Police siren circuit using BC547, 555
Police siren circuit using BC547, 555
IC1 555
RV1 1MΩ
Q1 BC547
Q2 BC547
R2 1K Ω
R3 1K Ω
R5 330 Ω
R6 680 Ω
R7 680 Ω
RV2 50K Ω
RV3 50K Ω
C1 33 µF
C2 10 µF
C3 1 µF
C3 1 µF
C4 1 µF
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