Equal Groups (Smart Array Matrix & Long Division Machine)
Source:
Build multiplication arrays and perform long division (e.g. 48 ÷ 4 = 12) on a smart 10x10 LED grid. The system demonstrates division as inverse multiplication, displaying quotients and remainders.
Categorisation
Props & Materials Required
- •10x10 NeoPixel RGB LED matrix grid board
- •4x4 membrane keypad module
- •ESP32 controller board
- •0.96-inch OLED display screen
- •DFPlayer Mini MP3 module + 3W speaker
Step-by-Step Instructions
1
Input Division Problem
Key in '48 ÷ 6' on the matrix keypad.
2
Watch 48 LEDs Light Up
48 NeoPixel LEDs light up on the 10x10 grid matrix board.
3
Array Division Grouping
The 48 LEDs automatically separate into 6 distinct color columns of 8 LEDs each!
4
Quotient & Inverse Proof Audio
Display shows 'Quotient = 8, Remainder = 0'. Speaker: '48 divided into 6 equal groups gives 8 per group! Because 6 times 8 is 48!'
Why It Works & Notes
Multiplication and Division are inverse operations (6 × 8 = 48 ↔ 48 ÷ 6 = 8). Illuminating a 48-LED array on a grid and splitting it into 6 equal groups of 8 LEDs visually proves division.