{"id":537,"date":"2026-03-20T13:51:47","date_gmt":"2026-03-20T17:51:47","guid":{"rendered":"https:\/\/commons.princeton.edu\/58-tiger-cub-2\/?p=537"},"modified":"2026-03-20T13:51:47","modified_gmt":"2026-03-20T17:51:47","slug":"wednesday-03-18-2026-notes-posted-by-diana-antonyan","status":"publish","type":"post","link":"https:\/\/commons.princeton.edu\/58-tiger-cub-2\/2026\/03\/20\/wednesday-03-18-2026-notes-posted-by-diana-antonyan\/","title":{"rendered":"Wednesday 03\/18\/2026\u00a0Notes (Posted by Diana Antonyan)"},"content":{"rendered":"<h3><b>Wednesday 03\/18\/2026\u00a0<\/b><\/h3>\n<h3><b>What Each Group Did on Monday<\/b><\/h3>\n<p><b>Wheel Group:<\/b><\/p>\n<ul>\n<li style=\"font-weight: 400\"><span style=\"font-weight: 400\">Cleaned forks, removing oil before sandblasting<\/span><\/li>\n<li style=\"font-weight: 400\"><span style=\"font-weight: 400\">Measured the leather seat dimensions<\/span><\/li>\n<\/ul>\n<p><b>Electrical Group:<\/b><\/p>\n<ul>\n<li style=\"font-weight: 400\"><span style=\"font-weight: 400\">Smoothed the kickstarter using emery paper so it is easier to remove<\/span><\/li>\n<li style=\"font-weight: 400\"><span style=\"font-weight: 400\">Reinstalled the gasket<\/span><\/li>\n<\/ul>\n<p><b>Clutch + Oil Group:<\/b><\/p>\n<ul>\n<li style=\"font-weight: 400\"><b>Team 1:<\/b>\n<ul>\n<li style=\"font-weight: 400\"><span style=\"font-weight: 400\">Cleaned the clutch plates<\/span><\/li>\n<li style=\"font-weight: 400\"><span style=\"font-weight: 400\">Installed the clutch plates and springs<\/span><\/li>\n<li style=\"font-weight: 400\"><span style=\"font-weight: 400\">Plan: begin working on the carburetor<\/span><\/li>\n<\/ul>\n<\/li>\n<li style=\"font-weight: 400\"><b>Team 2:<\/b>\n<ul>\n<li style=\"font-weight: 400\"><span style=\"font-weight: 400\">Worked on the brakes<\/span><\/li>\n<li style=\"font-weight: 400\"><span style=\"font-weight: 400\">Identified that the brakes were loose and attempted to fix them<\/span><\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p><b>Top + Bottom End Group:<\/b><\/p>\n<ul>\n<li style=\"font-weight: 400\"><span style=\"font-weight: 400\">Cleaned chains<\/span><\/li>\n<li style=\"font-weight: 400\"><span style=\"font-weight: 400\">Used electrolysis to remove rust<\/span><\/li>\n<li style=\"font-weight: 400\"><span style=\"font-weight: 400\">Calculated gear ratios<\/span><\/li>\n<\/ul>\n<h3><b>Demonstration: Rectifiers<\/b><\/h3>\n<ul>\n<li style=\"font-weight: 400\"><span style=\"font-weight: 400\">A rectifier has <\/span><b>three visible electrodes<\/b><span style=\"font-weight: 400\"> and a <\/span><b>fourth internal (hidden) connection<\/b><\/li>\n<li style=\"font-weight: 400\"><span style=\"font-weight: 400\">We need <\/span><b>DC (direct current)<\/b><span style=\"font-weight: 400\"> because the battery has a positive (+) and negative (\u2013) terminal<\/span><\/li>\n<li style=\"font-weight: 400\"><span style=\"font-weight: 400\">In motorcycles, the positive terminal is connected to <\/span><b>ground<\/b><\/li>\n<li style=\"font-weight: 400\"><span style=\"font-weight: 400\">The term <\/span><i><span style=\"font-weight: 400\">ground<\/span><\/i><span style=\"font-weight: 400\"> comes from using the Earth as a conductor<\/span><\/li>\n<\/ul>\n<p><b>Purpose of a Rectifier:<\/b><\/p>\n<ul>\n<li style=\"font-weight: 400\"><span style=\"font-weight: 400\">Converts <\/span><b>AC (alternating current)<\/b><span style=\"font-weight: 400\"> from the alternator into <\/span><b>DC<\/b><span style=\"font-weight: 400\"> to charge the battery<\/span><\/li>\n<\/ul>\n<p><b>Observations:<\/b><\/p>\n<ul>\n<li style=\"font-weight: 400\"><span style=\"font-weight: 400\">The