Model Police Car Siren circuit using 9013, 9012

Model Police Car Siren circuit

Model Police Car Siren circuit

R1 ………….. 6,8K ohm
R2 ………….. 2,2K ohm
R3 ………….. 100K ohm
R4 ………….. 15K ohm
R5 ………….. 1K ohm
R6 ………….. 470 ohm
VR ………….. 1K ohm
C1 ………….. 4,7uF – 10V
C2 ………….. 0,068uF – 25V
TR1 …………. P.U.T. MEU – 21
TR2 …………. FCS – 9013
TR3 …………. FCS – 9012
SP ………….. Speaker 25 ohm
Batery ………. 9v