{"id":17245,"date":"2026-07-13T19:25:26","date_gmt":"2026-07-13T19:25:26","guid":{"rendered":"https:\/\/8657085.xyz\/?p=17245"},"modified":"2026-07-13T19:25:26","modified_gmt":"2026-07-13T19:25:26","slug":"this-newtons-cradle-refuses-to-quit-thanks-to-timed-electromagnetic-kicks","status":"publish","type":"post","link":"https:\/\/8657085.xyz\/?p=17245","title":{"rendered":"This Newton&#8217;s Cradle Refuses to Quit Thanks to Timed Electromagnetic Kicks"},"content":{"rendered":"<p> <div style=\"display: grid; grid-template-columns: 300px 160px; gap: 2px; width: 460px; background: #eee; padding: 2px;\">\r\n\r\n  <!-- \u6574\u884c\u5bbd\u5e7f\u544a -->\r\n  <div style=\"grid-column: 1\/-1; width: 460px; height: 250px; background: #ccc; display: grid; place-items: center;\">\r\n  <script async type=\"application\/javascript\" src=\"https:\/\/a.magsrv.com\/ad-provider.js\"><\/script> \r\n <ins class=\"eas6a97888e2\" data-zoneid=\"5876674\"><\/ins> \r\n <script>(AdProvider = window.AdProvider || []).push({\"serve\": {}});<\/script>\r\n  <\/div>\r\n  <div style=\"grid-column: 1\/-1; width: 460px; height: 90px; background: #ccc; display: grid; place-items: center;\">\r\n  <script async type=\"application\/javascript\" src=\"https:\/\/a.magsrv.com\/ad-provider.js\"><\/script> \r\n <ins class=\"eas6a97888e2\" data-zoneid=\"5876676\"><\/ins> \r\n <script>(AdProvider = window.AdProvider || []).push({\"serve\": {}});<\/script>\r\n  <\/div>\r\n\r\n  <!-- \u5de6\u4fa7\u7ad6\u6392 -->\r\n  <div style=\"height: 250px; background: #ccc; display: grid; place-items: center;\">\r\n  <script async type=\"application\/javascript\" src=\"https:\/\/a.magsrv.com\/ad-provider.js\"><\/script> \r\n <ins class=\"eas6a97888e2\" data-zoneid=\"5876672\"><\/ins> \r\n <script>(AdProvider = window.AdProvider || []).push({\"serve\": {}});<\/script>\r\n  <\/div>\r\n  <div style=\"height: 500px; background: #ccc; display: grid; place-items: center;\">\r\n  <script async type=\"application\/javascript\" src=\"https:\/\/a.magsrv.com\/ad-provider.js\"><\/script> \r\n <ins class=\"eas6a97888e2\" data-zoneid=\"5876680\"><\/ins> \r\n <script>(AdProvider = window.AdProvider || []).push({\"serve\": {}});<\/script>\r\n  <\/div>\r\n\r\n  <!-- \u53f3\u4fa7\u6469\u5929\u697c\uff08\u548c\u5de6\u4fa7\u5b8c\u5168\u5bf9\u9f50\uff09 -->\r\n  <div style=\"grid-row: 3\/5; height: 750px; background: #ccc; display: grid; place-items: center;\">\r\n  <script async type=\"application\/javascript\" src=\"https:\/\/a.magsrv.com\/ad-provider.js\"><\/script> \r\n <ins class=\"eas6a97888e2\" data-zoneid=\"5876678\"><\/ins> \r\n <script>(AdProvider = window.AdProvider || []).push({\"serve\": {}});<\/script>\r\n  <\/div>\r\n  \r\n  <script async type=\"application\/javascript\" src=\"https:\/\/a.magsrv.com\/ad-provider.js\"><\/script> \r\n <ins class=\"eas6a97888e6\" data-zoneid=\"5876682\"><\/ins> \r\n <script>(AdProvider = window.AdProvider || []).push({\"serve\": {}});<\/script>\r\n<\/div><br \/>\n<\/p>\n<div>\n<p><img decoding=\"async\" src=\"https:\/\/images.techeblog.com\/wp-content\/uploads\/2026\/07\/13105143\/perpetual-newtons-cradle-never-stops.jpg\" alt=\"Perpetual Newton's Cradle Never Stops\" width=\"1280\" height=\"853\"\/><br \/>Newton\u2019s Cradles have long been staples on office desks, their five steel balls transferring motion in a satisfying chain of collisions. Most versions eventually lose their rhythm as energy dissipates through air resistance, sound, heat, and slight changes in the shape of the balls during impact. A recent project changes the outcome by adding a small, precisely timed push that replaces those losses. The result looks like the classic toy yet keeps swinging for hours on battery power alone.<\/p>\n<p><span id=\"more-250125\"\/><br \/><iframe title=\"I Built a Newton&amp;apos;s Cradle That Never Stops\" width=\"640\" height=\"360\" src=\"https:\/\/www.youtube.com\/embed\/U2TCAR9FwdM?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><noscript><iframe title=\"I Built a Newton&amp;apos;s Cradle That Never Stops\" width=\"640\" height=\"360\" src=\"https:\/\/www.youtube.com\/embed\/U2TCAR9FwdM?