{"id":455,"date":"2007-09-09T11:32:34","date_gmt":"2007-09-09T10:32:34","guid":{"rendered":"http:\/\/www.evertdekker.com\/wp\/?p=455"},"modified":"2023-01-08T20:37:55","modified_gmt":"2023-01-08T19:37:55","slug":"dinner-table-dimmer","status":"publish","type":"post","link":"https:\/\/evertdekker.com\/wp\/?p=455","title":{"rendered":"Dinner table dimmer"},"content":{"rendered":"<hr \/>\n<p>&nbsp;<\/p>\n<p>This was the first device made for the <a href=\"http:\/\/www.evertdekker.com\/wp\/?cat=18\">Joshua bus<\/a> .<br \/>\nDouble side pcb is home made and designed with the good old Ultiboard.<br \/>\nI decided not to make de dimmer compleet in software, then you need interrupt driven zero crossing detection and a timer for the triac output.The disadvance of the software dimmer is that the cpu has not much time left to do something else. For example if you receiving a message over the Rs-485 then this will trigger the RX interrupt and the light will flash due the missing zero cross interrupts. Instead i&#8217;m using a analog dimmer with a 1wire potmeter.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/evertdekker.com\/wp\/wp-content\/uploads\/2023\/01\/dimmereettafel.jpg\" alt=\"\" width=\"500\" height=\"272\" \/><\/p>\n<p><a href=\"http:\/\/evertdekker.com\/Joomla\/images\/stories\/projects\/Dimmereettafel\/Eettafel%20controller.pdf\">Schematic<\/a><\/p>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>&nbsp; This was the first device made for the Joshua bus . Double side pcb is home made and designed with the good old Ultiboard. I decided not to make de dimmer compleet in software, then you need interrupt driven zero crossing detection and a timer for the triac output.The disadvance of the software dimmer [&#8230;]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[18],"tags":[],"class_list":["post-455","post","type-post","status-publish","format-standard","hentry","category-joshua"],"_links":{"self":[{"href":"https:\/\/evertdekker.com\/wp\/index.php?rest_route=\/wp\/v2\/posts\/455","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/evertdekker.com\/wp\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/evertdekker.com\/wp\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/evertdekker.com\/wp\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/evertdekker.com\/wp\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=455"}],"version-history":[{"count":2,"href":"https:\/\/evertdekker.com\/wp\/index.php?rest_route=\/wp\/v2\/posts\/455\/revisions"}],"predecessor-version":[{"id":1891,"href":"https:\/\/evertdekker.com\/wp\/index.php?rest_route=\/wp\/v2\/posts\/455\/revisions\/1891"}],"wp:attachment":[{"href":"https:\/\/evertdekker.com\/wp\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=455"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/evertdekker.com\/wp\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=455"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/evertdekker.com\/wp\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=455"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}