{"id":12391,"date":"2017-07-06T10:56:10","date_gmt":"2017-07-06T00:56:10","guid":{"rendered":"http:\/\/legoeng.local\/?p=12391"},"modified":"2018-12-20T14:32:18","modified_gmt":"2018-12-20T03:32:18","slug":"light-and-dark-scavenger-hunt","status":"publish","type":"post","link":"http:\/\/legoeng.local\/light-and-dark-scavenger-hunt\/","title":{"rendered":"Light and Dark Scavenger Hunt"},"content":{"rendered":"<p>This challenge provides a basic introduction to datalogging with EV3.<\/p>\n<p>Datalogging enables you to collect data from one or more sensors connected to the EV3 brick over a period of time. It is possible to log data directly from the EV3 brick, but the focus here is on using the EV3 Software to set up and run a datalogging experiment.<\/p>\n<figure id=\"attachment_12465\" aria-describedby=\"caption-attachment-12465\" style=\"width: 300px\" class=\"wp-caption alignright\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-12465 size-medium\" src=\"http:\/\/legoeng.local\/wp-content\/uploads\/2017\/07\/EV3-brick-and-colour-sensor-300x200.jpg\" alt=\"EV3 brick and colour sensor\" width=\"300\" height=\"200\" srcset=\"http:\/\/legoeng.local\/wp-content\/uploads\/2017\/07\/EV3-brick-and-colour-sensor-300x200.jpg 300w, http:\/\/legoeng.local\/wp-content\/uploads\/2017\/07\/EV3-brick-and-colour-sensor-768x513.jpg 768w, http:\/\/legoeng.local\/wp-content\/uploads\/2017\/07\/EV3-brick-and-colour-sensor.jpg 1024w, http:\/\/legoeng.local\/wp-content\/uploads\/2017\/07\/EV3-brick-and-colour-sensor-600x401.jpg 600w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><figcaption id=\"caption-attachment-12465\" class=\"wp-caption-text\">EV3 brick and colour sensor<\/figcaption><\/figure>\n<h2>The challenge<\/h2>\n<p>Collect a wide range of light readings from your environment and display them on your computer screen.<\/p>\n<h2>Equipment<\/h2>\n<p>You need:<\/p>\n<ul>\n<li>a colour sensor<\/li>\n<li>an EV3 brick<\/li>\n<li>the EV3 Software<\/li>\n<\/ul>\n<h2>Create your experiment<\/h2>\n<ol>\n<li>Connect the colour sensor to the EV3 brick and remove any additional sensors or motors.\n<ul>\n<li>Note: The software automatically detects any sensors (including motors) that are connected to the EV3 brick. Remove additional sensors before you start to keep things simpler.<\/li>\n<\/ul>\n<\/li>\n<li>In the EV3 Software, create a new experiment (e.g. File &gt; New Project &gt; Experiment). will appear at the bottom of the screen.\n<figure id=\"attachment_12394\" aria-describedby=\"caption-attachment-12394\" style=\"width: 736px\" class=\"wp-caption alignnone\"><a href=\"http:\/\/legoeng.local\/wp-content\/uploads\/2017\/07\/Sensor-setup-experiment-configuration.png\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-12394 size-full\" src=\"http:\/\/legoeng.local\/wp-content\/uploads\/2017\/07\/Sensor-setup-experiment-configuration.png\" alt=\"\" width=\"736\" height=\"104\" srcset=\"http:\/\/legoeng.local\/wp-content\/uploads\/2017\/07\/Sensor-setup-experiment-configuration.png 736w, http:\/\/legoeng.local\/wp-content\/uploads\/2017\/07\/Sensor-setup-experiment-configuration-300x42.png 300w, http:\/\/legoeng.local\/wp-content\/uploads\/2017\/07\/Sensor-setup-experiment-configuration-600x85.png 600w\" sizes=\"(max-width: 736px) 100vw, 736px\" \/><\/a><figcaption id=\"caption-attachment-12394\" class=\"wp-caption-text\">The Experiment Configuration settings<\/figcaption><\/figure><\/li>\n<li>Check that the Colour Sensor is selected, and change the mode to \u201cAmbient Light Intensity\u201d.\n<ul>\n<li>Note: You can also adjust the Duration, Rate, Sensor Port, or Colour of the graph if you like.<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n<h2>Run your experiment<\/h2>\n<p>There are two ways to run your experiment:<\/p>\n<ol>\n<li>Tethered \u2013 With the EV3 still connected to your computer, you can run the experiment and view the results as they are being collected.<\/li>\n<li>Untethered \u2013 Download the experiment, and then unplug the USB cable from the EV3 brick, collect your results, and then upload the results to view them.