Abstract: The electronic music box is a musical instrument different from the traditional mechanical music box. It uses electricity as energy and plays music through circuit equipment. Compared with the traditional wind-up music box, the electronic music box can play a complete track, but the timbre is inferior, and it can't simulate the warp speed from fast to slow, with obvious advantages and disadvantages. The electronic music box is made mainly by using the music score to determine the frequency that the 555 oscillation circuit should produce, and then to make notes. Let's learn about the electronic music box. I. What are the advantages and disadvantages of electronic music boxes?

Music boxes can be divided into mechanical and electronic types according to pronunciation devices, in which the mechanical type plays music with the energy of clockwork, which is also the basic music box. With the innovation of music box technology, electronic music boxes have also appeared. How about electronic music boxes?

1. Advantages of the electronic music box

The advantage of the electronic music box is that it is not limited by the length of music like the mechanical music box. The traditional mechanical music box usually takes into account the limited energy provided by the clockwork and condenses a song to about 2 seconds, while the electronic music box is driven by electricity, so there is no need to worry about energy, so it can generally play the whole song completely.

2. Disadvantages of the electronic music box

The disadvantage of the electronic music box lies in the timbre and playing music. Because the electronic music box is played with a loudspeaker, it can't simulate the ethereal timbre when the metal comb teeth are plucked; In addition, the mechanical music box will change the warp speed according to the tightness of the spring, which is generally from fast to slow, which is very distinctive, and the electronic music box can't do this effect.

Generally speaking, the electronic music box has both advantages and disadvantages, and it is also good to be used as a music player at home.

second, the design and manufacture of electronic music box

The traditional music box mainly uses the protrusions on the copper sheet to determine which timbre the reed vibrates, while the electronic music box can also use the music score to determine the frequency that the 555 oscillation circuit should generate, thus emitting a note. This design is not complicated, and the specific methods are as follows:

1. Select a perforated piece of paper to control the note selection. On the paper, the contacts made of copper wire and the copper sheet below are used to read the notes. There are 13 resistance networks under the 13 contacts. When different contacts touch, the resistance of the whole resistance network changes.

2. After changing the resistance value of the resistor network, the oscillation frequency of the circuit will be 555, so that corresponding notes will be issued. When the two contacts touch each other, the oscillator will be able to issue corresponding sounds, and the electronic music box will be able to play corresponding tracks.