{"id":82,"date":"2017-04-06T11:33:25","date_gmt":"2017-04-06T17:33:25","guid":{"rendered":"http:\/\/jacobncalvert.com\/?p=82"},"modified":"2018-02-10T13:20:58","modified_gmt":"2018-02-10T19:20:58","slug":"presenting-the-midi-control-surface-rev-a","status":"publish","type":"post","link":"https:\/\/jacobncalvert.com\/blog-archive\/2017\/04\/06\/presenting-the-midi-control-surface-rev-a\/","title":{"rendered":"Presenting&#8230;. The MIDI Control Surface (Rev. A)"},"content":{"rendered":"<p>Hi all!<br \/>\nI&#8217;ve finally gotten around to posting the pics of the MIDI control service project I was working on. Here are the details on this guy:<br \/>\n<b>Total Cost to Build: ~$60 if you count the hot glue gun, $45 ish if you don&#8217;t<br \/>\nTotal Time to Build: ~A month of planning, a weekend of building, a few weeks of tweaking software<br \/>\n<\/b><\/p>\n<h3><b>How&#8217;s it made?<\/b><\/h3>\n<h4>The guts<\/h4>\n<p><b>This project has the following components:<br \/>\n<\/b><\/p>\n<ul>\n<li>1 wooden cigar box from a hobby shop ($7)<\/li>\n<li>1 clone Arduino Mega from Amazon ($9)<\/li>\n<li>4 faders and 8 pots from digikey ($18)<\/li>\n<li>1 1602A LCD from Amazon ($8)<\/li>\n<li>1 rotary knob with pushbutton from Amazon ($3)<\/li>\n<li>4 LEDs in different colors (freeee &#8211; I have a bunch already)<\/li>\n<li>1 SPDT switch from Amazon ($1)<\/li>\n<li>1 hot glue gun and hot glue sticks from hobby shop ($15)<\/li>\n<\/ul>\n<h4>Manufacturing<\/h4>\n<p>I first drew out a few templates on graph paper of what I wanted the end product to look like. Then I took each variation and taped it to the box&#8217;s top and tried to visualize using it in that form factor. Once I had decided on the way it was to be laid out, I went to the shop.<br \/>\nI taped over (with clear tape) where I would cut and drill so the layout template wouldn&#8217;t tear off, then I used a drill press to put holes in the right places and the jigsaw to my the slots and the LCD hole.<b><br \/>\n<\/b><\/p>\n<h4>The Assembly<\/h4>\n<p>The first parts I put in were the faders. I used Gorilla Glue to tack them in position, and I let them cure for about 2 days. Then I put in all the other pots, switches, and hot-glued the LCD in place. Finally I put in the LEDs and hot-glued them in place.<br \/>\n<b><br \/>\n<\/b>Here&#8217;s a picture before all the hardware was in:<br \/>\n<b><\/b><\/p>\n<div id=\"attachment_83\" style=\"width: 670px\" class=\"wp-caption alignnone\"><img aria-describedby=\"caption-attachment-83\" loading=\"lazy\" class=\"wp-image-83 size-large\" src=\"http:\/\/jacobncalvert.com\/wp-content\/uploads\/2018\/02\/midi_ctrl_surface_some_components-768x1024.jpg\" alt=\"MIDI Control Surface w\/ Some Components\" width=\"660\" height=\"880\" srcset=\"https:\/\/jacobncalvert.com\/blog-archive\/wp-content\/uploads\/2018\/02\/midi_ctrl_surface_some_components-768x1024.jpg 768w, https:\/\/jacobncalvert.com\/blog-archive\/wp-content\/uploads\/2018\/02\/midi_ctrl_surface_some_components-225x300.jpg 225w, https:\/\/jacobncalvert.com\/blog-archive\/wp-content\/uploads\/2018\/02\/midi_ctrl_surface_some_components-795x1060.jpg 795w\" sizes=\"(max-width: 660px) 100vw, 660px\" \/><p id=\"caption-attachment-83\" class=\"wp-caption-text\">MIDI Control Surface w\/ Some Components<\/p><\/div>\n<p>&nbsp;<\/p>\n<p>I used solid core wire and high quality solder to build the wiring harness. The last step in assembly was to cut a slot for the USB cable go through the side of the box and wire up the microcontroller.<\/p>\n<h4>The uC<\/h4>\n<p>I used the Arduino Mega form factor, but did not use the IDE. The code I used was AVR-libc based and was an extension of the littleKernel project I had been working on. I eventually added the optiboot bootloader so I didn&#8217;t need to pull the Mega from the box to update the code. I&#8217;ll get around to putting the code up eventually (probably).