Musical Doorbell Circuit Diagram

Musical Doorbell Circuit

Musical Doorbell Circuit Diagram

This musical doorbell circuit uses UM3481 A series IC.  It is intended for applications such as toys, door bells, music boxes, melody clock/timers and telephones. The UM3481A is designed to play the melody according to the previously programmed information and is capable of generating 16 songs with 3 instrument effects: piano, organ and mandolin.

Musical Doorbell Circuit Diagram

R1 82kΩ
R2 180kΩ
C1 47pF
C2 2.2µF 16V
Q1 2SC828
LS1 4Ω 0.5W Speaker
PB1 Push to On Switch
IC1 Um3481A, UM3482A or UM3483A

This circuit has very  low stand-by current. C1 and R1 act as the timing components for the built in oscillator. This IC also includes a preamplifier which provides a simple interface to the driver circuit. Q1 is used for driving the speaker.

Um3481A, UM3482A and UM3483A song list

Song List

When you push the PB1 switch, playing one song and it is auto stop.

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