{"id":1329,"date":"2015-01-08T11:10:22","date_gmt":"2015-01-08T16:10:22","guid":{"rendered":"http:\/\/pugix.com\/synth\/?p=1329"},"modified":"2020-02-16T15:12:33","modified_gmt":"2020-02-16T20:12:33","slug":"rollz-5-assembly-progress","status":"publish","type":"post","link":"https:\/\/pugix.com\/synth\/rollz-5-assembly-progress\/","title":{"rendered":"Rollz-5 Assembly Progress"},"content":{"rendered":"<p>The Meng Qi <a title=\"Rollz 5 Schematics\" href=\"http:\/\/pugix.com\/synth\/rollz-5-schematics\/\" target=\"_blank\" rel=\"noopener noreferrer\">Rollz-5 PC board project<\/a> in mid-assembly stage.<br \/>\n<a href=\"https:\/\/i0.wp.com\/pugix.com\/synth\/wp-content\/uploads\/2015\/01\/rollz-5-prewiring.jpg?ssl=1\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" data-attachment-id=\"1333\" data-permalink=\"https:\/\/pugix.com\/synth\/rollz-5-assembly-progress\/rollz-5-prewiring\/\" data-orig-file=\"https:\/\/i0.wp.com\/pugix.com\/synth\/wp-content\/uploads\/2015\/01\/rollz-5-prewiring.jpg?fit=1000%2C750&amp;ssl=1\" data-orig-size=\"1000,750\" data-comments-opened=\"1\" data-image-meta=\"{&quot;aperture&quot;:&quot;0&quot;,&quot;credit&quot;:&quot;&quot;,&quot;camera&quot;:&quot;&quot;,&quot;caption&quot;:&quot;&quot;,&quot;created_timestamp&quot;:&quot;0&quot;,&quot;copyright&quot;:&quot;&quot;,&quot;focal_length&quot;:&quot;0&quot;,&quot;iso&quot;:&quot;0&quot;,&quot;shutter_speed&quot;:&quot;0&quot;,&quot;title&quot;:&quot;&quot;,&quot;orientation&quot;:&quot;0&quot;}\" data-image-title=\"rollz-5-prewiring\" data-image-description=\"\" data-image-caption=\"\" data-large-file=\"https:\/\/i0.wp.com\/pugix.com\/synth\/wp-content\/uploads\/2015\/01\/rollz-5-prewiring.jpg?fit=1000%2C750&amp;ssl=1\" class=\"aligncenter size-medium wp-image-1333\" src=\"https:\/\/i0.wp.com\/pugix.com\/synth\/wp-content\/uploads\/2015\/01\/rollz-5-prewiring.jpg?resize=500%2C375&#038;ssl=1\" alt=\"rollz-5-prewiring\" width=\"500\" height=\"375\" srcset=\"https:\/\/i0.wp.com\/pugix.com\/synth\/wp-content\/uploads\/2015\/01\/rollz-5-prewiring.jpg?resize=500%2C375&amp;ssl=1 500w, https:\/\/i0.wp.com\/pugix.com\/synth\/wp-content\/uploads\/2015\/01\/rollz-5-prewiring.jpg?w=1000&amp;ssl=1 1000w\" sizes=\"auto, (max-width: 500px) 100vw, 500px\" \/><\/a>The image above shows the PC board mounted behind a clear plexiglass panel that holds pots, jacks, switches, etc., sitting inside of the yellow case that will hold everything.&nbsp; No panel wiring yet!&nbsp;&nbsp; All wires will be visible behind the panel, going to the PC board.&nbsp; An additional hand-built board will mount to the right and hold a voltage regulator and output mixer.&nbsp; Here&#8217;s a pic of just the panel.