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UM3561 alarm project circuit

Using the UM3561 integrated circuit can be designed various alarm systems using few electronic parts . This UM3561 alarm electronic project require few electronic parts and is powered from a simple 3 volts dc power supply , you can use a single cell 3 volt battery or 2 1.5 volt DC battery .
T1 transistor enables supply to the sound generator IC when the base current starts following trough it .

When the two points A and B are unconnected the alarm circuit is activated and sound will be provided to the speaker.
Sound that will be hear when alarm is active can be selected using some jumper that must be connected between pin 1 and 6 . For more details about how to select police siren, fire engine siren, ambulance siren or machine gun siren please check the following project .

Circuit Diagram: 
UM3561 alarm project circuit diagram electronic project

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