{"id":9588,"date":"2014-05-09T08:51:01","date_gmt":"2014-05-09T08:51:01","guid":{"rendered":"http:\/\/178.62.14.192\/?p=9588"},"modified":"2014-05-09T08:51:01","modified_gmt":"2014-05-09T08:51:01","slug":"seven-segments-of-raspberrypi-in-the-classroom-part-9-final-part","status":"publish","type":"post","link":"https:\/\/www.recantha.co.uk\/blog\/?p=9588","title":{"rendered":"Seven Segments of #RaspberryPi in the Classroom (part 9 &#8211; Final part!)"},"content":{"rendered":"<p><em>This is the final part of the Seven Segments of Pi series we&#8217;ve been running over the past few weeks. A massive Thank You! to Nevil Hunt for taking the time to share his adventures!<\/em><\/p>\n<p><a href=\"\/blog\/wp-content\/uploads\/2014\/04\/FromJamboreeToCamJam_Banner1.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-9241 alignnone\" src=\"\/blog\/wp-content\/uploads\/2014\/04\/FromJamboreeToCamJam_Banner1.jpg\" alt=\"FromJamboreeToCamJam_Banner\" width=\"434\" height=\"335\" srcset=\"https:\/\/i0.wp.com\/www.recantha.co.uk\/blog\/wp-content\/uploads\/2014\/04\/FromJamboreeToCamJam_Banner1.jpg?w=434&amp;ssl=1 434w, https:\/\/i0.wp.com\/www.recantha.co.uk\/blog\/wp-content\/uploads\/2014\/04\/FromJamboreeToCamJam_Banner1.jpg?resize=300%2C231&amp;ssl=1 300w\" sizes=\"auto, (max-width: 434px) 100vw, 434px\" \/><\/a><\/p>\n<p><strong>Part 9 &#8211; Have the Audacity to make your own sound effects! &#8230; D&#8217;oh! There&#8217;s no sound!<\/strong><\/p>\n<p>Last week I talked about how I came up with a game to play on the Seven Segments of Pi called \u201cFigure Eight My Pi\u201d and enjoyed seeing how the pupils were inspired to come up with their own ideas. In this week\u2019s final Blog in the series I will describe how the pupils embraced the challenge of writing their first computer game! I will also return to the thorny issue of sound from the Raspberry Pi when using a VGA Adapter! This Blog is entitled\u2026<\/p>\n<p style=\"text-align: center;\"><strong>\u201dHave the Audacity to make your own sound effects!<\/strong><\/p>\n<p style=\"text-align: center;\"><strong>&#8230;D\u2019oh! There\u2019s no sound!\u201d<\/strong><\/p>\n<p>When running the\u2026<\/p>\n<p><a href=\"\/blog\/wp-content\/uploads\/2014\/04\/PiStopWatch1.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-9239 alignnone\" src=\"\/blog\/wp-content\/uploads\/2014\/04\/PiStopWatch1.jpg\" alt=\"PiStopWatch\" width=\"238\" height=\"248\" \/><\/a><\/p>\n<p>\u2026Workshop I introduced Sound Effects which brought the Seven Segments of Pi \u2018alive\u2019! Sound Effects make such a difference and would be needed when the pupils wrote their own version of game \u201cFigure Eight My Pi\u201d! I got a sound effect file \u201c<strong>doh.wav<\/strong>\u201d with Homer Simpson saying\u2026<\/p>\n<p><a href=\"\/blog\/wp-content\/uploads\/2014\/05\/HomerSimpson_Doh1.png\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-9589 alignnone\" src=\"\/blog\/wp-content\/uploads\/2014\/05\/HomerSimpson_Doh1.png\" alt=\"HomerSimpson_Doh\" width=\"232\" height=\"213\" \/><\/a><\/p>\n<p>\u2026and gave the pupils a Python program, \u201c<strong>Seven_Segments_Sound.py<\/strong>\u201d, demonstrating how to generate this sound effect from Python. I was sure it would raise a chuckle when the pupils heard it!<\/p>\n<p>Everything worked fine at home. I had Homer Simpson coming out of my PC Speakers plugged into the Headphones Jack of my Raspberry Pi!