rectifier has four terminals:<\/span>\n<ul>\n<li style=\"font-weight: 400\"><span style=\"font-weight: 400\">Two labeled <\/span><b>AC<\/b><\/li>\n<li style=\"font-weight: 400\"><span style=\"font-weight: 400\">One labeled <\/span><b>+<\/b><\/li>\n<li style=\"font-weight: 400\"><span style=\"font-weight: 400\">One labeled <\/span><b>\u2013<\/b><\/li>\n<\/ul>\n<\/li>\n<li style=\"font-weight: 400\"><span style=\"font-weight: 400\">It operates using <\/span><b>diodes<\/b><\/li>\n<\/ul>\n<h3><b>Circuit Simulator Explanation<\/b><\/h3>\n<ul>\n<li style=\"font-weight: 400\"><span style=\"font-weight: 400\">A simulation was shown using a <\/span><b>40 Hz AC source<\/b><\/li>\n<li style=\"font-weight: 400\"><span style=\"font-weight: 400\">Color indicators:<\/span>\n<ul>\n<li style=\"font-weight: 400\"><span style=\"font-weight: 400\">Green = positive<\/span><\/li>\n<li style=\"font-weight: 400\"><span style=\"font-weight: 400\">Red = negative<\/span><\/li>\n<\/ul>\n<\/li>\n<li style=\"font-weight: 400\"><span style=\"font-weight: 400\">Yellow dots show the <\/span><b>direction of current flow<\/b><\/li>\n<\/ul>\n<p><b>Key Concepts:<\/b><\/p>\n<ul>\n<li style=\"font-weight: 400\"><span style=\"font-weight: 400\">Current flows in <\/span><b>one direction only<\/b><span style=\"font-weight: 400\"> in this setup<\/span><\/li>\n<li style=\"font-weight: 400\"><span style=\"font-weight: 400\">A <\/span><b>diode<\/b><span style=\"font-weight: 400\"> acts like a <\/span><b>one-way valve<\/b><span style=\"font-weight: 400\"> for current<\/span><\/li>\n<\/ul>\n<h3><b>How AC is Converted to DC (Bridge Rectifier)<\/b><\/h3>\n<ul>\n<li style=\"font-weight: 400\"><span style=\"font-weight: 400\">Four diodes are arranged to form a <\/span><b>bridge rectifier<\/b><\/li>\n<li style=\"font-weight: 400\"><span style=\"font-weight: 400\">A resistor is placed in the circuit<\/span><\/li>\n<li style=\"font-weight: 400\"><span style=\"font-weight: 400\">The AC source is connected to the bridge<\/span><\/li>\n<\/ul>\n<p><b>How it works:<\/b><\/p>\n<ul>\n<li style=\"font-weight: 400\"><span style=\"font-weight: 400\">Current takes a <\/span><b>zigzag path<\/b><span style=\"font-weight: 400\"> through different diodes depending on the AC cycle<\/span><\/li>\n<li style=\"font-weight: 400\"><span style=\"font-weight: 400\">Even when AC reverses direction, the output remains:<\/span>\n<ul>\n<li style=\"font-weight: 400\"><span style=\"font-weight: 400\">One side always <\/span><b>positive<\/b><\/li>\n<li style=\"font-weight: 400\"><span style=\"font-weight: 400\">One side always <\/span><b>negative<\/b><\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p><b>Application:<\/b><\/p>\n<ul>\n<li style=\"font-weight: 400\"><span style=\"font-weight: 400\">The <\/span><b>alternator<\/b><span style=\"font-weight: 400\"> acts as the AC source<\/span><\/li>\n<li style=\"font-weight: 400\"><span style=\"font-weight: 400\">The <\/span><b>battery<\/b><span style=\"font-weight: 400\"> receives the rectified DC output<\/span><\/li>\n<\/ul>\n<h3><b>Rectifier Testing Demonstration<\/b><\/h3>\n<ul>\n<li style=\"font-weight: 400\"><span style=\"font-weight: 400\">Red probe connected to AC terminal, black probe to negative terminal \u2192 reading of about <\/span><b>0.5 volts<\/b><\/li>\n<li style=\"font-weight: 400\"><span style=\"font-weight: 400\">When leads are reversed \u2192 <\/span><b>overload reading<\/b><span style=\"font-weight: 400\">, meaning no current flows<\/span><\/li>\n<li style=\"font-weight: 400\"><span style=\"font-weight: 400\">This demonstrates the <\/span><b>one-way behavior of diodes<\/b><\/li>\n<\/ul>\n<h3><b>Discussion: <\/b><b><i>Shop Class as