<\/p>\n<p><a href=\"https:\/\/i0.wp.com\/pugix.com\/synth\/wp-content\/uploads\/2015\/01\/rollz-5-panel.jpg?ssl=1\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" data-attachment-id=\"1332\" data-permalink=\"https:\/\/pugix.com\/synth\/rollz-5-assembly-progress\/rollz-5-panel\/\" data-orig-file=\"https:\/\/i0.wp.com\/pugix.com\/synth\/wp-content\/uploads\/2015\/01\/rollz-5-panel.jpg?fit=1000%2C750&amp;ssl=1\" data-orig-size=\"1000,750\" data-comments-opened=\"1\" data-image-meta=\"{&quot;aperture&quot;:&quot;0&quot;,&quot;credit&quot;:&quot;&quot;,&quot;camera&quot;:&quot;&quot;,&quot;caption&quot;:&quot;&quot;,&quot;created_timestamp&quot;:&quot;0&quot;,&quot;copyright&quot;:&quot;&quot;,&quot;focal_length&quot;:&quot;0&quot;,&quot;iso&quot;:&quot;0&quot;,&quot;shutter_speed&quot;:&quot;0&quot;,&quot;title&quot;:&quot;&quot;,&quot;orientation&quot;:&quot;0&quot;}\" data-image-title=\"rollz-5-panel\" data-image-description=\"\" data-image-caption=\"\" data-large-file=\"https:\/\/i0.wp.com\/pugix.com\/synth\/wp-content\/uploads\/2015\/01\/rollz-5-panel.jpg?fit=1000%2C750&amp;ssl=1\" class=\"aligncenter size-medium wp-image-1332\" src=\"https:\/\/i0.wp.com\/pugix.com\/synth\/wp-content\/uploads\/2015\/01\/rollz-5-panel.jpg?resize=500%2C375&#038;ssl=1\" alt=\"rollz-5-panel\" width=\"500\" height=\"375\" srcset=\"https:\/\/i0.wp.com\/pugix.com\/synth\/wp-content\/uploads\/2015\/01\/rollz-5-panel.jpg?resize=500%2C375&amp;ssl=1 500w, https:\/\/i0.wp.com\/pugix.com\/synth\/wp-content\/uploads\/2015\/01\/rollz-5-panel.jpg?w=1000&amp;ssl=1 1000w\" sizes=\"auto, (max-width: 500px) 100vw, 500px\" \/><\/a>I&#8217;ve enhanced the PC board to provide auxiliary inputs and outputs, more panel controls, plus an output mixer, to make it into a small, self-contained synthesizer.&nbsp; To the left are the eight 2-Rollz LFOs, each with two brown jacks for the nodes, an LED and an orange jack for the positive going output pulse.&nbsp; Each LFO has a different, fixed rate.&nbsp; Next to the right are four doubles rows of jacks and controls, consisting of 1 AVDog, 1 Ultrasound, and 1 Gong for 4 total of each module.<\/p>\n<p>AVDog<\/p>\n<ul>\n<li>Green jack &#8211; Input pulse to trigger the envelope<\/li>\n<li>White jack &#8211; VCA out<\/li>\n<li>Violet jack &#8211; Aux VCA in<\/li>\n<li>Yellow jack &#8211; Oscillator out<\/li>\n<li>Red knob &#8211; Envelope rate<\/li>\n<li>Blue knob &#8211; Envelope Q<\/li>\n<li>Yellow switch &#8211; selects internal oscillator or aux input to the VCA<\/li>\n<li>Yellow knob &#8211; Oscillator frequency<\/li>\n<\/ul>\n<p>Ultrasound<\/p>\n<ul>\n<li>Green jack &#8211; In<\/li>\n<li>White jack &#8211; Out<\/li>\n<li>Yellow jack &#8211; Oscillator out<\/li>\n<li>Yellow knob &#8211; Oscillator frequency<\/li>\n<\/ul>\n<p>Gong<\/p>\n<ul>\n<li>Green jack &#8211; Input pulse to ring the filter<\/li>\n<li>White jack &#8211; Filter out<\/li>\n<li>Violet jack &#8211; Aux filter in<\/li>\n<li>Green knob &#8211; Pulse delay time<\/li>\n<li>Red knob &#8211; Filter frequency<\/li>\n<li>Blue knob &#8211; Filter Q<\/li>\n<\/ul>\n<p>To the far right are six gray knobs.&nbsp; These are the output mixer.