{"product_id":"magnetic-levitation-kit","title":"Magnetic Levitation Kit – DIY Floating Ball with Electromagnet \u0026 Light, STEM Model","description":"\u003ch3\u003eMake a ball float in the air\u003c\/h3\u003e\u003cp\u003eThis kit builds a magnetic levitation display. A coil in the top housing works as an electromagnet, and a control circuit keeps adjusting its pull so it exactly balances the weight of the orange ball. Set the ball in the right spot about 1–3 cm below the housing, let go, and it hangs in mid-air while the base lights up; slide a sheet of paper between them to prove nothing is touching.\u003c\/p\u003e\u003ch3\u003eScience it demonstrates\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eElectromagnets: a coil carrying current becomes a magnet\u003c\/li\u003e\n\u003cli\u003eMagnetic force against gravity\u003c\/li\u003e\n\u003cli\u003eFeedback control: how the circuit keeps the ball stable\u003c\/li\u003e\n\u003cli\u003eReal-world maglev: trains and frictionless bearings\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eWhat you'll do\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eAssemble the base, battery box and curved support\u003c\/li\u003e\n\u003cli\u003eFit the coil and control board into the top housing\u003c\/li\u003e\n\u003cli\u003eInstall the batteries and switch on\u003c\/li\u003e\n\u003cli\u003eFind the balance point and let the ball float\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eParts list\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eBase with battery box, switch, light and decorative ring\u003c\/li\u003e\n\u003cli\u003eCurved support and coil housing with control board\u003c\/li\u003e\n\u003cli\u003eOrange ball with magnet\u003c\/li\u003e\n\u003cli\u003eScrews and a screwdriver\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eGood to know\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eNeeds 4 × AA batteries (not included).\u003c\/li\u003e\n\u003cli\u003eFinding the floating point takes a little patience: move the ball slowly.\u003c\/li\u003e\n\u003cli\u003eContains small parts. Recommended for ages 8 and up, with adult guidance.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"RetroMakerKits by innoelement","offers":[{"title":"Default Title","offer_id":67749092294739,"sku":null,"price":28.75,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0710\/0891\/1443\/files\/01_f97ec958-8405-4c12-8a63-355dc065bc84.jpg?v=1792429624","url":"https:\/\/www.retromakerkits.com\/products\/magnetic-levitation-kit","provider":"RetroMakerKits by innoelement","version":"1.0","type":"link"}