Soulcraft<\/i><\/b><b> by Matthew B. Crawford<\/b><\/h3>\n<p><b>Main Ideas:<\/b><\/p>\n<ul>\n<li style=\"font-weight: 400\"><span style=\"font-weight: 400\">Emphasizes the value of <\/span><b>manual labor<\/b><span style=\"font-weight: 400\"> and its intellectual demands<\/span><\/li>\n<li style=\"font-weight: 400\"><span style=\"font-weight: 400\">Argues that <\/span><b>repair skills<\/b><span style=\"font-weight: 400\"> are important and meaningful<\/span><\/li>\n<li style=\"font-weight: 400\"><span style=\"font-weight: 400\">Suggests manual trades are a <\/span><b>valid alternative career path<\/b><span style=\"font-weight: 400\"> to traditional academic routes<\/span><\/li>\n<\/ul>\n<p><b>Craftsman vs. Tradesman:<\/b><\/p>\n<ul>\n<li style=\"font-weight: 400\"><i><span style=\"font-weight: 400\">Craftsman<\/span><\/i><span style=\"font-weight: 400\">: more personal, focused on mastery<\/span><\/li>\n<li style=\"font-weight: 400\"><i><span style=\"font-weight: 400\">Tradesman<\/span><\/i><span style=\"font-weight: 400\">: more economically practical and sustainable<\/span><\/li>\n<\/ul>\n<p><b>Critique of Modern Work:<\/b><\/p>\n<ul>\n<li style=\"font-weight: 400\"><span style=\"font-weight: 400\">In many office jobs, there is <\/span><b>no clear objective measure<\/b><span style=\"font-weight: 400\"> of success<\/span><\/li>\n<li style=\"font-weight: 400\"><span style=\"font-weight: 400\">In manual work, success is clearer:<\/span>\n<ul>\n<li style=\"font-weight: 400\"><span style=\"font-weight: 400\">If something works, the job was done well<\/span><\/li>\n<\/ul>\n<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>Wednesday 03\/18\/2026\u00a0 What Each Group Did on Monday Wheel Group: Cleaned forks, removing oil before sandblasting Measured the leather seat dimensions Electrical Group: Smoothed the kickstarter using emery paper so it is easier to remove Reinstalled the gasket Clutch + Oil Group: Team 1: Cleaned the clutch plates Installed the clutch plates and springs Plan: &hellip; <a href=\"https:\/\/commons.princeton.edu\/58-tiger-cub-2\/2026\/03\/20\/wednesday-03-18-2026-notes-posted-by-diana-antonyan\/\" class=\"more-link\">Continue reading<span class=\"screen-reader-text\"> &#8220;Wednesday 03\/18\/2026\u00a0Notes (Posted by Diana Antonyan)&#8221;<\/span><\/a><\/p>\n","protected":false},"author":7312,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-537","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"_links":{"self":[{"href":"https:\/\/commons.princeton.edu\/58-tiger-cub-2\/wp-json\/wp\/v2\/posts\/537","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/commons.princeton.edu\/58-tiger-cub-2\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/commons.princeton.edu\/58-tiger-cub-2\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/commons.princeton.edu\/58-tiger-cub-2\/wp-json\/wp\/v2\/users\/7312"}],"replies":[{"embeddable":true,"href":"https:\/\/commons.princeton.edu\/58-tiger-cub-2\/wp-json\/wp\/v2\/comments?post=537"}],"version-history":[{"count":1,"href":"https:\/\/commons.princeton.edu\/58-tiger-cub-2\/wp-json\/wp\/v2\/posts\/537\/revisions"}],"predecessor-version":[{"id":538,"href":"https:\/\/commons.princeton.edu\/58-tiger-cub-2\/wp-json\/wp\/v2\/posts\/537\/revisions\/538"}],"wp:attachment":[{"href":"https:\/\/commons.princeton.edu\/58-tiger-cub-2\/wp-json\/wp\/v2\/media?parent=537"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/commons.princeton.edu\/58-tiger-cub-2\/wp-json\/wp\/v2\/categories?post=537"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/commons.princeton.edu\/58-tiger-cub-2\/wp-json\/wp\/v2\/tags?post=537"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}