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Fair Share (Smart Fraction & Equal Division Wheel)

Source:

Divide wooden Roti/Pizza slices among 2, 3, or 4 friends using a rotary encoder wheel. The smart display shows exact fraction notation (1/2, 1/3, 1/4) and narrates remainders when sharing cannot be equal.

Categorisation

Props & Materials Required

  • •Wooden fraction pizza/roti set (Halves, Thirds, Quarters)
  • •NFC tags on each fraction slice
  • •Rotary encoder slice angle sensor
  • •ESP32 controller board
  • •0.96-inch OLED display
  • •DFPlayer Mini MP3 module + 3W speaker

Step-by-Step Instructions

1

Explore Fraction Slices

Pick a half-pizza slice (1/2) and tap it on the reader. Speaker: 'ONE-HALF! 2 of these make a whole pizza!'

2

Tap Quarter Slices

Tap a quarter slice (1/4). OLED displays '1/4'. Light 4 LEDs to build 1 whole pizza.

3

Division with Remainder Scenario

Share 7 slices among 3 friends. Set friends = 3. Drop 7 slices.

4

Remainder Announcement

Speaker narrates: '7 divided by 3: Each friend gets 2 slices! 1 slice is left over (Remainder = 1)!'

Why It Works & Notes

Fractions and division remainders are concrete when sharing food. Tapping 1 slice of a 4-piece pizza on the smart reader displays '1/4 (One-Fourth)', while sharing 7 slices among 3 friends announces '2 slices each, Remainder = 1!'.