<\/p>\n<p><a href=\"\/blog\/wp-content\/uploads\/2014\/05\/RaspberryPi_HeadphonesJack1.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-9590 alignnone\" src=\"\/blog\/wp-content\/uploads\/2014\/05\/RaspberryPi_HeadphonesJack1.jpg\" alt=\"RaspberryPi_HeadphonesJack\" width=\"276\" height=\"182\" \/><\/a><\/p>\n<p>I went into the first school.<\/p>\n<p>They ran \u201c<strong>Seven_Segments_Sound.py<\/strong>\u201d<\/p>\n<p>\u201cNow press the red PushButton\u201d I instructed expecting a cacophony of Homer Simpsons\u2026but instead there was silence!<\/p>\n<ul>\n<li><span style=\"letter-spacing: 0.05em;\">Were all the leads plugged in? Yes they were!<\/span><\/li>\n<li><span style=\"letter-spacing: 0.05em;\">Were all the speakers turned on?\u00a0 Yes they were!<\/span><\/li>\n<li><span style=\"letter-spacing: 0.05em;\">I was stumped! It had worked fine at home!<\/span><\/li>\n<\/ul>\n<p>I returned home, plugged everything together and ran the <strong><em>same<\/em><\/strong> \u201c<strong>Seven_Segments_Sound.py<\/strong>\u201d program on the <strong><em>same<\/em><\/strong> Raspberry Pi connected to the <strong><em>same<\/em><\/strong> speakers. Homer Simpson was heard loud and clear!<\/p>\n<p>I went into the second school, confident that I now had the sound working, but once again Homer Simpson stubbornly refused to co-operate!<\/p>\n<p>What was going on? The only difference between my setup at home and the setup in the Classroom was the monitor. How could the monitor have anything to do with the sound?<\/p>\n<p>I discovered that the Raspberry Pi has 3 audio modes\u2026<\/p>\n<ul>\n<li><strong style=\"letter-spacing: 0.05em;\">2 = Digital<\/strong><span style=\"letter-spacing: 0.05em;\"> where audio is always sent out of the HDMI port to an HDMI television<\/span><\/li>\n<li><strong style=\"letter-spacing: 0.05em;\">1 = Analog<\/strong><span style=\"letter-spacing: 0.05em;\"> where audio is always sent out of the 3.5mm Jack to Headphones or PC Speakers<\/span><\/li>\n<li><strong style=\"letter-spacing: 0.05em;\">0 = Auto<\/strong><span style=\"letter-spacing: 0.05em;\"> where the Raspberry Pi detects the type of monitor connected and sends sound to the HDMI port if it thinks an HDMI TV is connected, otherwise it sends audio to the 3.5mm Jack.<\/span><\/li>\n<\/ul>\n<p>\u2026and \u201c<strong>Auto<\/strong>\u201d is the default mode.<\/p>\n<p>At home I used a DVI monitor, which the Raspberry Pi correctly established was <strong><em>not<\/em><\/strong> an HDMI TV hence sent audio to my PC Speakers. In school, since the schools only had VGA Monitors, I used HDMI-to-VGA Adapters. These adapters were confusing the Raspberry Pi causing it to send audio to the HDMI port!<\/p>\n<p>I found the Linux Command\u2026<\/p>\n<p><strong>\u00a0 \u00a0sudo amixer cset numid=3 1<\/strong><\/p>\n<p>\u2026would force the sound out of the 3.5mm Headphones Jack.<\/p>\n<p>That would be fine for the Workshop but when the pupils returned home with their SD Card and plugged into their Raspberry Pi attached to their HDMI TV they would get no sound! <strong>Auto Audio Mode<\/strong> needed to work with HDMI-toVGA Adapters and to do so the HDMI-toVGA Adapters must correctly report back to the Raspberry Pi that it is <strong><em>not<\/em><\/strong> an HDMI TV!<\/p>\n<p>By now I had ten HDMI-to-VGA Adapters, all bought from Amazon and all supposedly made by Neewer. I tried them out and found 4 worked fine in <strong>Auto Audio Mode<\/strong>, correctly sending audio to the PC Speakers. 