{"id":278762,"date":"2016-09-15T02:00:00","date_gmt":"2016-09-14T23:00:00","guid":{"rendered":"http:\/\/www.fyysika.ee\/?guid=e6976643a088c2e38d65a0d48a492c02"},"modified":"2016-09-15T02:00:00","modified_gmt":"2016-09-14T23:00:00","slug":"diy-soundcard-based-temperature-logging-system-part-i-design","status":"publish","type":"post","link":"https:\/\/www.fyysika.ee\/?p=278762","title":{"rendered":"DIY soundcard based temperature logging system. Part I: design"},"content":{"rendered":"<p>This paper aims to enable schools to make their own low-cost temperature logging instrument and to<br \/>\nlearn a something about its calibration in the process. This paper describes how a thermistor can be<br \/>\nintegrated into a simple potential divider circuit which is powered with the sound output of a<br \/>\ncomputer and monitored by the microphone input. The voltage across a fixed resistor is recorded and<br \/>\nscaled to convert it into a temperature reading in the range 0\u2013100 \u00b0C. The calibration process is<br \/>\ndescribed with reference to fixed points and the effects of non-linearity are highlighted. An<br \/>\noptimised calibration procedure is described which enables sub degree resolution and a software<br \/>\nprogram was written which makes it possible to log, display and save temperature changes over a user<br \/>\ndetermined period of time.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>This paper aims to enable schools to make their own low-cost temperature logging instrument and to<br \/>\nlearn a something about its calibration in the process. This paper describes how a thermistor can be<br \/>\nintegrated into a simple potential divider circuit&#8230;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_genesis_hide_title":false,"_genesis_hide_breadcrumbs":false,"_genesis_hide_singular_image":false,"_genesis_hide_footer_widgets":false,"_genesis_custom_body_class":"","_genesis_custom_post_class":"","_genesis_layout":"","footnotes":""},"categories":[178],"tags":[],"class_list":{"0":"post-278762","1":"post","2":"type-post","3":"status-publish","4":"format-standard","6":"category-rss-fuusikaharidus","7":"entry"},"_links":{"self":[{"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=\/wp\/v2\/posts\/278762","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=278762"}],"version-history":[{"count":0,"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=\/wp\/v2\/posts\/278762\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=278762"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=278762"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=278762"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}