KD9561 Four-tone Alarm Sounds Melody Generator Chip

kD9561 CK9561 Four-tone alarm sound chip music IC music integrated block

There are four kinds of alarm sounds, in fact only three are used, namely 110** alarm sound, 119 fire alarm sound, 120 medical rescue sound, and the other machine gun sound is mainly used for toy guns.

Sound effect selection sound termination method

SEL1/K1 -  SEL2/K2

Connection type:

Alarm whistle : SEL1=NC - SEL2=NC

Fire alarm : SEL1=VCC - SEL2=NC

Ambulance voice :SEL1=GND - SEL2=NC

Machine guns sound: SEL1=NC - SEL2=VCC