Circuit Documentation

Summary of the Circuit

This circuit consists of an Arduino UNO microcontroller board interfaced with a two-pin red LED. The purpose of the circuit is to blink the LED on and off at a regular interval of one second. The LED's anode is connected to a digital output pin (D13) on the Arduino UNO, and the cathode is connected to the ground (GND) pin on the Arduino UNO. The Arduino UNO is programmed to toggle the D13 pin between high and low states, causing the LED to turn on and off.

Component List

LED: Two Pin (red)

• Description: A basic red LED with two pins: anode and cathode.
• Pins:
  • Cathode
  • Anode
• Purpose: To visually indicate the output state of the Arduino UNO's digital pin (D13) by blinking.

Arduino UNO

• Description: A microcontroller board based on the ATmega328P.
• Pins:
  • UNUSED
  • IOREF
  • Reset
  • 3.3V
  • 5V
  • GND
  • Vin
  • A0 to A5 (Analog input pins)
  • SCL
  • SDA
  • AREF
  • D0 to D13 (Digital I/O pins)
• Purpose: To control the blinking of the LED by toggling the D13 pin.

Wiring Details

LED: Two Pin (red)

• Cathode: Connected to the GND pin on the Arduino UNO.
• Anode: Connected to the D13 pin on the Arduino UNO.

Arduino UNO

• GND: Connected to the cathode of the LED.
• D13: Connected to the anode of the LED.

Documented Code

Arduino UNO Code

/*
 * Arduino UNO interfacing with LED
 * This sketch will blink an LED connected to pin D13 of the Arduino UNO.
 */

void setup() {
  // Initialize the digital pin D13 as an output.
  pinMode(13, OUTPUT);
}

void loop() {
  // Turn the LED on (HIGH is the voltage level)
  digitalWrite(13, HIGH);
  // Wait for a second
  delay(1000);
  // Turn the LED off by making the voltage LOW
  digitalWrite(13, LOW);
  // Wait for a second
  delay(1000);
}

File Name: sketch.ino

This code configures pin D13 as an output in the setup() function. The loop() function then repeatedly turns the LED on and off, with one-second intervals between state changes. The digitalWrite() function is used to set the pin high or low, and the delay() function pauses the program for 1000 milliseconds (1 second) between each toggle.