Circuit Documentation

Summary

This circuit is designed to control a DC motor and two LEDs (blue and red) using three pushbuttons. The Arduino UNO microcontroller is the central control unit. The pushbuttons are used to toggle the motor and blue LED, increase the motor speed, and decrease the motor speed. The red LED turns on after 20 seconds when the motor is on. Additionally, a buzzer is included in the circuit.

Component List

1. Arduino UNO

   • Description: 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

2. LED: Two Pin (blue)

   • Description: Blue LED with two pins (anode and cathode).
   • Pins: cathode, anode

3. LED: Two Pin (red)

   • Description: Red LED with two pins (anode and cathode).
   • Pins: cathode, anode

4. Pushbutton

   • Description: Pushbutton with four pins.
   • Pins: Pin 3 (out), Pin 4 (out), Pin 1 (in), Pin 2 (in)

5. Resistor (1000 Ohms)

   • Description: Resistor with a resistance of 1000 Ohms.
   • Pins: pin1, pin2

6. Resistor (200 Ohms)

   • Description: Resistor with a resistance of 200 Ohms.
   • Pins: pin1, pin2

7. Buzzer

   • Description: Buzzer with two pins (PIN and GND).
   • Pins: PIN, GND

Wiring Details

Arduino UNO

• GND is connected to:

  • Pin 2 (in) of Pushbutton
  • Pin 1 (in) of Pushbutton
  • GND of Buzzer
  • pin1 of Resistor (200 Ohms)
  • pin1 of Resistor (1000 Ohms)

• D11 is connected to:

  • anode of LED (red)

• D10 is connected to:

  • anode of LED (blue)

• D9 is connected to:

  • PIN of Buzzer

• D4 is connected to:

  • Pin 3 (out) of Pushbutton

• D3 is connected to:

  • Pin 3 (out) of Pushbutton

• D2 is connected to:

  • Pin 3 (out) of Pushbutton

LED: Two Pin (blue)

• anode is connected to:

  • D10 of Arduino UNO

• cathode is connected to:

  • pin2 of Resistor (1000 Ohms)

LED: Two Pin (red)

• anode is connected to:

  • D11 of Arduino UNO

• cathode is connected to:

  • pin2 of Resistor (200 Ohms)

Pushbutton

• Pin 2 (in) is connected to:

  • GND of Arduino UNO

• Pin 1 (in) is connected to:

  • GND of Arduino UNO

• Pin 3 (out) is connected to:

  • D4 of Arduino UNO
  • D3 of Arduino UNO
  • D2 of Arduino UNO

Resistor (1000 Ohms)

• pin1 is connected to:

  • GND of Arduino UNO

• pin2 is connected to:

  • cathode of LED (blue)

Resistor (200 Ohms)

• pin1 is connected to:

  • GND of Arduino UNO

• pin2 is connected to:

  • cathode of LED (red)

Buzzer

• PIN is connected to:

  • D9 of Arduino UNO

• GND is connected to:

  • GND of Arduino UNO

Code Documentation

/*
 * This Arduino sketch controls a DC motor and LEDs using three pushbuttons.
 * - ON/OFF button toggles the motor and blue LED.
 * - Flame Increase button increases the motor speed.
 * - Flame Decrease button decreases the motor speed.
 * - Red LED turns on after 20 seconds when the motor is on.
 */

// Define pin connections
const int motorPin = 9; // DC Motor connected to digital pin 9
const int blueLEDPin = 10; // Blue LED connected to digital pin 10
const int redLEDPin = 11; // Red LED connected to digital pin 11
const int onOffButtonPin = 2; // ON/OFF button connected to digital pin 2
const int flameIncreaseButtonPin = 3; // Flame Increase button connected to pin 3
const int flameDecreaseButtonPin = 4; // Flame Decrease button connected to pin 4

// Variables to store the state
bool motorState = false;
unsigned long motorOnTime = 0;
int motorSpeed = 0; // Motor speed (0-255)

void setup() {
  // Set pin modes
  pinMode(motorPin, OUTPUT);
  pinMode(blueLEDPin, OUTPUT);
  pinMode(redLEDPin, OUTPUT);
  pinMode(onOffButtonPin, INPUT_PULLUP);
  pinMode(flameIncreaseButtonPin, INPUT_PULLUP);
  pinMode(flameDecreaseButtonPin, INPUT_PULLUP);
}

void loop() {
  // Check ON/OFF button state
  if (digitalRead(onOffButtonPin) == LOW) {
    delay(50); // Debounce delay
    if (digitalRead(onOffButtonPin) == LOW) {
      motorState = !motorState;
      motorOnTime = millis();
      digitalWrite(motorPin, motorState ? HIGH : LOW);
      digitalWrite(blueLEDPin, motorState ? HIGH : LOW);
      delay(500); // Prevent multiple toggles
    }
  }

  // Check Flame Increase button state
  if (digitalRead(flameIncreaseButtonPin) == LOW) {
    delay(50); // Debounce delay
    if (digitalRead(flameIncreaseButtonPin) == LOW) {
      motorSpeed = min(motorSpeed + 25, 255); // Increase speed
      analogWrite(motorPin, motorSpeed);
      delay(500); // Prevent multiple adjustments
    }
  }

  // Check Flame Decrease button state
  if (digitalRead(flameDecreaseButtonPin) == LOW) {
    delay(50); // Debounce delay
    if (digitalRead(flameDecreaseButtonPin) == LOW) {
      motorSpeed = max(motorSpeed - 25, 0); // Decrease speed
      analogWrite(motorPin, motorSpeed);
      delay(500); // Prevent multiple adjustments
    }
  }

  // Turn on Red LED after 20 seconds if motor is on
  if (motorState && (millis() - motorOnTime >= 20000)) {
    digitalWrite(redLEDPin, HIGH);
  } else {
    digitalWrite(redLEDPin, LOW);
  }
}

This code controls the DC motor and LEDs based on the state of the pushbuttons. The motor and blue LED are toggled on and off by the ON/OFF button. The motor speed is increased and decreased by the Flame Increase and Flame Decrease buttons, respectively. The red LED turns on after 20 seconds if the motor is on.