{"id":3993,"date":"2020-12-19T14:56:37","date_gmt":"2020-12-19T19:56:37","guid":{"rendered":"https:\/\/pugix.com\/synth\/?p=3993"},"modified":"2020-12-27T16:13:50","modified_gmt":"2020-12-27T21:13:50","slug":"quantussy-petal-board-test","status":"publish","type":"post","link":"https:\/\/pugix.com\/synth\/quantussy-petal-board-test\/","title":{"rendered":"Quantussy Petal Board Test"},"content":{"rendered":"\n<figure class=\"wp-block-image size-large\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" width=\"640\" height=\"480\" data-attachment-id=\"3994\" data-permalink=\"https:\/\/pugix.com\/synth\/quantussy-petal-board-test\/quantussy-petal-test\/\" data-orig-file=\"https:\/\/i0.wp.com\/pugix.com\/synth\/wp-content\/uploads\/2020\/12\/quantussy-petal-test.jpeg?fit=640%2C480&amp;ssl=1\" data-orig-size=\"640,480\" data-comments-opened=\"1\" data-image-meta=\"{&quot;aperture&quot;:&quot;1.8&quot;,&quot;credit&quot;:&quot;&quot;,&quot;camera&quot;:&quot;iPhone XR&quot;,&quot;caption&quot;:&quot;&quot;,&quot;created_timestamp&quot;:&quot;1608387347&quot;,&quot;copyright&quot;:&quot;&quot;,&quot;focal_length&quot;:&quot;4.25&quot;,&quot;iso&quot;:&quot;50&quot;,&quot;shutter_speed&quot;:&quot;0.016666666666667&quot;,&quot;title&quot;:&quot;&quot;,&quot;orientation&quot;:&quot;1&quot;}\" data-image-title=\"quantussy-petal-test\" data-image-description=\"\" data-image-caption=\"\" data-large-file=\"https:\/\/i0.wp.com\/pugix.com\/synth\/wp-content\/uploads\/2020\/12\/quantussy-petal-test.jpeg?fit=640%2C480&amp;ssl=1\" src=\"https:\/\/i0.wp.com\/pugix.com\/synth\/wp-content\/uploads\/2020\/12\/quantussy-petal-test.jpeg?resize=640%2C480&#038;ssl=1\" alt=\"\" class=\"wp-image-3994\" srcset=\"https:\/\/i0.wp.com\/pugix.com\/synth\/wp-content\/uploads\/2020\/12\/quantussy-petal-test.jpeg?w=640&amp;ssl=1 640w, https:\/\/i0.wp.com\/pugix.com\/synth\/wp-content\/uploads\/2020\/12\/quantussy-petal-test.jpeg?resize=500%2C375&amp;ssl=1 500w, https:\/\/i0.wp.com\/pugix.com\/synth\/wp-content\/uploads\/2020\/12\/quantussy-petal-test.jpeg?resize=220%2C165&amp;ssl=1 220w, https:\/\/i0.wp.com\/pugix.com\/synth\/wp-content\/uploads\/2020\/12\/quantussy-petal-test.jpeg?resize=250%2C188&amp;ssl=1 250w, https:\/\/i0.wp.com\/pugix.com\/synth\/wp-content\/uploads\/2020\/12\/quantussy-petal-test.jpeg?resize=355%2C266&amp;ssl=1 355w, https:\/\/i0.wp.com\/pugix.com\/synth\/wp-content\/uploads\/2020\/12\/quantussy-petal-test.jpeg?resize=90%2C68&amp;ssl=1 90w\" sizes=\"auto, (max-width: 640px) 100vw, 640px\" \/><\/figure>\n\n\n\n<p>The first petal is built and tested!  This is the PCB made by Josh Rodriquez.  It&#8217;s populated with parts values matching the real Quantussy in my Cocoquantus v1.  I&#8217;ve added an orange LED, built on one of Ken Stone&#8217; CGS_LD boards, and hooked into the petal circuit so that it blinks at the rate of the oscillator.<\/p>\n\n\n\n<p>This is one of five petals that will make up a full quantussy.  In the full configuration the petals can cross-modulate each other.  Notice the green 16-pin header, mounted in place of the CD4052 chip.  The 4052 selects one of the other petals for modulation purposes, and since it has nothing to do in this single board test, it&#8217;s replaced by this header that grounds the pins of the 4052 outputs that are buffered by op amps.<\/p>\n\n\n\n<p>I tested the frequency ranges and found that in low range the longest cycle is about 15 seconds, and in high range the highest frequency is over 20Khz.  The triangle wave output is nice and clean, which you can see on the video here.<\/p>\n\n\n\n<figure class=\"wp-block-embed is-type-video is-provider-youtube wp-block-embed-youtube wp-embed-aspect-16-9 wp-has-aspect-ratio\"><div class=\"wp-block-embed__wrapper\">\n<span class=\"embed-youtube\" style=\"text-align:center; display: block;\"><iframe loading=\"lazy\" class=\"youtube-player\" width=\"640\" height=\"360\" src=\"https:\/\/www.youtube.com\/embed\/WnwRLeMV6zQ?version=3&#038;rel=1&#038;showsearch=0&#038;showinfo=1&#038;iv_load_policy=1&#038;fs=1&#038;hl=en-US&#038;autohide=2&#038;wmode=transparent\" allowfullscreen=\"true\" style=\"border:0;\" sandbox=\"allow-scripts allow-same-origin allow-popups allow-presentation allow-popups-to-escape-sandbox\"><\/iframe><\/span>\n<\/div><\/figure>\n\n\n\n<p>The Quantussy consists of five petals, interconnected.  <\/p>\n\n\n\n<p>I drew a diagram (below) to show how the petals should interconnect.&nbsp; The triangle wave outs and ins are at the top and the castle outs and ins are on the bottom.