Circuit Documentation

Summary

This circuit consists of an Arduino UNO microcontroller, a red LED, and a 220 Ohm resistor. The Arduino UNO is programmed to blink the LED on and off at one-second intervals.

Component List

Arduino UNO

• Description: A microcontroller board based on the ATmega328P.
• Pins: UNUSED, IOREF, Reset, 3.3V, 5V, GND, Vin, A0, A1, A2, A3, A4, A5, SCL, SDA, AREF, D13, D12, D11, D10, D9, D8, D7, D6, D5, D4, D3, D2, D1, D0

LED: Two Pin (red)

• Description: A red light-emitting diode.
• Pins: cathode, anode

Resistor

• Description: A resistor with a resistance of 220 Ohms.
• Pins: pin1, pin2
• Properties:
  • Resistance: 220 Ohms

Wiring Details

Arduino UNO

• GND: Connected to the cathode of the LED.
• D13: Connected to pin2 of the resistor.

LED: Two Pin (red)

• cathode: Connected to GND of the Arduino UNO.
• anode: Connected to pin1 of the resistor.

Resistor

• pin1: Connected to the anode of the LED.
• pin2: Connected to D13 of the Arduino UNO.

Code Documentation

Arduino UNO Code

void setup() {
  // initialize digital pin LED_BUILTIN as an output.
  pinMode(13, OUTPUT);
}

// the loop function runs over and over again forever
void loop() {
  digitalWrite(13, HIGH);  // turn the LED on (HIGH is the voltage level)
  delay(1000);             // wait for a second
  digitalWrite(13, LOW);   // turn the LED off by making the voltage LOW
  delay(1000);             // wait for a second
}

This code initializes pin 13 of the Arduino UNO as an output in the setup() function. The loop() function then continuously turns the LED on and off with a one-second delay between each state change.