{"id":331,"date":"2013-04-01T13:13:30","date_gmt":"2013-04-01T12:13:30","guid":{"rendered":"http:\/\/www.daqq.eu\/?p=331"},"modified":"2013-04-01T13:13:30","modified_gmt":"2013-04-01T12:13:30","slug":"magic-eye","status":"publish","type":"post","link":"https:\/\/www.daqq.eu\/?p=331","title":{"rendered":"Magic eye"},"content":{"rendered":"<p>I recently acquired an old EM80 magic eye tube. It seemed cool just to play around with it and maybe even make a nice sound level indicator - the thing it was made to do.The filament was OK, so I made a nice little bit of electronics around it.<\/p>\n<p>The high voltage (250V) is generated by a voltage doubler and a transformer used backwards.<\/p>\n<p>Here's the schematic (click for better resolution):<\/p>\n<p><a href=\"http:\/\/www.daqq.eu\/wp-content\/uploads\/2013\/03\/magic_eye_schematic.gif\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-4\" alt=\"magic_eye_schematic\" src=\"http:\/\/www.daqq.eu\/wp-content\/uploads\/2013\/03\/magic_eye_schematic.gif\" width=\"651\" height=\"414\" \/><\/a><\/p>\n<p>&nbsp;<\/p>\n<h2>Pictures of the eye in action:<\/h2>\n<p>Darkness (long exposure):<\/p>\n<p><a href=\"http:\/\/www.daqq.eu\/wp-content\/uploads\/2013\/04\/magic_eye_darkness.png\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-333\" alt=\"magic_eye_darkness\" src=\"http:\/\/www.daqq.eu\/wp-content\/uploads\/2013\/04\/magic_eye_darkness.png\" width=\"400\" height=\"553\" srcset=\"https:\/\/www.daqq.eu\/wp-content\/uploads\/2013\/04\/magic_eye_darkness.png 400w, https:\/\/www.daqq.eu\/wp-content\/uploads\/2013\/04\/magic_eye_darkness-216x300.png 216w\" sizes=\"auto, (max-width: 400px) 100vw, 400px\" \/><\/a><\/p>\n<p>&nbsp;<\/p>\n<p>Daylight:<\/p>\n<p><a href=\"http:\/\/www.daqq.eu\/wp-content\/uploads\/2013\/04\/magic_eye_complete.png\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-332\" alt=\"magic_eye_complete\" src=\"http:\/\/www.daqq.eu\/wp-content\/uploads\/2013\/04\/magic_eye_complete.png\" width=\"400\" height=\"465\" srcset=\"https:\/\/www.daqq.eu\/wp-content\/uploads\/2013\/04\/magic_eye_complete.png 400w, https:\/\/www.daqq.eu\/wp-content\/uploads\/2013\/04\/magic_eye_complete-258x300.png 258w\" sizes=\"auto, (max-width: 400px) 100vw, 400px\" \/><\/a><\/p>\n<p>And here's what's inside of it:<\/p>\n<p><a href=\"http:\/\/www.daqq.eu\/wp-content\/uploads\/2013\/04\/magic_eye_inside.png\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-334\" alt=\"magic_eye_inside\" src=\"http:\/\/www.daqq.eu\/wp-content\/uploads\/2013\/04\/magic_eye_inside.png\" width=\"600\" height=\"370\" srcset=\"https:\/\/www.daqq.eu\/wp-content\/uploads\/2013\/04\/magic_eye_inside.png 600w, https:\/\/www.daqq.eu\/wp-content\/uploads\/2013\/04\/magic_eye_inside-300x185.png 300w\" sizes=\"auto, (max-width: 600px) 100vw, 600px\" \/><\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>I recently acquired an old EM80 magic eye tube. It seemed cool just to play around with it and maybe even make a nice sound level indicator - the thing it was made to do.The filament was OK, so I &hellip; <a href=\"https:\/\/www.daqq.eu\/?p=331\">Continue reading <span class=\"meta-nav\">&rarr;<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[22,8],"tags":[23,11],"class_list":["post-331","post","type-post","status-publish","format-standard","hentry","category-prj_other","category-projects","tag-tube","tag-vintage-2"],"_links":{"self":[{"href":"https:\/\/www.daqq.eu\/index.php?rest_route=\/wp\/v2\/posts\/331","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.daqq.eu\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.daqq.eu\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.daqq.eu\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.daqq.eu\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=331"}],"version-history":[{"count":1,"href":"https:\/\/www.daqq.eu\/index.php?rest_route=\/wp\/v2\/posts\/331\/revisions"}],"predecessor-version":[{"id":335,"href":"https:\/\/www.daqq.eu\/index.php?rest_route=\/wp\/v2\/posts\/331\/revisions\/335"}],"wp:attachment":[{"href":"https:\/\/www.daqq.eu\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=331"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.daqq.eu\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=331"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.daqq.eu\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=331"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}