&nbsp; I&#8217;ve shown the pin numbers of the 4052 chips, because you want the triangle out and castle out from each petal to match up when selected by another petal.<\/p>\n\n\n\n<p><br \/>For example, when petal 1 selects petal 5 (i.e. when A and B inputs on the 4052 are both 0), the triangle from 5 goes to pin 12 and the castle from 5 goes to 1 of the 4052 in petal 1.&nbsp; Look at the data sheet for the 4052 and you see that pin 12 and pin 1 are both selected to go to their respective outputs when A and B inputs are both 0.  The result is that petal 1 will be sampling petal 5&#8217;s triangle wave and putting that out on the castle, and at the same time petal 1 will be sampling petal 5&#8217;s castle and using that for its own frequency control.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full is-resized\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" data-attachment-id=\"3998\" data-permalink=\"https:\/\/pugix.com\/synth\/quantussy-petal-board-test\/quantussy-petal-interconnections\/\" data-orig-file=\"https:\/\/i0.wp.com\/pugix.com\/synth\/wp-content\/uploads\/2020\/12\/quantussy-petal-interconnections.jpeg?fit=640%2C396&amp;ssl=1\" data-orig-size=\"640,396\" data-comments-opened=\"1\" data-image-meta=\"{&quot;aperture&quot;:&quot;1.8&quot;,&quot;credit&quot;:&quot;&quot;,&quot;camera&quot;:&quot;iPhone XR&quot;,&quot;caption&quot;:&quot;&quot;,&quot;created_timestamp&quot;:&quot;1608477172&quot;,&quot;copyright&quot;:&quot;&quot;,&quot;focal_length&quot;:&quot;4.25&quot;,&quot;iso&quot;:&quot;25&quot;,&quot;shutter_speed&quot;:&quot;0.0031152647975078&quot;,&quot;title&quot;:&quot;&quot;,&quot;orientation&quot;:&quot;1&quot;}\" data-image-title=\"quantussy-petal-interconnections\" data-image-description=\"\" data-image-caption=\"\" data-large-file=\"https:\/\/i0.wp.com\/pugix.com\/synth\/wp-content\/uploads\/2020\/12\/quantussy-petal-interconnections.jpeg?fit=640%2C396&amp;ssl=1\" src=\"https:\/\/i0.wp.com\/pugix.com\/synth\/wp-content\/uploads\/2020\/12\/quantussy-petal-interconnections.jpeg?resize=640%2C396&#038;ssl=1\" alt=\"\" class=\"wp-image-3998\" width=\"640\" height=\"396\" srcset=\"https:\/\/i0.wp.com\/pugix.com\/synth\/wp-content\/uploads\/2020\/12\/quantussy-petal-interconnections.jpeg?w=640&amp;ssl=1 640w, https:\/\/i0.wp.com\/pugix.com\/synth\/wp-content\/uploads\/2020\/12\/quantussy-petal-interconnections.jpeg?resize=500%2C309&amp;ssl=1 500w, https:\/\/i0.wp.com\/pugix.com\/synth\/wp-content\/uploads\/2020\/12\/quantussy-petal-interconnections.jpeg?resize=220%2C136&amp;ssl=1 220w, https:\/\/i0.wp.com\/pugix.com\/synth\/wp-content\/uploads\/2020\/12\/quantussy-petal-interconnections.jpeg?resize=250%2C155&amp;ssl=1 250w, https:\/\/i0.wp.com\/pugix.com\/synth\/wp-content\/uploads\/2020\/12\/quantussy-petal-interconnections.jpeg?resize=355%2C220&amp;ssl=1 355w, https:\/\/i0.wp.com\/pugix.com\/synth\/wp-content\/uploads\/2020\/12\/quantussy-petal-interconnections.jpeg?resize=90%2C56&amp;ssl=1 90w\" sizes=\"auto, (max-width: 640px) 100vw, 640px\" \/><\/figure>\n","protected":false},"excerpt":{"rendered":"<p>The first petal is built and tested! This is the PCB made by Josh Rodriquez. It&#8217;s populated with parts values matching the real Quantussy in my Cocoquantus v1. I&#8217;ve added &#8230; <a class=\"styledbutton\" href=\"https:\/\/pugix.com\/synth\/quantussy-petal-board-test\/\">Read More<\/a><\/p>\n","protected":false},"author":1,"featured_media":3994,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2},"jetpack_post_was_ever_published":false},"categories":[14],"tags":[122,71,180],"class_list":["post-3993","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-projects","tag-ciat-lonbarde","tag-diy","tag-quantussy"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.6 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Quantussy Petal Board Test - Richard Brewster&#039;s Electronic Sounds<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/pugix.com\/synth\/quantussy-petal-board-test\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Quantussy Petal Board Test - Richard Brewster&#039;s Electronic Sounds\" \/>\n<meta property=\"og:description\" content=\"The first petal is built and tested! 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This is the PCB made by Josh Rodriquez. It&#8217;s populated with parts values matching the real Quantussy in my Cocoquantus v1. I&#8217;ve added ... 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