Arduino Tutorial

By LiterallyTheOne

2: 7-segment

Introduction

• Previous tutorial: GPIO
• This tutorial: 7-segment

What is a 7-segment?

• Set of 7 leds + dp
• Show numbers and letters
• a to g + dp

Connect a 7-segment to fixed voltage

Create a number

Store the number

Connect 7-segment to an Arduino

Store our numbers in our code

char digits[10] = {
    0b00111111, // 0
    ...
};

Show digit function

void show_digit(int digit)
{
  for (int i = 0; i < 8; i++)
  {
    digitalWrite(i, (digits[digit] >> i) & 0b0000'0001);
  }
}

Counter

Counter with pause

Counter with pause and reverse

Link to the tutorial and materials