We need: a piece of cardboard, double-sided tape, a motor from a beaten CD drive, glue, clerical gum, a cup, a spoon. You will also need a connector to connect the power supply. The main part of our device is neodymium magnets. The size of the magnets must be selected so that they are well attracted through the table.
We take out the motor from the CD drive and solder the connector.
Cut out the main parts from cardboard.
From the obtained parts we assemble such a design. White squares are double-sided tape. Glue a neodymium magnet on a large circle.
We install the device under the table.
Most cutlery is made of non-magnetic material, so a small neodymium magnet is glued to a spoon.
We put the cup on the table above our device. Put a spoon in it. Turn on our poltergeister and watch how the spoon itself interferes with it. If the device makes too much noise, it can be covered with foam rubber glued with adhesive tape.
By the way, this thing can be improved and you get a completely crazy mixer for coffee. To do this, it would be nice to make a button, and even better to install a Hall sensor, sensitive to the polarity of the magnetic field. Then the device will turn on itself after we place the spoon in the cup. A neodymium magnet can be more integrated into a spoon, for example: cut a rectangular hole with a dremel and press in (it is better to take a rectangular magnet, it will be better to hold).
By the way, on the basis of magnets you can come up with a bunch of other tricks. For example, there are the most powerful neodymium magnets on sale, they are sometimes called search magnets. The size of an apple. Such a magnet can be made to crawl a pan over the wall.Well, if you assemble a powerful electromagnet and connect it through the amplifier to the music center, you can force the irons and cutlery to dance through the wall with an alternating magnetic field under Ramstein.