<\/p>\n<h3>What does it do?<\/h3>\n<p><b>Here, a feature list makes sense:<\/b><\/p>\n<ul>\n<li>MIDI TX and RX lights<\/li>\n<li>Power good light<\/li>\n<li>Debug light (always good to have)<\/li>\n<li>Reset switch<\/li>\n<li>12 control surfaces which can be independently mapped to different MIDI channels and Change Control numbers<\/li>\n<li>LCD and scroll knob user interface for setting up the aforementioned options<\/li>\n<li>A settings Save and Recall function using the uC EEPROM<\/li>\n<li>A settings Dump and Load function using the serial interface<\/li>\n<\/ul>\n<p><b><br \/>\n<\/b>All in all, this was a really fun project. Perhaps I&#8217;ll put up a demo of me using it with a DAW&#8230;<br \/>\nAnyhow, here are the pics of the final product and an early prototype for reference! Thanks for reading!<b><br \/>\n<\/b><\/p>\n<div id='gallery-1' class='gallery galleryid-82 gallery-columns-3 gallery-size-thumbnail'><dl class='gallery-item'>\n\t\t\t<dt class='gallery-icon portrait'>\n\t\t\t\t<a href='https:\/\/jacobncalvert.com\/blog-archive\/2017\/04\/06\/presenting-the-midi-control-surface-rev-a\/midi_ctrl_surface4\/'><img width=\"150\" height=\"150\" src=\"https:\/\/jacobncalvert.com\/blog-archive\/wp-content\/uploads\/2018\/02\/midi_ctrl_surface4-150x150.jpg\" class=\"attachment-thumbnail size-thumbnail\" alt=\"\" loading=\"lazy\" \/><\/a>\n\t\t\t<\/dt><\/dl><dl class='gallery-item'>\n\t\t\t<dt class='gallery-icon portrait'>\n\t\t\t\t<a href='https:\/\/jacobncalvert.com\/blog-archive\/2017\/04\/06\/presenting-the-midi-control-surface-rev-a\/midi_ctrl_surface3\/'><img width=\"150\" height=\"150\" src=\"https:\/\/jacobncalvert.com\/blog-archive\/wp-content\/uploads\/2018\/02\/midi_ctrl_surface3-150x150.jpg\" class=\"attachment-thumbnail size-thumbnail\" alt=\"\" loading=\"lazy\" \/><\/a>\n\t\t\t<\/dt><\/dl><dl class='gallery-item'>\n\t\t\t<dt class='gallery-icon portrait'>\n\t\t\t\t<a href='https:\/\/jacobncalvert.com\/blog-archive\/2017\/04\/06\/presenting-the-midi-control-surface-rev-a\/midi_ctrl_surface2\/'><img width=\"150\" height=\"150\" src=\"https:\/\/jacobncalvert.com\/blog-archive\/wp-content\/uploads\/2018\/02\/midi_ctrl_surface2-150x150.jpg\" class=\"attachment-thumbnail size-thumbnail\" alt=\"\" loading=\"lazy\" \/><\/a>\n\t\t\t<\/dt><\/dl><br style=\"clear: both\" \/><dl class='gallery-item'>\n\t\t\t<dt class='gallery-icon portrait'>\n\t\t\t\t<a href='https:\/\/jacobncalvert.com\/blog-archive\/2017\/04\/06\/presenting-the-midi-control-surface-rev-a\/midi_ctrl_surface1\/'><img width=\"150\" height=\"150\" src=\"https:\/\/jacobncalvert.com\/blog-archive\/wp-content\/uploads\/2018\/02\/midi_ctrl_surface1-150x150.jpg\" class=\"attachment-thumbnail size-thumbnail\" alt=\"\" loading=\"lazy\" \/><\/a>\n\t\t\t<\/dt><\/dl>\n\t\t\t<br style='clear: both' \/>\n\t\t<\/div>\n\n","protected":false},"excerpt":{"rendered":"<p>Hi all! I&#8217;ve finally gotten around to posting the pics of the MIDI control service project I was working on. Here are the details on this guy: Total Cost to Build: ~$60 if you count the hot glue gun, $45 ish if you don&#8217;t Total Time to Build: ~A month of planning, a weekend of building, a few weeks of tweaking software How&#8217;s it made? The guts This project has the following components: 1 wooden cigar box from a hobby&hellip;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[5],"tags":[11,15,12,14,13,16],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v16.4 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Presenting.... The MIDI Control Surface (Rev. 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