Pay in 4 interest-free payments of $3.00 Learn more
Ships within 48 hours · Estimated delivery Aug 9 - Aug 14
The mechanical butterfly is a very interesting kit
DIY kit LM1875
Connect your own speaker and audio input to power amplifier PCB screw terminals
the remote control main body accessories board
and help children experience the theory of power
DIY Electromagnetic Swing STEM Kit - Kids Wooden Toys Science Experiment Technology Electromagnetic Swing STEM Educational Puzzle science The mechanical butterfly is aExperimental principle: The principle of electromagnetic swing: After the wire is energized, a magnetic field will be generated around the wire. If the wire is wound into a coil, this magnetism will be increased. In this experiment, the copper wire has a layer of insulating film, which produces magnetism after being wound into a coil and energized. The more turns of the coil, the stronger the magnetism. The coil interacts with the permanent magnet
