--- title: The World’s Smallest Marble Clock With Pick And Place Arm description: A maker named Jens built a miniature marble clock using a pick-and-place robotic arm to position marbles into readable digit formations. Unlike large marble... canonical: https://daily.dev/posts/the-world-s-smallest-marble-clock-with-pick-and-place-arm-gaj3fkl5w twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: The World’s Smallest Marble Clock With Pick And Place Arm | daily.dev og:description: A maker named Jens built a miniature marble clock using a pick-and-place robotic arm to position marbles into readable digit formations. Unlike large marble... og:url: https://daily.dev/posts/the-world-s-smallest-marble-clock-with-pick-and-place-arm-gaj3fkl5w og:image: https://api.daily.dev/og/posts/GaJ3fKL5w.png og:image:alt: The World’s Smallest Marble Clock With Pick And Place Arm og:image:width: 1200 og:image:height: 630 og:locale: en --- > ## Documentation Index > Fetch the complete documentation index at: https://daily.dev/llms.txt > Use this file to discover all available pages before exploring further. # The World’s Smallest Marble Clock With Pick And Place Arm **[Hackaday](https://daily.dev/sources/hackaday)** · 2 min read · 0 upvotes · 0 comments ## Summary A maker named Jens built a miniature marble clock using a pick-and-place robotic arm to position marbles into readable digit formations. Unlike large marble clocks that rely on rolling and gravity tracks, this design uses cheap SG90 micro servos and a permanent magnet mechanism to pick and place marbles quietly. The total build cost is under $23, making it an affordable and compact alternative to desk-sized marble clocks, though the arm briefly obscures the display while moving. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Similar posts on daily.dev - [Interplanetary Clock Keeps Time Across The Solar System](https://daily.dev/posts/interplanetary-clock-keeps-time-across-the-solar-system-rfpojnz9n) · Hackaday · 0 upvotes · 0 comments - [3D Printed Clock Just Taps It In](https://daily.dev/posts/3d-printed-clock-just-taps-it-in-i0zxooszu) · Hackaday · 0 upvotes · 0 comments - [The WalMart Atomic Clock](https://daily.dev/posts/the-walmart-atomic-clock-mh9d3z3u0) · Hackaday · 0 upvotes · 0 comments - [Silicon Clock Challenges Atomic Timekeeping Norms](https://daily.dev/posts/silicon-clock-challenges-atomic-timekeeping-norms-igjkabsh9) · IEEE Spectrum · 0 upvotes · 0 comments --- Tags: [#embedded](https://daily.dev/tags/embedded), [#hardware](https://daily.dev/tags/hardware), [#robotics](https://daily.dev/tags/robotics) [View this post on daily.dev](https://daily.dev/posts/the-world-s-smallest-marble-clock-with-pick-and-place-arm-gaj3fkl5w) ```json {"@context":"https://schema.org","@graph":[{"@type":"Organization","@id":"https://daily.dev/#organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180},"sameAs":["https://twitter.com/dailydotdev","https://github.com/dailydotdev","https://www.linkedin.com/company/daily-dev-ltd"]},{"@type":"WebSite","@id":"https://daily.dev/#website","url":"https://daily.dev","name":"daily.dev","publisher":{"@id":"https://daily.dev/#organization"},"potentialAction":{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https://daily.dev/search?q={search_term_string}"},"query-input":"required name=search_term_string"}}]} {"@context":"https://schema.org","@type":"TechArticle","headline":"The World’s Smallest Marble Clock With Pick And Place Arm","url":"https://daily.dev/posts/the-world-s-smallest-marble-clock-with-pick-and-place-arm-gaj3fkl5w","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/the-world-s-smallest-marble-clock-with-pick-and-place-arm-gaj3fkl5w"},"datePublished":"2026-03-06T21:30:07.225Z","dateModified":"2026-03-15T03:50:16.489Z","description":"A maker named Jens built a miniature marble clock using a pick-and-place robotic arm to position marbles into readable digit formations. 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