{"id":122,"date":"2011-06-06T19:17:33","date_gmt":"2011-06-07T02:17:33","guid":{"rendered":"http:\/\/tubetime.us\/?p=122"},"modified":"2011-06-06T19:17:33","modified_gmt":"2011-06-07T02:17:33","slug":"lissajous-figures","status":"publish","type":"post","link":"https:\/\/www.tubetime.us\/?p=122","title":{"rendered":"Lissajous Figures"},"content":{"rendered":"<p>My new CRT driver board is coming along rather nicely. Tonight I tested it out with a 5&#8243; CRT. It uses a P7 radar phosphor so it looks bluish white with a sickly yellow persistence.<\/p>\n<p><a title=\"5&quot; Cathode Ray Tube - Lissajous Figure by eschlaep, on Flickr\" href=\"http:\/\/www.flickr.com\/photos\/tubetime\/5806382691\/\"><img loading=\"lazy\" decoding=\"async\" src=\"http:\/\/farm6.static.flickr.com\/5261\/5806382691_34263a1139.jpg\" alt=\"5&quot; Cathode Ray Tube - Lissajous Figure\" width=\"500\" height=\"375\" \/><\/a><\/p>\n<p>The pattern is a Lissajous figure (LISS-uh-joo). Take two waveform generators and connect one to the X input and the other to the Y input, and you get all sorts of interesting patterns. Since the CRT driver board is not available as a kit (not yet, anyway!) you can duplicate this with an oscilloscope and two function generators.<\/p>\n<p>There&#8217;s some interesting math behind Lissajous figures, but I&#8217;m more interested in building 3KV power supplies.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>My new CRT driver board is coming along rather nicely. Tonight I tested it out with a 5&#8243; CRT. It uses a P7 radar phosphor so it looks bluish white with a sickly yellow persistence. The pattern is a Lissajous figure (LISS-uh-joo). Take two waveform generators and connect one to the X input and the [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[5],"tags":[],"class_list":["post-122","post","type-post","status-publish","format-standard","hentry","category-projects"],"_links":{"self":[{"href":"https:\/\/www.tubetime.us\/index.php?rest_route=\/wp\/v2\/posts\/122","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.tubetime.us\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.tubetime.us\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.tubetime.us\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.tubetime.us\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=122"}],"version-history":[{"count":1,"href":"https:\/\/www.tubetime.us\/index.php?rest_route=\/wp\/v2\/posts\/122\/revisions"}],"predecessor-version":[{"id":123,"href":"https:\/\/www.tubetime.us\/index.php?rest_route=\/wp\/v2\/posts\/122\/revisions\/123"}],"wp:attachment":[{"href":"https:\/\/www.tubetime.us\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=122"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.tubetime.us\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=122"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.tubetime.us\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=122"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}