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Vacation with Nani Maa (Smart GPS & Ultrasonic Travel Meter)

Source:

Map Nani Maa's holiday journey on a mini Indian map board equipped with HC-SR04 ultrasonic distance sensors. Move a toy bus along route paths to measure real distances in centimeters and scale them to kilometers (1 cm = 10 km).

Categorisation

Props & Materials Required

  • •Mini Indian map board with town markers (Delhi, Jaipur, Agra, Mumbai)
  • •Toy bus with ultrasonic sensor reflector target
  • •HC-SR04 ultrasonic distance sensor
  • •ESP32 controller board with 16x2 LCD display
  • •DFPlayer Mini MP3 module + 3W speaker

Step-by-Step Instructions

1

Select Travel Route

Plan Nani Maa's trip: 'Travel from Delhi to Jaipur, then Jaipur to Agra'.

2

Drive Toy Bus along Map Route

Move toy bus along the map track. The ultrasonic sensor measures the bus position.

3

Read Distance & Map Scale

Ultrasonic sensor reads 26 cm on map. Controller multiplies by scale (x10). LCD displays: 'Map Distance: 26 cm = Real Distance: 260 Kilometers!'

4

Travel Time Calculator

Press 'Time' button. Speaker calculates: 'At 50 km/h speed, Nani Maa's bus ride will take 5 hours! Pack snacks!'

Why It Works & Notes

Distance concepts (Meters vs. Kilometers) become real when planning travel routes. Ultrasonic sensors measuring physical distance on a map board and converting it using scale factors (1 cm = 10 km) connects measurement with map reading.