Sound Generator IC UM3561 alarm
This scheme is very simple and easy to do. The IC produces all the sound effects, the output on pin 3 is amplified by the transistor. A speaker 8 ohms between resistance of 56 ohms and more, A switch routes from February to April, control the effects sound. Position 1 (as drawn) being a police siren, position 2 is a sound fire truck, an ambulance and 3 is the 4 position is a result of gun. CI UM 3561 the electronic component's visible on the electronic diagram
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