Four Tone Siren

UM3561 PROJECT CIRCUIT

        UM3561 IC includes  oscillator and selector circuits so few external component is used for construction of four tone siren.
   The UM3561 contains programmed mask ROM to simulate siren sound. Power consumption of IC is low.It is powered by 3 Volt. One NPN Transistor is used for amplification of audio signal.

       Circuit Diagram of Four Tone Siren
Part List :
IC UM3561
Resistance = 220 Ohms
Condenser 100Mfd
Transistor BC548
Battery Container 3V
Switches