<\/li>\n<\/ol>\n<p><a href=\"http:\/\/legoeng.local\/wp-content\/uploads\/2017\/07\/Download-run-upload.png\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-12395\" src=\"http:\/\/legoeng.local\/wp-content\/uploads\/2017\/07\/Download-run-upload.png\" alt=\"\" width=\"398\" height=\"206\" srcset=\"http:\/\/legoeng.local\/wp-content\/uploads\/2017\/07\/Download-run-upload.png 398w, http:\/\/legoeng.local\/wp-content\/uploads\/2017\/07\/Download-run-upload-300x155.png 300w\" sizes=\"(max-width: 398px) 100vw, 398px\" \/><\/a><\/p>\n<p>Your results might look something like this&#8230;<\/p>\n<p><a href=\"http:\/\/legoeng.local\/wp-content\/uploads\/2017\/07\/light-and-dark-scavenger-hunt-example-results.png\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-12466\" src=\"http:\/\/legoeng.local\/wp-content\/uploads\/2017\/07\/light-and-dark-scavenger-hunt-example-results.png\" alt=\"\" width=\"994\" height=\"585\" srcset=\"http:\/\/legoeng.local\/wp-content\/uploads\/2017\/07\/light-and-dark-scavenger-hunt-example-results.png 994w, http:\/\/legoeng.local\/wp-content\/uploads\/2017\/07\/light-and-dark-scavenger-hunt-example-results-300x177.png 300w, http:\/\/legoeng.local\/wp-content\/uploads\/2017\/07\/light-and-dark-scavenger-hunt-example-results-768x452.png 768w, http:\/\/legoeng.local\/wp-content\/uploads\/2017\/07\/light-and-dark-scavenger-hunt-example-results-600x353.png 600w\" sizes=\"(max-width: 994px) 100vw, 994px\" \/><\/a><\/p>\n<h2>Tip and tricks<\/h2>\n<ul>\n<li>Disconnect any sensors that you don&#8217;t need (including motors) before creating a new experiment.<\/li>\n<li>When running your experiment untethered, you can tell when data collection has finished by taking note of the EV3 brick&#8217;s status light. It flashes green when the experiment is running and stops when it has finished.<\/li>\n<li>If you&#8217;re collecting data for an extended period of time&#8230;\n<ul>\n<li>remember that you can have the battery pack plugged in and charging while the EV3 brick is running<\/li>\n<li>on the EV3 brick &gt; Tools tab, set the Sleep option to &#8220;never&#8221; so that the EV3 brick doesn&#8217;t automatically power down while you&#8217;re datalogging.<\/li>\n<\/ul>\n<\/li>\n<li>Some toolbar icons to know about\u2026<\/li>\n<\/ul>\n<p><a href=\"http:\/\/legoeng.local\/wp-content\/uploads\/2017\/07\/Datalogging-toolbar-1.png\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-12397\" src=\"http:\/\/legoeng.local\/wp-content\/uploads\/2017\/07\/Datalogging-toolbar-1.png\" alt=\"\" width=\"746\" height=\"189\" srcset=\"http:\/\/legoeng.local\/wp-content\/uploads\/2017\/07\/Datalogging-toolbar-1.png 746w, http:\/\/legoeng.local\/wp-content\/uploads\/2017\/07\/Datalogging-toolbar-1-300x76.png 300w, http:\/\/legoeng.local\/wp-content\/uploads\/2017\/07\/Datalogging-toolbar-1-600x152.png 600w\" sizes=\"(max-width: 746px) 100vw, 746px\" \/><\/a><\/p>\n<ul>\n<li>Select the Dataset Table to view, delete, or adjust display options of a dataset\u2026<\/li>\n<\/ul>\n<p><a href=\"http:\/\/legoeng.local\/wp-content\/uploads\/2017\/07\/Dataset-table.png\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-12405\" src=\"http:\/\/legoeng.local\/wp-content\/uploads\/2017\/07\/Dataset-table.png\" alt=\"\" width=\"742\" height=\"103\" srcset=\"http:\/\/legoeng.local\/wp-content\/uploads\/2017\/07\/Dataset-table.png 742w, http:\/\/legoeng.local\/wp-content\/uploads\/2017\/07\/Dataset-table-300x42.png 300w, http:\/\/legoeng.local\/wp-content\/uploads\/2017\/07\/Dataset-table-600x83.png 600w\" sizes=\"(max-width: 742px) 100vw, 742px\" \/><\/a><\/p>\n<ul>\n<li>To export the collected data (e.g. to open in Microsoft Excel), use the menu option: Tools &gt; Export Datasets. For more help with this, see <a href=\"http:\/\/legoeng.local\/how-to-export-an-ev3-data-file-to-excel\/\">How to export an EV3 data file (*.rdf) to Excel<\/a>.<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>This challenge provides a basic introduction to datalogging with EV3. Datalogging enables you to collect data from one or more sensors connected to the EV3 brick over a period of time. It is possible to log data directly from the EV3 brick, but the focus here is on using the EV3 Software to set up [&hellip;]<\/p>\n","protected":false},"author":4,"featured_media":12466,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[99],"tags":[578,74,139,73],"_links":{"self":[{"href":"http:\/\/legoeng.local\/wp-json\/wp\/v2\/posts\/12391"}],"collection":[{"href":"http:\/\/legoeng.local\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/legoeng.local\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/legoeng.local\/wp-json\/wp\/v2\/users\/4"}],"replies":[{"embeddable":true,"href":"http:\/\/legoeng.local\/wp-json\/wp\/v2\/comments?post=12391"}],"version-history":[{"count":0,"href":"http:\/\/legoeng.local\/wp-json\/wp\/v2\/posts\/12391\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"http:\/\/legoeng.local\/wp-json\/wp\/v2\/media\/12466"}],"wp:attachment":[{"href":"http:\/\/legoeng.local\/wp-json\/wp\/v2\/media?parent=12391"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/legoeng.local\/wp-json\/wp\/v2\/categories?post=12391"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/legoeng.local\/wp-json\/wp\/v2\/tags?post=12391"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}