{"id":321,"date":"2014-01-21T17:09:00","date_gmt":"2014-01-21T17:09:00","guid":{"rendered":"http:\/\/fabriquilla25.com\/?p=321"},"modified":"2015-04-29T19:04:57","modified_gmt":"2015-04-29T19:04:57","slug":"gypsum-block-for-soil-moisture-sensor","status":"publish","type":"post","link":"http:\/\/fabriquilla25.com\/?p=321","title":{"rendered":"Gypsum block for Soil Moisture Sensor"},"content":{"rendered":"

Based on the previous experiences of Reinier Van der Lee related in his blog http:\/\/vanderleevineyard.com<\/a> I have made my own version of the gypsum block.<\/p>\n

I made my firsts blocks in a very similar way that Reinier made before, but I started to think how to improve them, not really improve, because Reinier’s blocks works perfect, but I wanted to made them in an easier and methodic way.<\/p>\n

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So, this is the way my gypsum blocks are made:<\/p>\n

I have found a very cheap and easy to find matrix: Hair Curlers<\/p>\n

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Once you take off the “skin” you get a nice matrix for the gypsum block:<\/p>\n

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These curlers have approx 35mm of diameter. To complete the structure of the block I have designed and printed two pieces (can be found here<\/a>) in openScad that fits into the curler:<\/p>\n

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The final step is to cut 2 pieces of 7cm. stainless steel m3 threaded rod (all the metal pieces are stainless steel quality) and put all together as can be seen in the first photo.<\/p>\n

To fill the matrix I cover the matrix with plastic film (the cooking one) and I pour the 50% plaster of paris 50% water (in volume) mix inside. This gypsum solidificates very quick and depending on temperature you can manipulate it in a couple of minutes.<\/p>\n

Finally just attach two cables and use it with the Reinier’s sketch or similar.<\/p>\n","protected":false},"excerpt":{"rendered":"

Based on the previous experiences of Reinier Van der Lee related in his blog http:\/\/vanderleevineyard.com I have made my own version of the gypsum block. I made my firsts blocks in a very similar way that Reinier made before, but I started to think how to improve them, not really improve, because Reinier’s blocks works perfect, but […]<\/p>\n","protected":false},"author":1,"featured_media":351,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[1,2],"tags":[],"_links":{"self":[{"href":"http:\/\/fabriquilla25.com\/index.php?rest_route=\/wp\/v2\/posts\/321"}],"collection":[{"href":"http:\/\/fabriquilla25.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/fabriquilla25.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/fabriquilla25.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/fabriquilla25.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=321"}],"version-history":[{"count":1,"href":"http:\/\/fabriquilla25.com\/index.php?rest_route=\/wp\/v2\/posts\/321\/revisions"}],"predecessor-version":[{"id":416,"href":"http:\/\/fabriquilla25.com\/index.php?rest_route=\/wp\/v2\/posts\/321\/revisions\/416"}],"wp:featuredmedia":[{"embeddable":true,"href":"http:\/\/fabriquilla25.com\/index.php?rest_route=\/wp\/v2\/media\/351"}],"wp:attachment":[{"href":"http:\/\/fabriquilla25.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=321"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/fabriquilla25.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=321"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/fabriquilla25.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=321"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}