6 didn\u2019t!<\/p>\n<p>I have now checked several different HDMI-to-VGA Adapters and most <strong><em>don\u2019t<\/em><\/strong> handle <strong>Auto Audio Mode<\/strong> correctly! I can\u2019t recommend Neewer since there seems to be no way of knowing which version you will receive! The only HDMI-to-VGA Adapter I\u2019ve tested which handles <strong>Auto Audio Mode<\/strong> correctly (as well as correctly converting the video) that I can <strong><em>provisionally<\/em><\/strong> recommend is the <strong>Patuoxum<\/strong> sold by <strong>Patox<\/strong>, available via Amazon.<\/p>\n<p><strong>Back to the Classroom!<\/strong><\/p>\n<p>I now had over 20 pupils from 3 schools, aged from 10 to 15, most of whom now had a Raspberry Pi at home, writing their version of the game \u201cFigure Eight My Pi!\u201d<\/p>\n<p>It was quite a challenge. Some had parents who were software engineers to help at home, many did not! But they were all making progress!<\/p>\n<p>Just like the PiDice and the PiStopWatch they were not starting with a blank sheet of paper. I provided them with the starting software in which a single segment (<strong><em>The PiSeg!<\/em><\/strong>) went round the Seven Segment Display in a figure zero\u2026<\/p>\n<p><a href=\"\/blog\/wp-content\/uploads\/2014\/05\/Seven_Segments_of_Pi_Figure_Zero1.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-9534 alignnone\" src=\"\/blog\/wp-content\/uploads\/2014\/05\/Seven_Segments_of_Pi_Figure_Zero1.jpg\" alt=\"Seven_Segments_of_Pi_Figure_Zero\" width=\"238\" height=\"338\" srcset=\"https:\/\/i0.wp.com\/www.recantha.co.uk\/blog\/wp-content\/uploads\/2014\/05\/Seven_Segments_of_Pi_Figure_Zero1.jpg?w=238&amp;ssl=1 238w, https:\/\/i0.wp.com\/www.recantha.co.uk\/blog\/wp-content\/uploads\/2014\/05\/Seven_Segments_of_Pi_Figure_Zero1.jpg?resize=211%2C300&amp;ssl=1 211w\" sizes=\"auto, (max-width: 238px) 100vw, 238px\" \/><\/a><\/p>\n<p>Their first task was to make the single segment go round in a figure eight\u2026<\/p>\n<p><a href=\"\/blog\/wp-content\/uploads\/2014\/05\/Seven_Segments_of_Pi_Figure_Eight1.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-9533 alignnone\" src=\"\/blog\/wp-content\/uploads\/2014\/05\/Seven_Segments_of_Pi_Figure_Eight1.jpg\" alt=\"Seven_Segments_of_Pi_Figure_Eight\" width=\"238\" height=\"338\" srcset=\"https:\/\/i0.wp.com\/www.recantha.co.uk\/blog\/wp-content\/uploads\/2014\/05\/Seven_Segments_of_Pi_Figure_Eight1.jpg?w=238&amp;ssl=1 238w, https:\/\/i0.wp.com\/www.recantha.co.uk\/blog\/wp-content\/uploads\/2014\/05\/Seven_Segments_of_Pi_Figure_Eight1.jpg?resize=211%2C300&amp;ssl=1 211w\" sizes=\"auto, (max-width: 238px) 100vw, 238px\" \/><\/a><\/p>\n<p>\u2026then make it randomly decide whether to go in a figure zero or a figure eight.<\/p>\n<p>\u2026then add Sound Effects<\/p>\n<p>\u2026then detect if the PushButton is pressed when the centre segment is illuminated.<\/p>\n<p>\u2026then speed up a little each lap.<\/p>\n<p>\u2026then keep a score.