Abstract:
This paper presents a solution for the design
of a multifunctional siren for emergency services (police,
ambulance, special services etc). Such a device should
have two functionalities: both as a voice amplifier and as
a tone generator. When designing such a circuit, a D
class amplifier has been considered for the amplification
and a PIC microcontroller for the tone generation. A
switch should be used to interchange these
functionalities and user buttons must be provided for
configuring the tone libraries.