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><\/noscript><br \/>The solution is based on some cleverness, with an inductive proximity sensor that is activated when one of the end balls begins to descend. The microcontroller then takes over and provides a short charge of current to the electromagnet located immediately below the ball\u2019s path, just enough to give it a slight nudge and restore energy that would otherwise be lost. Timing is key in this situation; if you do it too soon or too late, the ball will either not get any help or will be yanked out of its natural swing. The builder began with two sensors for early experiments to obtain a strong grasp on the motion, but then reduced it to one sensor and some predictive math based on the swing rate, which appeared to function just as well with less hardware.<\/p>\n<div class=\"aawp\">\n<div class=\"aawp-product aawp-product--horizontal\" data-aawp-product-asin=\"B07Y5S5YWR\" data-aawp-product-id=\"247607\" data-aawp-tracking-id=\"tec02e-20\" data-aawp-product-title=\"CERROPI Large Newtons Cradle Pendulum with 7 Balls Physics Perpetual Motion Desk Toys for Office Calm Down Fidgets 50+ Sec Swingtime  Beech Base\">\n<div class=\"aawp-product__thumb\">\n<p>            <img decoding=\"async\" class=\"aawp-product__image\" src=\"https:\/\/m.media-amazon.com\/images\/I\/319zWx66qoL._SL160_.jpg\" alt=\"CERROPI Large Newtons Cradle Pendulum with 7 Balls, Physics Perpetual Motion Desk Toys for Office, Calm...\"\/><\/p><\/div>\n<div class=\"aawp-product__content\">\n<p>            CERROPI Large Newtons Cradle Pendulum with 7 Balls, Physics Perpetual Motion Desk Toys for Office, Calm&#8230;        <\/p>\n<div class=\"aawp-product__description\">\n<ul>\n<li>SCIENTIFIC DESIGN\uff1aCERROPI newton&#8217;s cradle adopt scientific design,keep the pendulum balls perfectly lined up,make it possible to swing 50s+. Perfect&#8230;<\/li>\n<li>SUPERIOR QUALITY\uff1aOur newtons cradle made of 8mm chromed metal steel bar, 20mm steel Ball,high-impact nylon, ultra-thin nano technology provide&#8230;<\/li>\n<li>WIDE APPLICATION\uff1aThis newton balls can be used as office desk gadgets toys to relieve stress; as teaching aid,teaching science intuitively; as toys&#8230;<\/li>\n<\/ul><\/div>\n<\/p><\/div>\n<\/div>\n<\/div>\n<p>\n<img decoding=\"async\" src=\"https:\/\/images.techeblog.com\/wp-content\/uploads\/2026\/07\/13105928\/perpetual-newtons-cradle-never-stops-1.jpg\" alt=\"Perpetual Newton's Cradle Never Stops\" width=\"1280\" height=\"720\"\/><br \/>\nThe power comes from a rechargeable 18650 battery cell, which receives a voltage increase via a boost converter to give the electromagnet a solid, strong push. A MOSFET does the switching, while a diode protects the circuit from voltage spikes when the coil turns off. When it\u2019s time to charge the battery, simply plug it into a USB-C socket embedded inside the base. There is an issue with ball weight changes, which might cause undesired vibrations in the intermediate balls. So the builder installed some small permanent magnets to provide a modest downward drag, helping to suppress resonance and keep the energy flowing smoothly from end to end.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/images.techeblog.com\/wp-content\/uploads\/2026\/07\/13105936\/perpetual-newtons-cradle-never-stops-2.jpg\" alt=\"Perpetual Newton's Cradle Never Stops\" width=\"1280\" height=\"720\"\/><br \/>The frame started off as a normal cradle that you could buy off the shelf. The main custom work is fitting the electromagnet and sensor into the base without changing the outward appearance too much. As it turned out, the build ended up looking like a cute little warship, complete with raised accents that conceal the battery, circuit board, and wires, as well as the charging port, which is tucked away under a magnetic cover.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/images.techeblog.com\/wp-content\/uploads\/2026\/07\/13105943\/perpetual-newtons-cradle-never-stops-3.jpg\" alt=\"Perpetual Newton's Cradle Never Stops\" width=\"1280\" height=\"720\"\/><br \/>Assembly begins by arranging the mechanicals by suspending the steel balls from the frame with strings or cables, and then attaching the electromagnet just below one of the end balls. Then you continue on to the electronics, aligning the proximity sensor to detect the ball\u2019s approach, routing the wires to the microcontroller board, and soldering the power components in place. The microcontroller\u2019s firmware detects the ball and calculates the pulse length, and then it\u2019s just a matter of fitting everything into the enclosure, attaching the stabilizing magnets, and giving it a test swing to ensure everything works properly.<br \/><span>[Source]<\/span><\/p>\n<\/p><\/div>\n<p><!