¿Cómo hacer un altavoz (bocina) casero? ¡¡Para principiantes!!

Today we're going to build a homemade speaker. For our speaker, we need a plastic lid, neodymium magnets, acetate, paper, and magnet wire or enameled wire. Why does this speaker work? Basically, a speaker consists of two magnets that attract and repel each other. One of these magnets is a permanent magnet, and the other is an electromagnet—that is, a coil that acquires magnetic properties when an electric current is applied. The permanent magnet is fixed to the casing, while the electromagnet hangs freely, held by a diaphragm. Then, when we apply an audio signal to the electromagnet, it begins to vibrate in time with the audio signal thanks to the magnetic forces that attract and repel it. And these vibrations produce the sound we hear. In our case, the casing is the plastic lid, the permanent magnets are the neodymium magnets, the diaphragm is the acetate, and the electromagnet is the coiled wire hanging freely, held by the acetate.