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Siren Sound Generator circuit diagram

Abstract: internal circuit of UM3561 siren police diagram UM3561A circuit diagram of police siren UM3561 3 machine gun sound generator police siren block diagram Siren Sound Generator 5 police Siren Sound
Text: UM3561A Three Siren Sound Generator Features A magnetic speaker can be driven by connecting an NPN transistor Power on reset • Four sounds can be selected ■ Typical 3V operating voltage * RC oscillator with an external resistor General Description The UM3561A is a low-cost, low-power CMOS LSI designed