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Community Helpers Emergency Siren & Telegraph Station

Source:

Build a dual emergency beacon (Ambulance / Police / Fire) with flashing red/blue LEDs, a loud siren buzzer module, and a Morse code telegraph key for sending emergency messages.

Categorisation

Props & Materials Required

  • •Cardboard emergency vehicle model (Ambulance, Fire Engine, Police Car)
  • •Red & Blue 10mm high-brightness LEDs
  • •Loud piezo buzzer / siren sound module
  • •Telegraph key / brass contact lever switch
  • •ESP32 / Arduino controller

Step-by-Step Instructions

1

Select Emergency Helper

Switch mode to 'Police', 'Fire', or 'Ambulance'.

2

Activate Emergency Beacon

Press the emergency button. Red and blue LEDs flash alternately at high frequency while the dual-tone siren wails!

3

Send Morse Code Message

Tap the brass telegraph key to send short (dot) and long (dash) sound beeps. Send S-O-S (... --- ...)!

4

Helper Role-Play Quiz

Speaker plays emergency scenario sound: 'A cat is stuck up a high tree!' Child selects Firefighter beacon → Green confirmation!

Why It Works & Notes

Community helpers use specialized signaling tech (sirens, flashing beacons, radio codes) to alert citizens during emergencies. Building a telegraph circuit introduces early telecommunication history.