{"id":8621,"date":"2019-09-07T19:15:41","date_gmt":"2019-09-07T19:15:41","guid":{"rendered":"https:\/\/stevepedwards.today\/stevepedwards.com\/ElectronicsStuff\/?p=8621"},"modified":"2019-09-11T00:32:08","modified_gmt":"2019-09-10T23:32:08","slug":"astable-multivibrator-from-great-scott","status":"publish","type":"post","link":"https:\/\/stevepedwards.today\/ElectronicsStuff\/astable-multivibrator-from-great-scott\/","title":{"rendered":"Astable Multivibrator from Great Scott Channel"},"content":{"rendered":"<p>&nbsp;<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-large wp-image-8631\" src=\"https:\/\/stevepedwards.today\/ElectronicsStuff\/wp-content\/uploads\/2019\/09\/Xtal-1024x576.png\" alt=\"\" width=\"840\" height=\"473\" srcset=\"https:\/\/stevepedwards.today\/ElectronicsStuff\/wp-content\/uploads\/2019\/09\/Xtal-1024x576.png 1024w, https:\/\/stevepedwards.today\/ElectronicsStuff\/wp-content\/uploads\/2019\/09\/Xtal-300x169.png 300w, https:\/\/stevepedwards.today\/ElectronicsStuff\/wp-content\/uploads\/2019\/09\/Xtal-768x432.png 768w, https:\/\/stevepedwards.today\/ElectronicsStuff\/wp-content\/uploads\/2019\/09\/Xtal-1200x675.png 1200w, https:\/\/stevepedwards.today\/ElectronicsStuff\/wp-content\/uploads\/2019\/09\/Xtal.png 1920w\" sizes=\"auto, (max-width: 840px) 100vw, 840px\" \/>Above is Scott's Crystal Oscillator circuit I failed with due to not having correct value parts (and it seems crystals are a pig to get oscillating on a breadboard anyway!), so moved on to his astable multivibrator circuit instead. I had some hassle getting this thing going too due to bad bread board connections (used 2N2222 transistors), as with no caps, the LEDs light anyway but stay on!<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-8703\" src=\"https:\/\/stevepedwards.today\/ElectronicsStuff\/wp-content\/uploads\/2019\/09\/astable.png\" alt=\"\" width=\"399\" height=\"431\" \/><\/p>\n<p>I changed Scott's 10uF to 100uF caps to slow it down,-\u00a0 to be sure I could see change. Later, when working, the 10uF caps gave-\u00a0 a 16.8Hz ramp --\u00a0 an annoying flicker rate! 100uFs gave a 1.39Hz ramp.<\/p>\n<p><iframe loading=\"lazy\" title=\"Astable multivibrator\" width=\"1333\" height=\"1000\" src=\"https:\/\/www.youtube.com\/embed\/wYaaHFZqwN0?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe><\/p>\n<p>Move your probe to different places to see the various ramp waveforms possible.<\/p>\n<p><iframe loading=\"lazy\" title=\"Electronic Basics #17: Oscillators || RC, LC, Crystal\" width=\"1778\" height=\"1000\" src=\"https:\/\/www.youtube.com\/embed\/eYVOdlK15Og?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe><\/p>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>&nbsp; Above is Scott's Crystal Oscillator circuit I failed with due to not having correct value parts (and it seems crystals are a pig to get oscillating on a breadboard anyway!), so moved on to his astable multivibrator circuit instead. I had some hassle getting this thing going too due to bad bread board connections <a href=\"https:\/\/stevepedwards.today\/ElectronicsStuff\/astable-multivibrator-from-great-scott\/\" class=\"more-link\">...<span class=\"screen-reader-text\">  Astable Multivibrator from Great Scott Channel<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[2],"tags":[],"class_list":["post-8621","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"_links":{"self":[{"href":"https:\/\/stevepedwards.today\/ElectronicsStuff\/wp-json\/wp\/v2\/posts\/8621","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/stevepedwards.today\/ElectronicsStuff\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/stevepedwards.today\/ElectronicsStuff\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/stevepedwards.today\/ElectronicsStuff\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/stevepedwards.today\/ElectronicsStuff\/wp-json\/wp\/v2\/comments?post=8621"}],"version-history":[{"count":2,"href":"https:\/\/stevepedwards.today\/ElectronicsStuff\/wp-json\/wp\/v2\/posts\/8621\/revisions"}],"predecessor-version":[{"id":8686,"href":"https:\/\/stevepedwards.today\/ElectronicsStuff\/wp-json\/wp\/v2\/posts\/8621\/revisions\/8686"}],"wp:attachment":[{"href":"https:\/\/stevepedwards.today\/ElectronicsStuff\/wp-json\/wp\/v2\/media?parent=8621"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/stevepedwards.today\/ElectronicsStuff\/wp-json\/wp\/v2\/categories?post=8621"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/stevepedwards.today\/ElectronicsStuff\/wp-json\/wp\/v2\/tags?post=8621"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}