The circuit working principle of the running water lamp music box uses the integrated circuit NE555 as the core device to form a self-excited multivibrator. According to the query of relevant information, the running water lamp circuit consists of a clock generation circuit and a functional display circuit. The integrated circuit NE555 is used as the core device to form a self-excited multivibrator. When the power switch S is closed, the power supply passes through the resistors R1 and R2 Charge capacitor C1.