Circuit Blox 11S - Emergency Fire Siren

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48. Emergency Fire Siren

Build the circuit above. Press the switch (62) and a siren sound should come from the speaker (93). When you hold the

press switch (61) you will hear a re engine siren. A siren like this is designed by an engineer to cover a large spectrum

of sound so all people can hear it, even if they have hearing problems.

1st level

2nd level