555 Timer Interface with Arduino

/*
In this code, the trigger pin of the 555 timer is connected to digital output pin 2 of the Arduino board, and the output pin of the 555 timer is connected to digital input pin 3 of the Arduino board.

The code generates a 1-second pulse on the trigger pin of the 555 timer using the digitalWrite() function and the delay() function. It then reads the state of the output pin of the 555 timer using the digitalRead() function and prints the output state to the serial monitor using the Serial object.

Note that the specific pin mappings and timing parameters may vary depending on your particular implementation of the 555 timer. You should consult the datasheet or reference material for your specific 555 timer to determine the appropriate pin connections and timing parameters.
*/

const int TRIGGER_PIN = 2; // Trigger pin of 555 timer
const int OUTPUT_PIN = 3; // Output pin of 555 timer

void setup() {
  pinMode(TRIGGER_PIN, OUTPUT);
  pinMode(OUTPUT_PIN, INPUT);
  Serial.begin(9600);
}

void loop() {
  // Generate a 1-second pulse on the trigger pin
  digitalWrite(TRIGGER_PIN, HIGH);
  delay(1000);
  digitalWrite(TRIGGER_PIN, LOW);

  // Read the output pin of the 555 timer
  int outputState = digitalRead(OUTPUT_PIN);

  // Print output state to serial monitor
  Serial.println(outputState);

  delay(100);
}