Figure 1 is a circuit diagram. The music integrated circuit IC is usually directly packaged on a small piece (about 22mm × 15mm) of a printed circuit substrate. Five pins are connected to the printed circuit, battery clips, switches, etc. All are installed on the substrate. This is a music integrated circuit assembly composed of a music IC substrate and a piezoelectric buzzer with a sound cavity. It is usually called a music electronic movement. It is mainly used to produce various electronic music cards. .

The power supply voltage of the circuit in Figure 1 is 1.5~3V, and it can be powered by 1 or 2 G13 button batteries.

Switch S is a special displacement switch. There is a plastic sheet sandwiched between the two metal sheets of the switch. One end of the plastic sheet is glued to one side of the paper card. When the greeting card is opened or closed, switch S It will automatically control the power on and off of the music electronic movement. Figure 2 is a physical diagram of the music electronic movement. Steps to make an e-greeting card:

①Choose a three-fold exquisite greeting card (or make it yourself).

② Pull out the plastic isolating gasket in the horizontal direction in Figure 2 and fold the self-adhesive paper pad of the electronic movement 180° along the dotted line (do not fold the plastic sheet together).

③Open the greeting card, align the dotted line of the electronic movement with the folding line in the middle of the card and stick it firmly. When the greeting card is opened, the plastic piece is pulled out horizontally, the switch is turned on, and the buzzer emits music; when it is closed, the plastic piece is pushed in, the switch is turned off, and the music stops immediately. At this time, an exquisite music greeting card is ready.