-- \u603b\u5bb9\u5668\uff1a\u6700\u5927\u5bbd908px Grid\u7d27\u51d1\u5e03\u5c40 -->\r\n<div style=\"display: grid; grid-template-columns: 728px 160px; gap:2px; width:908px; background:#eee; padding:2px;\">\r\n\r\n  <!-- \u901a\u680f\u9876\u90e8\uff1a\u6700\u5927\u6a2a\u5e45 908x258 \u8de8\u6574\u884c -->\r\n  <div style=\"grid-column:1\/-1; height:258px; background:#ff6b6b; display:grid; place-items:center;\">\r\n    <!-- JuicyAds v3.0 -->\r\n<script type=\"text\/javascript\" data-cfasync=\"false\" async src=\"https:\/\/poweredby.jads.co\/js\/jads.js\"><\/script>\r\n<ins id=\"1114307\" data-width=\"908\" data-height=\"258\"><\/ins>\r\n<script type=\"text\/javascript\" data-cfasync=\"false\" async>(adsbyjuicy = window.adsbyjuicy || []).push({'adzone':1114307});<\/script>\r\n<!--JuicyAds END-->\r\n  <\/div>\r\n\r\n  <!-- \u7b2c\u4e8c\u901a\u680f\uff1a728\u00d790 \u901a\u680f -->\r\n  <div style=\"grid-column:1\/-1; 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display:grid; place-items:center;\">\r\n\t<!-- JuicyAds v3.0 -->\r\n<script type=\"text\/javascript\" data-cfasync=\"false\" async src=\"https:\/\/poweredby.jads.co\/js\/jads.js\"><\/script>\r\n<ins id=\"1114302\" data-width=\"133\" data-height=\"139\"><\/ins>\r\n<script type=\"text\/javascript\" data-cfasync=\"false\" async>(adsbyjuicy = window.adsbyjuicy || []).push({'adzone':1114302});<\/script>\r\n<!--JuicyAds END-->\r\n\t<\/div>\r\n    <div style=\"height:125px; background:#91e7ac; display:grid; place-items:center;\">\r\n\t\r\n<!-- JuicyAds v3.0 -->\r\n<script type=\"text\/javascript\" data-cfasync=\"false\" async src=\"https:\/\/poweredby.jads.co\/js\/jads.js\"><\/script>\r\n<ins id=\"1114303\" data-width=\"125\" data-height=\"125\"><\/ins>\r\n<script type=\"text\/javascript\" data-cfasync=\"false\" async>(adsbyjuicy = window.adsbyjuicy || []).push({'adzone':1114303});<\/script>\r\n<!--JuicyAds END-->\r\n\t<\/div>\r\n  <\/div>\r\n\r\n  <!-- \u53f3\u4fa7\u7ad6\u680f\uff1a160\u00d7600 \u6574\u5217\u9ad8\u5e7f\u544a -->\r\n  <div style=\"grid-row:3\/8; height:600px;  display:grid; place-items:center;\">\r\n    <!-- JuicyAds v3.0 -->\r\n<script type=\"text\/javascript\" data-cfasync=\"false\" async src=\"https:\/\/poweredby.jads.co\/js\/jads.js\"><\/script>\r\n<ins id=\"1114301\" data-width=\"160\" data-height=\"600\"><\/ins>\r\n<script type=\"text\/javascript\" data-cfasync=\"false\" async>(adsbyjuicy = window.adsbyjuicy || []).push({'adzone':1114301});<\/script>\r\n<!--JuicyAds END-->\r\n  <\/div>\r\n\r\n<\/div><br \/>\n<br \/> This Newton&#8217;s Cradle Refuses to Quit Thanks to Timed Electromagnetic Kicks<br \/>\n<br \/>#Newtons #Cradle #Refuses #Quit #Timed #Electromagnetic #Kicks<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Newton\u2019s Cradles have long been staples on office desks, their five steel balls transferring motion&#8230;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[8],"tags":[14187,14189,1034,14186,2323,5619,14188],"class_list":["post-17245","post","type-post","status-publish","format-standard","hentry","category-tech","tag-cradle","tag-electromagnetic","tag-kicks","tag-newtons","tag-quit","tag-refuses","tag-timed"],"featured_image_urls":{"full":"","thumbnail":"","medium":"","medium_large":"","large":"","1536x1536":"","2048x2048":"","covernews-slider-full":"","covernews-slider-center":"","covernews-featured":"","covernews-medium":"","covernews-medium-square":""},"author_info":{"display_name":"admin","author_link":"https:\/\/8657085.xyz\/?author=1"},"category_info":"<a href=\"https:\/\/8657085.xyz\/?cat=8\" rel=\"category\">Tech<\/a>","tag_info":"Tech","comment_count":"0","_links":{"self":[{"href":"https:\/\/8657085.xyz\/index.php?rest_route=\/wp\/v2\/posts\/17245","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/8657085.xyz\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/8657085.xyz\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/8657085.xyz\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/8657085.xyz\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=17245"}],"version-history":[{"count":0,"href":"https:\/\/8657085.xyz\/index.php?rest_route=\/wp\/v2\/posts\/17245\/revisions"}],"wp:attachment":[{"href":"https:\/\/8657085.xyz\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=17245"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/8657085.xyz\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=17245"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/8657085.xyz\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=17245"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}