<\/p>\n<p>They had now written their first computer game\u2026<\/p>\n<p><a href=\"\/blog\/wp-content\/uploads\/2014\/05\/Figure_Eight_My_Pi_without_Graphics1.png\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-9528 alignnone\" src=\"\/blog\/wp-content\/uploads\/2014\/05\/Figure_Eight_My_Pi_without_Graphics1.png\" alt=\"Figure_Eight_My_Pi_without_Graphics\" width=\"353\" height=\"60\" srcset=\"https:\/\/i0.wp.com\/www.recantha.co.uk\/blog\/wp-content\/uploads\/2014\/05\/Figure_Eight_My_Pi_without_Graphics1.png?w=353&amp;ssl=1 353w, https:\/\/i0.wp.com\/www.recantha.co.uk\/blog\/wp-content\/uploads\/2014\/05\/Figure_Eight_My_Pi_without_Graphics1.png?resize=300%2C50&amp;ssl=1 300w\" sizes=\"auto, (max-width: 353px) 100vw, 353px\" \/><\/a><\/p>\n<p>Some progressed faster than others. But that was fine! The pupils who by now had a working game became my Classroom \u201cSoftware Support Engineers\u201d and I employed them to help resolve the bugs in the software of their fellow pupils. This worked really well! Pupils now had help other than from me! And my \u201cSoftware Support Engineers\u201d had an opportunity to demonstrate to their fellow pupils, their new-found software skills!<\/p>\n<p>I still wanted to stretch the most able! So I gave them the challenge of making their own sound effects to use in their game by using the free audio capture and editing software\u2026<\/p>\n<p><a href=\"\/blog\/wp-content\/uploads\/2014\/05\/Audacity1.png\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-9591 alignnone\" src=\"\/blog\/wp-content\/uploads\/2014\/05\/Audacity1.png\" alt=\"Audacity\" width=\"179\" height=\"71\" \/><\/a><\/p>\n<p>Finally the end of term arrived. I was having one last workshop before they demonstrated what they\u2019d achieved to their fellow pupils, teachers and parents. It was nearly lunchtime and I was helping a pupil solve a tricky bug and I could hear the other pupils in the room\u2026but when I looked round the room was deserted! They had left their games playing and what I was <strong><em>actually<\/em><\/strong> hearing was their voices, recorded and edited using Audacity, being played as sound effects in their games!<\/p>\n<p>So on the last day of term they demonstrated what they had achieved. I had nothing more to do. I had no more software bugs to solve or bits of electronics to fix. I could just enjoy seeing the pride the pupils had explaining how their software worked to their fellow pupils, teachers and parents! It was without doubt one of the most satisfying moments in my life as a STEM Ambassador and gave me the spur to making the \u201cSeven Segments of Pi\u201d available as a kit so other pupils have the chance to take on the \u201cSeven Segments of Pi\u201d Challenge! And maybe in years to come the Raspberry Pi will be seen as having been the catalyst to creating a new generation of software and electronics engineers!<\/p>\n<p><a href=\"\/blog\/wp-content\/uploads\/2014\/05\/CholseyRaspberry-PiWorkshop-1.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-9592 alignnone\" src=\"\/blog\/wp-content\/uploads\/2014\/05\/CholseyRaspberry-PiWorkshop-1.jpg\" alt=\"CholseyRaspberry PiWorkshop\" width=\"448\" height=\"336\" srcset=\"https:\/\/i0.wp.com\/www.recantha.co.uk\/blog\/wp-content\/uploads\/2014\/05\/CholseyRaspberry-PiWorkshop-1.jpg?w=448&amp;ssl=1 448w, https:\/\/i0.wp.com\/www.recantha.co.uk\/blog\/wp-content\/uploads\/2014\/05\/CholseyRaspberry-PiWorkshop-1.jpg?resize=300%2C224&amp;ssl=1 300w\" sizes=\"auto, (max-width: 448px) 100vw, 448px\" \/><\/a><\/p>\n<p>Thank you for following this series of Blogs. If you are interested in learning more about the Seven Segments of Pi visit my Web Site <a href=\"http:\/\/www.sevensegmentsofpi.com\/\">www.SevenSegmentsOfPi.com<\/a> or watch the <a href=\"http:\/\/youtu.be\/t7XoYSxm3No\">\u201cSeven Segments of Pi\u201d YouTube Video<\/a>. You can also watch <a href=\"http:\/\/www.youtube.com\/watch?v=ul6nq9t1u9s\">Carrie Anne Philbin playing \u201cFigure Eight My Pi\u201d<\/a> at the CamJam, courtesy of Alex at RasPi TV.