&nbsp; Each knob controls the level of two devices, for example the top knob sends the topmost AVDog to the left output and the second AVDog to the right output.&nbsp; Ultrasounds and Gongs are also paired.&nbsp; This is like the output mixer on Plumbutter.&nbsp; Note that the outputs are independently available at full level on the white jacks for patching.&nbsp; This is also similar to Plumbutter, but the Ultrasounds also have white jacks here.&nbsp; Note the lack of CV inputs.&nbsp; Rollz-5 is not voltage controlled (except for the internal VCA in AVDog).<\/p>\n<p><a href=\"https:\/\/i0.wp.com\/pugix.com\/synth\/wp-content\/uploads\/2015\/01\/rollz-5-whole-board-unwired.jpg?ssl=1\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" data-attachment-id=\"1336\" data-permalink=\"https:\/\/pugix.com\/synth\/rollz-5-assembly-progress\/rollz-5-whole-board-unwired\/\" data-orig-file=\"https:\/\/i0.wp.com\/pugix.com\/synth\/wp-content\/uploads\/2015\/01\/rollz-5-whole-board-unwired.jpg?fit=1000%2C790&amp;ssl=1\" data-orig-size=\"1000,790\" data-comments-opened=\"1\" data-image-meta=\"{&quot;aperture&quot;:&quot;0&quot;,&quot;credit&quot;:&quot;&quot;,&quot;camera&quot;:&quot;&quot;,&quot;caption&quot;:&quot;&quot;,&quot;created_timestamp&quot;:&quot;0&quot;,&quot;copyright&quot;:&quot;&quot;,&quot;focal_length&quot;:&quot;0&quot;,&quot;iso&quot;:&quot;0&quot;,&quot;shutter_speed&quot;:&quot;0&quot;,&quot;title&quot;:&quot;&quot;,&quot;orientation&quot;:&quot;0&quot;}\" data-image-title=\"rollz-5-whole-board-unwired\" data-image-description=\"\" data-image-caption=\"\" data-large-file=\"https:\/\/i0.wp.com\/pugix.com\/synth\/wp-content\/uploads\/2015\/01\/rollz-5-whole-board-unwired.jpg?fit=1000%2C790&amp;ssl=1\" class=\"aligncenter size-medium wp-image-1336\" src=\"https:\/\/i0.wp.com\/pugix.com\/synth\/wp-content\/uploads\/2015\/01\/rollz-5-whole-board-unwired.jpg?resize=500%2C395&#038;ssl=1\" alt=\"rollz-5-whole-board-unwired\" width=\"500\" height=\"395\" srcset=\"https:\/\/i0.wp.com\/pugix.com\/synth\/wp-content\/uploads\/2015\/01\/rollz-5-whole-board-unwired.jpg?resize=500%2C395&amp;ssl=1 500w, https:\/\/i0.wp.com\/pugix.com\/synth\/wp-content\/uploads\/2015\/01\/rollz-5-whole-board-unwired.jpg?w=1000&amp;ssl=1 1000w\" sizes=\"auto, (max-width: 500px) 100vw, 500px\" \/><\/a>Above is a pic of the mostly assembled PC board.&nbsp; Chips not inserted yet.&nbsp; If you look closely (click the image) you can see that the traces from the 12 outputs to the internal mixing buss have been cut.&nbsp; The black\/red wire to the right goes to a connector that brings in regulated 9V power.&nbsp; Power starvation feature is unused. Here are more details of each section.