DIY磁悬浮玩具的做法2

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1、NEWLOWERPRICED,REVISEDKITHASADJUSTABLECONTROLThissimpleelectronickitusesmagneticlevitationtosuspendsmallobjectsuptoabout1/2ounce(15Grams)orsoinmidair. ThisisanidealScienceProjectforages12andup! Detailed6pageinstructionsincludetheoryandclearimages. Seebelowt

2、oordereitherthecompletekitofparts,orfullyassembledandtestedversions.Theairgapisabout3/8". Theelectromagnetstabilizesthepositionofthesuspendedrareearthmagnet(s)attachedtothelevitatedobject. FeedbackisprovidedbyalinearHallEffectsensormountedundertheelectromag

3、net. Oncecalibratedproperlyusingthecircuitboardmountedcontrolknob,suspendedobjectsarestableaftersettling. Theknobiscanbeusedtoadjusttheairgapbyabout1/4".NOTE! Iamoftenaskedifthedesigncanbemodifiedtoliftmoreweight,orifthegapcanbeincreased. TheanswerisNO. The

4、reareinherentlimitationsduetothesizeoftheelectromagnetandhowquicklyitsfieldcanbeswitched. Themostweightthatcanbeliftedwiththistypeofdesignisabout1ounce(30grams). Theairgapcanbeextendedupto1/2"(13mm)dependingonweight.Gettinganobjectinplaceisrelativelyeasy.It

5、isaneeriefeelingwhenyouoffertheitemuptothe"sweetspot"asthecontrols"grab"themagnet-pullingitslightlyintoposition. Itfeelslikesomekindofsciencefictionforcefield.  Objectssetspinningwillcontinuetospinforseveralminutes!Ifyoudon'tseeavideoclipabove,thenclickhere

6、toseeitonYouTube.Thekitassuppliedhasalimitedrangeofweightthatitcanliftwhichisnomorethan.5ounceincludingthemagnets. Itemslikeapingpongballwouldbetoolight,andextraweightwouldneedtobeaddedinsidelikemoremagnetsorsmallwashers. Thedesignrequiresthatthemagnetbeatt

7、hetopofthesuspendedobjecttokeepthemagnetfromflippingover.Ifpoweristurnedoff--themagnetwilldropaway. Returningittopositiontakesalittlepractice--ifyoumissthe"sweetspot"themagnetwillgoupandsticktotheelectromagnetaboveit.SECUREON-LINEORDERINGSECUREONLINEORDERIN

8、G:Orderthekitusingyourcreditcard,PayPalaccount,oreCHECK.MAILORDER:Clickheretodownloadmyorderform,andmailitwithyourMoneyOrderorbankcheck.SHIPPING:IshipviaUSPSPriorityMailinUnitedStatesfordeliveryin1-3da