymore. Seems as if I don’t need one from now on.<\/p>\n

\"CIMG0261\"<\/a><\/p>\n

 <\/p>\n

I really think the fixation of the rotary encoder is one of the smartest pieces ever done by mankind. Ever =)<\/p>\n

\"CIMG0264\"<\/a><\/p>\n

 <\/p>\n

\"CIMG0263\"<\/a><\/p>\n

 <\/p>\n

The LEDs are driven via Charlieplexing. It’s rather easy to implement but you really need to concentrate while soldering. By the way: If everything else fails I guess I’ll become a Soldering-Artist one day.<\/p>\n

\"CIMG0269\"<\/a><\/p>\n

 <\/p>\n

The function of the device is easy to explain. Every input is triggered when the state of a connected switch changes. This is indicated by the red LED below the channel. The green LEDs indicate the channel that’s influenced by the rotary enoder: The encoder gives the possibility to set the time that has to pass from the moment the input is triggered until it can be retriggered again. Something like a ‘Retrigger Threshold’. The value can be set to values between 0 and ~2 seconds. When the lower \/ upper limit of the value is reached the green LED flashes. Pressing the rotary encoder (it has a built-in switch) switches to the next input.<\/p>\n

A triggered input sends a MIDI note.<\/p>\n

\"CIMG0266\"<\/a><\/p>\n

 <\/p>\n

 <\/p>\n

 <\/p>\n

\"CIMG0276\"<\/a><\/p>\n

 <\/p>\n

 <\/p>\n

 <\/p>\n

\"CIMG0275\"<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"

An idea that came up\u00a0during the 31C3. The guys from VisualPhi had some motion sensors lying around and wanted to use them to control their VJ-software. That’s why I built them a Motion-Sensor-to-MIDI-Converter. As usual it all starts on a breadboard. Most of the times I draw the schematics parallel \u2026 Continue reading → <\/span><\/a><\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_links_to":"","_links_to_target":""},"categories":[20,19,5,21],"tags":[54,138,35,137],"class_list":["post-1447","post","type-post","status-publish","format-standard","hentry","category-licht","category-musik","category-projekte","category-video","tag-arduino","tag-charlieplexing","tag-midi","tag-motion-sensing","odd"],"_links":{"self":[{"href":"https:\/\/andyland.info\/wordpress\/wp-json\/wp\/v2\/posts\/1447","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/andyland.info\/wordpress\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/andyland.info\/wordpress\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/andyland.info\/wordpress\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/andyland.info\/wordpress\/wp-json\/wp\/v2\/comments?post=1447"}],"version-history":[{"count":0,"href":"https:\/\/andyland.info\/wordpress\/wp-json\/wp\/v2\/posts\/1447\/revisions"}],"wp:attachment":[{"href":"https:\/\/andyland.info\/wordpress\/wp-json\/wp\/v2\/media?parent=1447"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/andyland.info\/wordpress\/wp-json\/wp\/v2\/categories?post=1447"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/andyland.info\/wordpress\/wp-json\/wp\/v2\/tags?post=1447"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}