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Data Handling (Smart Interactive Poll & Bar Graph Box)

Source:

Children cast votes for their favorite fruit (Apple, Banana, Mango, Orange) by pressing colored Arcade buttons on a voting box. Live NeoPixel bar columns grow upward while speaker summarizes class survey data.

Categorisation

Props & Materials Required

  • •Cardboard voting box housing
  • •4 large colorful arcade push buttons (Red, Yellow, Orange, Green)
  • •ESP32 / Arduino controller
  • •4x NeoPixel LED vertical bar strips (8 LEDs each)
  • •DFPlayer Mini MP3 module + 3W speaker
  • •0.96-inch OLED display

Step-by-Step Instructions

1

Conduct Class Survey

Ask classmates: 'What is your favorite fruit?' Each student presses their fruit button on the voting box.

2

Watch Bar Columns Grow

Pressing the Yellow button for Mango lights up 1 more LED in the Mango column. OLED shows vote counts.

3

Analyze Results

Press the 'Results' button. Speaker announces: 'Total votes: 15! MANGO wins with 7 votes! BANANA came second with 5 votes!'

4

Draw the Pictograph

Child copies the exact LED bar graph numbers onto their notebook picture tally chart.

Why It Works & Notes

Data handling is abstract when drawn on paper, but energetic when children cast physical votes. Watching LED bar columns grow dynamically makes frequency distribution and mode (highest bar) crystal clear.