<\/p>\n<p><a href=\"https:\/\/i0.wp.com\/pugix.com\/synth\/wp-content\/uploads\/2015\/01\/rollz-5-rollz-detail.jpg?ssl=1\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" data-attachment-id=\"1334\" data-permalink=\"https:\/\/pugix.com\/synth\/rollz-5-assembly-progress\/rollz-5-rollz-detail\/\" data-orig-file=\"https:\/\/i0.wp.com\/pugix.com\/synth\/wp-content\/uploads\/2015\/01\/rollz-5-rollz-detail.jpg?fit=1000%2C368&amp;ssl=1\" data-orig-size=\"1000,368\" data-comments-opened=\"1\" data-image-meta=\"{&quot;aperture&quot;:&quot;0&quot;,&quot;credit&quot;:&quot;&quot;,&quot;camera&quot;:&quot;&quot;,&quot;caption&quot;:&quot;&quot;,&quot;created_timestamp&quot;:&quot;0&quot;,&quot;copyright&quot;:&quot;&quot;,&quot;focal_length&quot;:&quot;0&quot;,&quot;iso&quot;:&quot;0&quot;,&quot;shutter_speed&quot;:&quot;0&quot;,&quot;title&quot;:&quot;&quot;,&quot;orientation&quot;:&quot;0&quot;}\" data-image-title=\"rollz-5-rollz-detail\" data-image-description=\"\" data-image-caption=\"\" data-large-file=\"https:\/\/i0.wp.com\/pugix.com\/synth\/wp-content\/uploads\/2015\/01\/rollz-5-rollz-detail.jpg?fit=1000%2C368&amp;ssl=1\" class=\"aligncenter size-medium wp-image-1334\" src=\"https:\/\/i0.wp.com\/pugix.com\/synth\/wp-content\/uploads\/2015\/01\/rollz-5-rollz-detail.jpg?resize=500%2C184&#038;ssl=1\" alt=\"rollz-5-rollz-detail\" width=\"500\" height=\"184\" srcset=\"https:\/\/i0.wp.com\/pugix.com\/synth\/wp-content\/uploads\/2015\/01\/rollz-5-rollz-detail.jpg?resize=500%2C184&amp;ssl=1 500w, https:\/\/i0.wp.com\/pugix.com\/synth\/wp-content\/uploads\/2015\/01\/rollz-5-rollz-detail.jpg?w=1000&amp;ssl=1 1000w\" sizes=\"auto, (max-width: 500px) 100vw, 500px\" \/><\/a>Shows six of the eight 2-Rollz oscillators.&nbsp; Jumper wires shorten the nodes to be only two, since I only care about simple LFOs with two nodes each.&nbsp; Capacitors range from 0.33 uf through 4.7 uf to get the rates I wanted.&nbsp; These are faster than the Rollzer from Ciat-Lonbarde.&nbsp; External LED drivers will be mounted behind the panel.&nbsp; I also provide a positive going output, like on the Plumbutter Rollz.<\/p>\n<p><a href=\"https:\/\/i0.wp.com\/pugix.com\/synth\/wp-content\/uploads\/2015\/01\/rollz-5-avdog-detail.jpg?ssl=1\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" data-attachment-id=\"1330\" data-permalink=\"https:\/\/pugix.com\/synth\/rollz-5-assembly-progress\/rollz-5-avdog-detail\/\" data-orig-file=\"https:\/\/i0.wp.com\/pugix.com\/synth\/wp-content\/uploads\/2015\/01\/rollz-5-avdog-detail.jpg?fit=1000%2C802&amp;ssl=1\" data-orig-size=\"1000,802\" data-comments-opened=\"1\" data-image-meta=\"{&quot;aperture&quot;:&quot;0&quot;,&quot;credit&quot;:&quot;&quot;,&quot;camera&quot;:&quot;&quot;,&quot;caption&quot;:&quot;&quot;,&quot;created_timestamp&quot;:&quot;0&quot;,&quot;copyright&quot;:&quot;&quot;,&quot;focal_length&quot;:&quot;0&quot;,&quot;iso&quot;:&quot;0&quot;,&quot;shutter_speed&quot;:&quot;0&quot;,&quot;title&quot;:&quot;&quot;,&quot;orientation&quot;:&quot;0&quot;}\" data-image-title=\"rollz-5-avdog-detail\" data-image-description=\"\" data-image-caption=\"\" data-large-file=\"https:\/\/i0.wp.com\/pugix.com\/synth\/wp-content\/uploads\/2015\/01\/rollz-5-avdog-detail.jpg?fit=1000%2C802&amp;ssl=1\" class=\"aligncenter