This circuit describe here will generate different sounds when your guest presses the door bell . This circuit is based on a melody generator IC M3482 which can generate 12 different kinds of songs. M3482 is a mask ROM and has inbuilt multi instrument melody generator. This IC is implemented using CMOS technology and designed to play songs according to the previously programmed information. M3482 IC can be operated with just 1.5V power supply and also have very low stand by current which lead to longer battery life. And it also have on chip envelop modulator and pre amplifier.This IC can also be used in different application like in toys, music box, timer and telephones circuits for producing different tones. Continue reading to know how the circuit is assembled and how it is made to work.