Police Siren simple electronic circuits

R1 ………….. 27K ohm
R2 ………….. 68K ohm
R3 ………….. 56K ohm
R4 ………….. 470 ohm
C1 ………….. 50uF – 12V
C2 ………….. 0,018uF – 25V
TR1 …………. FCS9013
TR2 …………. FCS9012
S1 ………….. Push Switch

Police Siren simple electronic circuits

Police Siren simple electronic circuits

Police Siren simple electronic circuits using FCS9013, FCS9012