Solar Magnetic Levitation ,mendocino motor,education model stirling steam engine
The motor runs dry.
The motor will start and after a while stop. Due to increse friction on the pivot point when rotating.2 drops of oil will do he trick. It will run for eternity (or as long as the sun shines)
ATOM KINETIC MOBILE SWINGING PENDULUM desktop toy gadget novelty gift adult
Something is not there.
There sould have been an on-off switch,none present. So it will run till the battery is empty. 9v battery is not cheap. As an extra there should also be a DC-plug for 9V adapter. I've installed it all. Not so difficult. Now it runs 7/24.
10pcs Waterproof Cover Guard Protector for 16mm Dia Push Button Switch
Will stop me from hitting the reset button by misstake on my 3D printer.Very good.