556 Timer (Dual 555) Siren Oscillator @vinesthemonkey
556 Timer (Dual 555) Siren Oscillator  @vinesthemonkey
Uploaded October 2025 | Updated September 2026, 1 week ago
The first timer as a low frequency oscillator (LFO) modifies the RC circuit of the second, which produces the audible tone.
Schematic: electronic-projects.50webs.com/555-based-siren-circuit.htm
R2 is a 1M pot and R5 is a 10k pot.
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556 Timer (Dual 555) "Siren" Oscillator

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