ML-01G type automatic music flag raising ceremony dedicated integrated circuit

The picture below is a typical application circuit diagram of ML-01G. The IC in the picture is a 14-pin dual in-line integrated circuit. The pin arrangement and function are briefly described in the table. It is powered by 3V~6V DC power supply. The nominal value of the resistor ROSC in the figure is 270kΩ. Change the size of ROSC appropriately. The rhythm of the IC output electrical signal can be adjusted. The resistance value of resistor R1 is 470Ω, which provides a suitable operating point for the transistor. Capacitor C2 is 104PF. It plays a role in improving the sound quality; C1 is a 220μF electrolytic capacitor, which plays the role of filtering and decoupling. The transistor T1 is a TT-8050 type NPN low-power transistor, which amplifies the micro audio signal output by the IC and drives the speaker to work. S2 is the trigger switch for raising the flag and playing music, and S4 is the button switch for lowering the flag. When raising the flag, press S2. The circuit starts working. Loudspeakers played the national anthem of the People's Republic of China. At the same time, IC pin 9 outputs a positive level signal. The drive motor and variable speed gear drive the flag-raising device to raise the flag synchronously. After the national anthem was played, the national flag just reached the top of the flagpole. When the flag is lowered, S4 is started, and the circuit does not play music at this time. IC pin 8 outputs a positive level signal. Drive the flag-lowering electromechanical device to slowly lower the national flag.