How To Make a Powerful Siren ( Skeleton Circuit)

Making simple alarm siren using only transistors,resistors and capacitors without chips.
Schematic described in video,find it and take a screenshot.
Parts usd for this project:
-Transistors 2xBC557 and BC337
-Resistors 2x1k;2x10k;220ohm;220k;22k;100k
-capacitors 2x22mf;10nf;47mf
-push switch
-8ohms speaker

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