{"id":259,"date":"2011-12-01T18:33:27","date_gmt":"2011-12-02T01:33:27","guid":{"rendered":"http:\/\/zethus.ca\/wp\/?p=259"},"modified":"2018-10-20T21:47:45","modified_gmt":"2018-10-21T04:47:45","slug":"water-level-cap-sense","status":"publish","type":"post","link":"http:\/\/zethus.ca\/wp\/?p=259","title":{"rendered":"Water Level Cap Sense"},"content":{"rendered":"<p><a href=\"http:\/\/zethus.ca\/wp\/wp-content\/uploads\/2011\/12\/IMG_0148.jpg\"><img loading=\"lazy\" class=\"alignleft size-medium wp-image-260\" title=\"Cap Sense\" src=\"http:\/\/zethus.ca\/wp\/wp-content\/uploads\/2011\/12\/IMG_0148-300x225.jpg\" alt=\"\" width=\"300\" height=\"225\" srcset=\"http:\/\/zethus.ca\/wp\/wp-content\/uploads\/2011\/12\/IMG_0148-300x225.jpg 300w, http:\/\/zethus.ca\/wp\/wp-content\/uploads\/2011\/12\/IMG_0148-1024x768.jpg 1024w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><\/a> This Thursday&#8217;s electronics night, we worked on the capacitive water level sensor. We wrapped a strip of <a href=\"http:\/\/search.digikey.com\/us\/en\/products\/1125%20X%201%22\/3M1125C-ND\/1630161\">adhesive copper foil<\/a> around the water tank of the <a href=\"http:\/\/www.rancilio.it\/rancilio\/prod_model.jsp?id_model=49&amp;id_language=3&amp;id_category=26\">silvia<\/a>. \u00a0We then tried using a method similar to the <a href=\"http:\/\/www.arduino.cc\/playground\/Main\/CapSense\">arduino capsense library<\/a> to get readings from the tank. \u00a0It worked not to badly the first time out. \u00a0This now needs to be refined to use a hardware counter to get the readings, and also need to take readings 8.33 ms apart to account for the 60Hz hum that these things tend to pick up. (i.e. 180 degrees out of phase)<\/p>\n","protected":false},"excerpt":{"rendered":"<p>This Thursday&#8217;s electronics night, we worked on the capacitive water level sensor. We wrapped a strip of adhesive copper foil around the water tank of the silvia. \u00a0We then tried using a method similar to the arduino capsense library to &hellip; <a href=\"http:\/\/zethus.ca\/wp\/?p=259\">Continue reading <span class=\"meta-nav\">&rarr;<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":[],"categories":[5,13],"tags":[],"jetpack_featured_media_url":"","_links":{"self":[{"href":"http:\/\/zethus.ca\/wp\/index.php?rest_route=\/wp\/v2\/posts\/259"}],"collection":[{"href":"http:\/\/zethus.ca\/wp\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/zethus.ca\/wp\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/zethus.ca\/wp\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/zethus.ca\/wp\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=259"}],"version-history":[{"count":4,"href":"http:\/\/zethus.ca\/wp\/index.php?rest_route=\/wp\/v2\/posts\/259\/revisions"}],"predecessor-version":[{"id":766,"href":"http:\/\/zethus.ca\/wp\/index.php?rest_route=\/wp\/v2\/posts\/259\/revisions\/766"}],"wp:attachment":[{"href":"http:\/\/zethus.ca\/wp\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=259"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/zethus.ca\/wp\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=259"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/zethus.ca\/wp\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=259"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}