{"id":11562,"date":"2016-07-22T21:28:48","date_gmt":"2016-07-23T01:28:48","guid":{"rendered":"http:\/\/embedded-lab.com\/blog\/?p=11562"},"modified":"2016-07-22T21:28:48","modified_gmt":"2016-07-23T01:28:48","slug":"diy-spectrophotometer","status":"publish","type":"post","link":"https:\/\/embedded-lab.com\/blog\/diy-spectrophotometer\/","title":{"rendered":"DIY Spectrophotometer"},"content":{"rendered":"<p>Spectrophotometers are used in scientific studies to quantitatively measure the absorption spectra of a sample object by passing a beam of light through\u00a0it. [<strong>doctek<\/strong>] is a contestant for <strong>Hackaday Prize 2016<\/strong>\u00a0and his entry for the contest is a <strong><a href=\"https:\/\/hackaday.io\/project\/12491-spectrophotometer\" target=\"_blank\">DIY Spectrophotometer<\/a><\/strong> using Teensy.<\/p>\n<div id=\"attachment_11563\" style=\"width: 571px\" class=\"wp-caption aligncenter\"><a href=\"http:\/\/embedded-lab.com\/blog\/wp-content\/uploads\/2016\/07\/photo.jpg\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-11563\" class=\"size-full wp-image-11563\" src=\"http:\/\/embedded-lab.com\/blog\/wp-content\/uploads\/2016\/07\/photo.jpg\" alt=\"DIY Spectrophotometer\" width=\"561\" height=\"414\" \/><\/a><p id=\"caption-attachment-11563\" class=\"wp-caption-text\">DIY Spectrophotometer<\/p><\/div>\n<blockquote><p>Building on some good work by others (<a href=\"https:\/\/publiclab.org\/wiki\/spectrometer\" target=\"_blank\">https:\/\/publiclab.org\/wiki\/spectrometer<\/a> and<a href=\"http:\/\/myspectral.com\/\" target=\"_blank\">http:\/\/myspectral.com\/<\/a> among others), this spectrophotometer has it&#8217;s own bright light (White LED), and uses a lock-in amp and photodiode as a sensitive detector. A Teensy 3.1 is used as the controller and the interface to transfer data to a pc for further analysis. The LED is a high power white one chosen for it&#8217;s broad light spectrum. The driver can be programmed (via a resistor) for varying power levels and the unit can be rapidly switched on and off for use with the lock-in amp. A piece from a DVD mounted on a servo motor creates the light spectrum that is moved past a slit, shines on the sample cuvette, and then on the photodiode.<\/p><\/blockquote>\n","protected":false},"excerpt":{"rendered":"<p>Spectrophotometers are used in scientific studies to quantitatively measure the absorption spectra of a sample object by passing a beam of light through\u00a0it. [doctek] is a contestant for Hackaday Prize 2016\u00a0and his entry for the contest is a DIY Spectrophotometer using Teensy. Building on some good work by others (https:\/\/publiclab.org\/wiki\/spectrometer andhttp:\/\/myspectral.com\/ among others), this spectrophotometer has it&#8217;s own bright light (White LED), and uses a lock-in amp and photodiode as a sensitive detector. A Teensy 3.1 is used as the controller and the interface to transfer data to a pc for further analysis. The LED is a high power white<\/p>\n","protected":false},"author":1,"featured_media":11563,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1024],"tags":[1430,1429],"class_list":["post-11562","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-arm-projects","tag-diy-spectrophotometer","tag-teensy"],"_links":{"self":[{"href":"https:\/\/embedded-lab.com\/blog\/wp-json\/wp\/v2\/posts\/11562","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/embedded-lab.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/embedded-lab.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/embedded-lab.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/embedded-lab.com\/blog\/wp-json\/wp\/v2\/comments?post=11562"}],"version-history":[{"count":1,"href":"https:\/\/embedded-lab.com\/blog\/wp-json\/wp\/v2\/posts\/11562\/revisions"}],"predecessor-version":[{"id":11564,"href":"https:\/\/embedded-lab.com\/blog\/wp-json\/wp\/v2\/posts\/11562\/revisions\/11564"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/embedded-lab.com\/blog\/wp-json\/wp\/v2\/media\/11563"}],"wp:attachment":[{"href":"https:\/\/embedded-lab.com\/blog\/wp-json\/wp\/v2\/media?parent=11562"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/embedded-lab.com\/blog\/wp-json\/wp\/v2\/categories?post=11562"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/embedded-lab.com\/blog\/wp-json\/wp\/v2\/tags?post=11562"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}