可変抵抗器でLEDの点滅パターンを選択するArduinoスケッチ

pot-select.ino

// for Raspberry Pi Pico

void setup() {
}

int tick = 0;
const unsigned char pattern3[8] = {255, 0, 255, 0, 255, 127, 63, 31};

void loop() {
  int v = analogRead(A0);
  int sel = v * 3 / 1024; // sel: 0 ～ 2

  switch (sel) {
  case 0:
    if (tick < 500) {
      analogWrite(25, tick / 2);
    } else {
      analogWrite(25, 250 - (tick - 500) / 2);
    }
    break;
  case 1:
    analogWrite(25, (tick < 500) * 255);
    break;
  case 2:
    analogWrite(25, pattern3[tick / 125]);
    break;
  }

  tick = (tick + 1) % 1000;
  delay(2);
}