Programa 18

Número aleatório no Arduíno com display 7 segmentos

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#define pinA 10
#define pinB 9
#define pinC 6
#define pinD 7
#define pinE 8
#define pinF 11
#define pinG 12
#define pinPD 5
#define pinBotao 2

int numero = 10;
boolean botaoAtu = false;
boolean botaoAnt = false;

void setup() {
  // put your setup code here, to run once:
  pinMode(pinBotao, INPUT);

  pinMode(pinA, OUTPUT);
  pinMode(pinB, OUTPUT);
  pinMode(pinC, OUTPUT);
  pinMode(pinD, OUTPUT);
  pinMode(pinE, OUTPUT);
  pinMode(pinF, OUTPUT);
  pinMode(pinG, OUTPUT);
  pinMode(pinPD, OUTPUT);

  randomSeed( analogRead(A0) );
}

void loop() {
  // put your main code here, to run repeatedly:
  botaoAtu = digitalRead(pinBotao);

  if (botaoAtu && !botaoAnt) {
     numero = random(10);
  }
  botaoAnt = botaoAtu;

  switch (numero) {
      case 0:
        digitalWrite(pinA, HIGH);
        digitalWrite(pinB, HIGH);
        digitalWrite(pinC, HIGH);
        digitalWrite(pinD, HIGH);
        digitalWrite(pinE, HIGH);
        digitalWrite(pinF, HIGH);
        digitalWrite(pinG, LOW);
        digitalWrite(pinPD, LOW);
        break;

      case 1:
        digitalWrite(pinA, LOW);
        digitalWrite(pinB, HIGH);
        digitalWrite(pinC, HIGH);
        digitalWrite(pinD, LOW);
        digitalWrite(pinE, LOW);
        digitalWrite(pinF, LOW);
        digitalWrite(pinG, LOW);
        digitalWrite(pinPD, LOW);
        break;

      case 2:
        digitalWrite(pinA, HIGH);
        digitalWrite(pinB, HIGH);
        digitalWrite(pinC, LOW);
        digitalWrite(pinD, HIGH);
        digitalWrite(pinE, HIGH);
        digitalWrite(pinF, LOW);
        digitalWrite(pinG, HIGH);
        digitalWrite(pinPD, LOW);
        break;

      case 3:
        digitalWrite(pinA, HIGH);
        digitalWrite(pinB, HIGH);
        digitalWrite(pinC, HIGH);
        digitalWrite(pinD, HIGH);
        digitalWrite(pinE, LOW);
        digitalWrite(pinF, LOW);
        digitalWrite(pinG, HIGH);
        digitalWrite(pinPD, LOW);
        break;

      case 4:
        digitalWrite(pinA, LOW);
        digitalWrite(pinB, HIGH);
        digitalWrite(pinC, HIGH);
        digitalWrite(pinD, LOW);
        digitalWrite(pinE, LOW);
        digitalWrite(pinF, HIGH);
        digitalWrite(pinG, HIGH);
        digitalWrite(pinPD, LOW);
        break;

      case 5:
        digitalWrite(pinA, HIGH);
        digitalWrite(pinB, LOW);
        digitalWrite(pinC, HIGH);
        digitalWrite(pinD, HIGH);
        digitalWrite(pinE, LOW);
        digitalWrite(pinF, HIGH);
        digitalWrite(pinG, HIGH);
        digitalWrite(pinPD, LOW);
        break;

      case 6:
        digitalWrite(pinA, HIGH);
        digitalWrite(pinB, LOW);
        digitalWrite(pinC, HIGH);
        digitalWrite(pinD, HIGH);
        digitalWrite(pinE, HIGH);
        digitalWrite(pinF, HIGH);
        digitalWrite(pinG, HIGH);
        digitalWrite(pinPD, LOW);
        break;

      case 7:
        digitalWrite(pinA, HIGH);
        digitalWrite(pinB, HIGH);
        digitalWrite(pinC, HIGH);
        digitalWrite(pinD, LOW);
        digitalWrite(pinE, LOW);
        digitalWrite(pinF, LOW);
        digitalWrite(pinG, LOW);
        digitalWrite(pinPD, LOW);
        break;

      case 8:
        digitalWrite(pinA, HIGH);
        digitalWrite(pinB, HIGH);
        digitalWrite(pinC, HIGH);
        digitalWrite(pinD, HIGH);
        digitalWrite(pinE, HIGH);
        digitalWrite(pinF, HIGH);
        digitalWrite(pinG, HIGH);
        digitalWrite(pinPD, LOW);
        break;

      case 9:
        digitalWrite(pinA, HIGH);
        digitalWrite(pinB, HIGH);
        digitalWrite(pinC, HIGH);
        digitalWrite(pinD, HIGH);
        digitalWrite(pinE, LOW);
        digitalWrite(pinF, HIGH);
        digitalWrite(pinG, HIGH);
        digitalWrite(pinPD, LOW);
        break;

      default:
        digitalWrite(pinA, LOW);
        digitalWrite(pinB, LOW);
        digitalWrite(pinC, LOW);
        digitalWrite(pinD, LOW);
        digitalWrite(pinE, LOW);
        digitalWrite(pinF, LOW);
        digitalWrite(pinG, LOW);
        digitalWrite(pinPD, HIGH);
        break;
 
  }

  delay(10);
}

Créditos para:  https://cursodearduino.net/