size-medium wp-image-1330\" src=\"https:\/\/i0.wp.com\/pugix.com\/synth\/wp-content\/uploads\/2015\/01\/rollz-5-avdog-detail.jpg?resize=500%2C401&#038;ssl=1\" alt=\"rollz-5-avdog-detail\" width=\"500\" height=\"401\" srcset=\"https:\/\/i0.wp.com\/pugix.com\/synth\/wp-content\/uploads\/2015\/01\/rollz-5-avdog-detail.jpg?resize=500%2C401&amp;ssl=1 500w, https:\/\/i0.wp.com\/pugix.com\/synth\/wp-content\/uploads\/2015\/01\/rollz-5-avdog-detail.jpg?w=1000&amp;ssl=1 1000w\" sizes=\"auto, (max-width: 500px) 100vw, 500px\" \/><\/a>Here is one of the four AVDog circuits.&nbsp; The &#8216;x&#8217; resistors will be wired to the rate pot on the panel.&nbsp; The 4k7 resistor seems missing, but isn&#8217;t.&nbsp; I couldn&#8217;t get 1\/8 watt 4k7 resistors, so 1\/4 watt resistors are soldered on the back, because the leads are too big to fit the holes in the PC board.&nbsp; A 100K is missing, because that is where the input to the VCA will be switched in.<\/p>\n<p><a href=\"https:\/\/i0.wp.com\/pugix.com\/synth\/wp-content\/uploads\/2015\/01\/rollz-5-ultrasound-detail.jpg?ssl=1\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" data-attachment-id=\"1335\" data-permalink=\"https:\/\/pugix.com\/synth\/rollz-5-assembly-progress\/rollz-5-ultrasound-detail\/\" data-orig-file=\"https:\/\/i0.wp.com\/pugix.com\/synth\/wp-content\/uploads\/2015\/01\/rollz-5-ultrasound-detail.jpg?fit=1000%2C750&amp;ssl=1\" data-orig-size=\"1000,750\" data-comments-opened=\"1\" data-image-meta=\"{&quot;aperture&quot;:&quot;0&quot;,&quot;credit&quot;:&quot;&quot;,&quot;camera&quot;:&quot;&quot;,&quot;caption&quot;:&quot;&quot;,&quot;created_timestamp&quot;:&quot;0&quot;,&quot;copyright&quot;:&quot;&quot;,&quot;focal_length&quot;:&quot;0&quot;,&quot;iso&quot;:&quot;0&quot;,&quot;shutter_speed&quot;:&quot;0&quot;,&quot;title&quot;:&quot;&quot;,&quot;orientation&quot;:&quot;0&quot;}\" data-image-title=\"rollz-5-ultrasound-detail\" data-image-description=\"\" data-image-caption=\"\" data-large-file=\"https:\/\/i0.wp.com\/pugix.com\/synth\/wp-content\/uploads\/2015\/01\/rollz-5-ultrasound-detail.jpg?fit=1000%2C750&amp;ssl=1\" class=\"aligncenter size-medium wp-image-1335\" src=\"https:\/\/i0.wp.com\/pugix.com\/synth\/wp-content\/uploads\/2015\/01\/rollz-5-ultrasound-detail.jpg?resize=500%2C375&#038;ssl=1\" alt=\"rollz-5-ultrasound-detail\" width=\"500\" height=\"375\" srcset=\"https:\/\/i0.wp.com\/pugix.com\/synth\/wp-content\/uploads\/2015\/01\/rollz-5-ultrasound-detail.jpg?resize=500%2C375&amp;ssl=1 500w, https:\/\/i0.wp.com\/pugix.com\/synth\/wp-content\/uploads\/2015\/01\/rollz-5-ultrasound-detail.jpg?w=1000&amp;ssl=1 1000w\" sizes=\"auto, (max-width: 500px) 100vw, 500px\" \/><\/a>Above is the Ultrasound detail.&nbsp; Two circuits share one 4066 CMOS chip.