<\/p>\n<p><a href=\"\/blog\/wp-content\/uploads\/2014\/03\/NevilHuntPhoto_QuarterSize1.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-8687 alignnone\" src=\"\/blog\/wp-content\/uploads\/2014\/03\/NevilHuntPhoto_QuarterSize1.jpg\" alt=\"NevilHuntPhoto_QuarterSize\" width=\"514\" height=\"469\" srcset=\"https:\/\/i0.wp.com\/www.recantha.co.uk\/blog\/wp-content\/uploads\/2014\/03\/NevilHuntPhoto_QuarterSize1.jpg?w=514&amp;ssl=1 514w, https:\/\/i0.wp.com\/www.recantha.co.uk\/blog\/wp-content\/uploads\/2014\/03\/NevilHuntPhoto_QuarterSize1.jpg?resize=300%2C273&amp;ssl=1 300w\" sizes=\"auto, (max-width: 514px) 100vw, 514px\" \/><\/a><\/p>\n<p>Nevil Hunt<br \/>\n<a href=\"http:\/\/www.innovationsineducation.co.uk\/\">Innovations in Education<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>This is the final part of the Seven Segments of Pi series we&#8217;ve been running over the past few weeks. A massive Thank You! to Nevil Hunt for taking the time to share his adventures! Part 9 &#8211; Have the&hellip;<\/p>\n<p class=\"more-link-p\"><a class=\"more-link\" href=\"https:\/\/www.recantha.co.uk\/blog\/?p=9588\">Read more &rarr;<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2},"jetpack_post_was_ever_published":false},"categories":[17,20],"tags":[],"class_list":["post-9588","post","type-post","status-publish","format-standard","hentry","category-education","category-gpio-boards"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.6 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Seven Segments of #RaspberryPi in the Classroom (part 9 - Final part!) - Raspberry Pi Pod<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.recantha.co.uk\/blog\/?p=9588\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Seven Segments of #RaspberryPi in the Classroom (part 9 - Final part!) - Raspberry Pi Pod\" \/>\n<meta property=\"og:description\" content=\"This is the final part of the Seven Segments of Pi series we&#8217;ve been running over the past few weeks. A massive Thank You! to Nevil Hunt for taking the time to share his adventures! Part 9 &#8211; Have the&hellip;Read more &rarr;\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.recantha.co.uk\/blog\/?p=9588\" \/>\n<meta property=\"og:site_name\" content=\"Raspberry Pi Pod\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/recantha\/\" \/>\n<meta property=\"article:published_time\" content=\"2014-05-09T08:51:01+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.recantha.co.uk\/blog\/wp-content\/uploads\/2014\/04\/FromJamboreeToCamJam_Banner1.jpg\" \/>\n<meta name=\"author\" content=\"Michael Horne\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@recantha\" \/>\n<meta name=\"twitter:site\" content=\"@recantha\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Michael Horne\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"6 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/www.recantha.co.uk\\\/blog\\\/?p=9588#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.recantha.co.uk\\\/blog\\\/?p=9588\"},\"author\":{\"name\":\"Michael Horne\",\"@id\":\"https:\\\/\\\/www.recantha.co.uk\\\/blog\\\/#\\\/schema\\\/person\\\/c27c4ef2ee1c18b130f1fcd5dcdbb263\"},\"headline\":\"Seven Segments of #RaspberryPi in the Classroom (part 9 &#8211; 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