Pendulum

Electric swing is a good gift for a child, and with a good build you can develop an idea up to, for example, an office souvenir.
The basis of the toy is a simple overhanging scheme (although of course it’s better to do it on the board) consisting of a transistor , a diode and a specially wound coil, hidden in the bottom. The "seat" swing is a magnet, it is better to choose neodymium, there are plenty of them now, although the usual one is fine. &Nbsp;
Thecoiliswoundwithadoublewiresectionofabout0.25-0.3each,about1500turns,ie2aretakeninparallelcopperwiresanddangleonthecoil.Thediagramshowsthattheendofthefirstwireconnectstothebeginningofthesecond.Thecoilshapeisoval,becausethemagnetpassingoveritwillinteractbetteralongthelengthofthelargerdiagonaloftheellipseThecorehasnotbeenused,soyoucanexperimentwithit.Youshouldbetterwrapitcarefully,turntoturn,butnotnecessarily.&Nbsp;
Thedirectconductiontransistor,youcantakeMP39...42,anydiode,thebatteryisanormal1.5volt.Forconvenience,itisbettertomakeaswitch.
Iapologizefortheartisanalassembly,butIdiditinmyschoolyearsontheenthusiasmoftheoldfather'snotebookwithdiagrams,soit’snotknown,whereitcamefrom,andIjustwantedtoseehowitworksassoonaspossible.
Runssimply,turnonthedeviceandpushthemagnet,afteracoupleofsecondsyouwillnoticehowintensivelythependulumwillbegintooscillate.Thesystemwillworkbetterifitispossibletocreatearesonance,i.e.theequalityofthefrequenciesofthecircuitandthenaturalfrequencyofthependulum,whichiscalculatedbytheformula.Hereitisachievedbyfittingalltheparametersofthependulum.Fixtheconnectingrodbetteron2bearings,andnotonthe1stlikemine.
Then everything depends on your imagination and skillful hands, go for it! Unsubscribe in the comments, can have similar schemes.


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