<\/p>\n<p><a href=\"https:\/\/i0.wp.com\/pugix.com\/synth\/wp-content\/uploads\/2015\/01\/rollz-5-gong-detail.jpg?ssl=1\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" data-attachment-id=\"1331\" data-permalink=\"https:\/\/pugix.com\/synth\/rollz-5-assembly-progress\/rollz-5-gong-detail\/\" data-orig-file=\"https:\/\/i0.wp.com\/pugix.com\/synth\/wp-content\/uploads\/2015\/01\/rollz-5-gong-detail.jpg?fit=1000%2C447&amp;ssl=1\" data-orig-size=\"1000,447\" data-comments-opened=\"1\" data-image-meta=\"{&quot;aperture&quot;:&quot;0&quot;,&quot;credit&quot;:&quot;&quot;,&quot;camera&quot;:&quot;&quot;,&quot;caption&quot;:&quot;&quot;,&quot;created_timestamp&quot;:&quot;0&quot;,&quot;copyright&quot;:&quot;&quot;,&quot;focal_length&quot;:&quot;0&quot;,&quot;iso&quot;:&quot;0&quot;,&quot;shutter_speed&quot;:&quot;0&quot;,&quot;title&quot;:&quot;&quot;,&quot;orientation&quot;:&quot;0&quot;}\" data-image-title=\"rollz-5-gong-detail\" data-image-description=\"\" data-image-caption=\"\" data-large-file=\"https:\/\/i0.wp.com\/pugix.com\/synth\/wp-content\/uploads\/2015\/01\/rollz-5-gong-detail.jpg?fit=1000%2C447&amp;ssl=1\" class=\"aligncenter size-medium wp-image-1331\" src=\"https:\/\/i0.wp.com\/pugix.com\/synth\/wp-content\/uploads\/2015\/01\/rollz-5-gong-detail.jpg?resize=500%2C224&#038;ssl=1\" alt=\"rollz-5-gong-detail\" width=\"500\" height=\"224\" srcset=\"https:\/\/i0.wp.com\/pugix.com\/synth\/wp-content\/uploads\/2015\/01\/rollz-5-gong-detail.jpg?resize=500%2C224&amp;ssl=1 500w, https:\/\/i0.wp.com\/pugix.com\/synth\/wp-content\/uploads\/2015\/01\/rollz-5-gong-detail.jpg?w=1000&amp;ssl=1 1000w\" sizes=\"auto, (max-width: 500px) 100vw, 500px\" \/><\/a>Above is the Gong detail.&nbsp; Two circuits here share a 4013 CMOS chip.&nbsp; Trimpots will be replaced by panel pots for adjusting the filter frequency.&nbsp; The aux input to the filter will mix with the pulse, just like the aux input to Gong on Plumbutter.<\/p>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>The Meng Qi Rollz-5 PC board project in mid-assembly stage. The image above shows the PC board mounted behind a clear plexiglass panel that holds pots, jacks, switches, etc., sitting &#8230; <a class=\"styledbutton\" href=\"https:\/\/pugix.com\/synth\/rollz-5-assembly-progress\/\">Read More<\/a><\/p>\n","protected":false},"author":1,"featured_media":1333,"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":[122,71,126,141],"class_list":["post-1329","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-projects","tag-ciat-lonbarde","tag-diy","tag-plumbutter","tag-rollz-5"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.6 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Rollz-5 Assembly Progress - 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\/rollz-5-assembly-progress\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Rollz-5 Assembly Progress - Richard Brewster&#039;s Electronic Sounds\" \/>\n<meta property=\"og:description\" content=\"The Meng Qi Rollz-5 PC board project in mid-assembly stage. 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