{"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:\/\/tubetime.us\/index.php\/2011\/06\/06\/lissajous-figures\/","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\" 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":4,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"jetpack_post_was_ever_published":false,"jetpack_publicize_message":"","jetpack_is_tweetstorm":false,"jetpack_publicize_feature_enabled":true},"categories":[5],"tags":[],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"jetpack_shortlink":"https:\/\/wp.me\/p80Z1r-1Y","_links":{"self":[{"href":"https:\/\/tubetime.us\/index.php\/wp-json\/wp\/v2\/posts\/122"}],"collection":[{"href":"https:\/\/tubetime.us\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/tubetime.us\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/tubetime.us\/index.php\/wp-json\/wp\/v2\/users\/4"}],"replies":[{"embeddable":true,"href":"https:\/\/tubetime.us\/index.php\/wp-json\/wp\/v2\/comments?post=122"}],"version-history":[{"count":0,"href":"https:\/\/tubetime.us\/index.php\/wp-json\/wp\/v2\/posts\/122\/revisions"}],"wp:attachment":[{"href":"https:\/\/tubetime.us\/index.php\/wp-json\/wp\/v2\/media?parent=122"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/tubetime.us\/index.php\/wp-json\/wp\/v2\/categories?post=122"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/tubetime.us\/index.php\/wp-json\/wp\/v2\/tags?post=122"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}