{"id":99,"date":"2016-01-24T19:22:02","date_gmt":"2016-01-24T19:22:02","guid":{"rendered":"https:\/\/geekblog.febo.com\/wp\/?p=99"},"modified":"2016-01-29T20:19:58","modified_gmt":"2016-01-29T20:19:58","slug":"tass-system-enclosure","status":"publish","type":"post","link":"https:\/\/blog.febo.com\/?p=99","title":{"rendered":"TASS System enclosure"},"content":{"rendered":"<p>Several of the design projects I&#8217;ve done for TAPR were part of a larger concept I&#8217;ve been working on for several years: a measurement system that will allow me to compare the pulse-per-second (PPS) outputs from a bunch of test devices against one of several reference clocks over long time periods (sometimes a year or more).  A key part of that system is a &#8220;multiplexer&#8221; or switch matrix that allows selecting one of several devices under test (DUT) and reference sources.  My <A HREF=\"http:\/\/tapr.org\/kits_tass.html\">TASS computer controlled switch<\/A> is at the core of the multiplexer.<\/p>\n<p>Here are photos showing front, back, and overhead views (click on the images for larger versions).  The box contains 4 TASS switches, an Arduino mega2560 processor, and an 8&#215;8 matrix LED to display switch status.  The switches are configured to allow any one of 16 DUTs to be selected along with any one of 8 references, with the outputs being routed to any one of four time interval counters. The 2U rack enclosure was fabricated from my design by <A HREF=\"http:\/\/frontpanelexpress.com\">Front Panel Express<\/A>.<\/p>\n<p><a href=\"http:\/\/blog.febo.com\/wp-content\/uploads\/2016\/01\/tass_system_front_2_1600px.jpg\" data-rel=\"penci-gallery-image-content\" ><img decoding=\"async\" src=\"http:\/\/blog.febo.com\/wp-content\/uploads\/2016\/01\/tass_system_front_2_1600px-300x136.jpg\" alt=\"tass_system_front_2_1600px\" width=\"300\" height=\"136\" class=\"alignnone size-medium wp-image-107\" srcset=\"https:\/\/blog.febo.com\/wp-content\/uploads\/2016\/01\/tass_system_front_2_1600px-300x136.jpg 300w, https:\/\/blog.febo.com\/wp-content\/uploads\/2016\/01\/tass_system_front_2_1600px-1024x463.jpg 1024w, https:\/\/blog.febo.com\/wp-content\/uploads\/2016\/01\/tass_system_front_2_1600px.jpg 1600w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><\/a><\/p>\n<p><a href=\"http:\/\/blog.febo.com\/wp-content\/uploads\/2016\/01\/tass_system_rear_2_1600px.jpg\" data-rel=\"penci-gallery-image-content\" ><img decoding=\"async\" src=\"http:\/\/blog.febo.com\/wp-content\/uploads\/2016\/01\/tass_system_rear_2_1600px-300x136.jpg\" alt=\"tass_system_rear_2_1600px\" width=\"300\" height=\"136\" class=\"alignnone size-medium wp-image-106\" srcset=\"https:\/\/blog.febo.com\/wp-content\/uploads\/2016\/01\/tass_system_rear_2_1600px-300x136.jpg 300w, https:\/\/blog.febo.com\/wp-content\/uploads\/2016\/01\/tass_system_rear_2_1600px-1024x463.jpg 1024w, https:\/\/blog.febo.com\/wp-content\/uploads\/2016\/01\/tass_system_rear_2_1600px.jpg 1600w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><\/a><\/p>\n<p><a href=\"http:\/\/blog.febo.com\/wp-content\/uploads\/2016\/01\/tass_system_top_2_1600px.jpg\" data-rel=\"penci-gallery-image-content\" ><img decoding=\"async\" src=\"http:\/\/blog.febo.com\/wp-content\/uploads\/2016\/01\/tass_system_top_2_1600px-300x195.jpg\" alt=\"tass_system_top_2_1600px\" width=\"300\" height=\"195\" class=\"alignnone size-medium wp-image-105\" srcset=\"https:\/\/blog.febo.com\/wp-content\/uploads\/2016\/01\/tass_system_top_2_1600px-300x195.jpg 300w, https:\/\/blog.febo.com\/wp-content\/uploads\/2016\/01\/tass_system_top_2_1600px-1024x666.jpg 1024w, https:\/\/blog.febo.com\/wp-content\/uploads\/2016\/01\/tass_system_top_2_1600px.jpg 1600w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Several of the design projects I&#8217;ve done for TAPR were part of a larger concept I&#8217;ve been working on for several years: a measurement system that will allow me to&hellip;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"image","meta":{"_lmt_disableupdate":"","_lmt_disable":"","ngg_post_thumbnail":0,"footnotes":""},"categories":[5,7,2],"tags":[],"class_list":["post-99","post","type-post","status-publish","format-image","hentry","category-tapr-projects","category-test-and-lab-equipment","category-time-and-frequency","post_format-post-format-image"],"_links":{"self":[{"href":"https:\/\/blog.febo.com\/index.php?rest_route=\/wp\/v2\/posts\/99","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/blog.febo.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blog.febo.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blog.febo.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/blog.febo.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=99"}],"version-history":[{"count":5,"href":"https:\/\/blog.febo.com\/index.php?rest_route=\/wp\/v2\/posts\/99\/revisions"}],"predecessor-version":[{"id":110,"href":"https:\/\/blog.febo.com\/index.php?rest_route=\/wp\/v2\/posts\/99\/revisions\/110"}],"wp:attachment":[{"href":"https:\/\/blog.febo.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=99"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blog.febo.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=99"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blog.febo.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=99"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}