Circuit Documentation

Summary

This circuit is designed to control a DC gearmotor using an Arduino UNO microcontroller in conjunction with an L298N DC motor driver. The system also includes two IR sensors and a tilt sensor to provide input signals to the Arduino, which then processes these signals to control the motor's operation based on the sensor readings. The IR sensors are used to detect objects or movement, while the tilt sensor detects the orientation of the device. The Arduino UNO controls the motor driver, which in turn drives the gearmotor. The motor is enabled or disabled based on the logic determined by the sensor inputs.

Component List

Arduino UNO

• Microcontroller board based on the ATmega328P
• Provides digital and analog I/O pins
• Used for processing sensor inputs and controlling the motor driver

L298N DC Motor Driver

• Dual H-Bridge motor driver
• Capable of driving two DC motors or one stepper motor
• Used to control the direction and speed of the gearmotor

Gearmotor DC / Motorreductor

• A DC motor with a gearbox for increased torque
• Driven by the L298N motor driver

IR Sensor

• Infrared sensor for object detection
• Two instances of this sensor are used in the circuit

Tilt Sensor

• Detects tilting motion
• Provides a digital signal to the Arduino UNO

Wiring Details

Arduino UNO

• 5V pin provides power to the IR sensors and the tilt sensor
• GND pin is connected to the ground pins of the IR sensors
• Digital pins D2, D3, D4, D5, D6, and D7 are used for sensor inputs and motor driver control signals

L298N DC Motor Driver

• IN3 and IN4 pins are connected to Arduino digital pins D5 and D4 for motor direction control
• ENB pin is connected to Arduino digital pin D3 for motor enable control
• OUT3 and OUT4 pins are connected to the gearmotor

Gearmotor DC / Motorreductor

• Connected to the OUT3 and OUT4 pins of the L298N motor driver

IR Sensors

• vcc pins are connected to the 5V pin of the Arduino UNO
• gnd pins are connected to the GND pin of the Arduino UNO
• out pins are connected to Arduino digital pins D6 and D7

Tilt Sensor

• One pin is connected to the 5V pin of the Arduino UNO
• The other pin is connected to Arduino digital pin D2

Documented Code

const int irSensor1 = 6;
const int irSensor2 = 7;
const int tiltSensor = 2;
const int motorEnable = 3;
const int motorIn3 = 5;
const int motorIn4 = 4;

bool IsTilt = false;
bool OnlyOneIR = false;

void setup() {
  Serial.begin(9600);

  pinMode(irSensor1, INPUT);
  pinMode(irSensor2, INPUT);
  pinMode(tiltSensor, INPUT);

  pinMode(motorEnable, OUTPUT);
  pinMode(motorIn3, OUTPUT);
  pinMode(motorIn4, OUTPUT);

  digitalWrite(motorEnable, LOW);
  digitalWrite(motorIn3, LOW);
  digitalWrite(motorIn4, LOW);
}

void loop() {
  int irSensor1Value = digitalRead(irSensor1);
  int irSensor2Value = digitalRead(irSensor2);
  int tiltSensorValue = digitalRead(tiltSensor);

  IsTilt = (tiltSensorValue == HIGH);
  OnlyOneIR = (irSensor1Value != irSensor2Value);

  Serial.print("IsTilt: ");
  Serial.print(IsTilt);
  Serial.print(" | OnlyOneIR: ");
  Serial.println(OnlyOneIR);

  if (IsTilt && OnlyOneIR) {
    digitalWrite(motorEnable, HIGH);
    digitalWrite(motorIn3, HIGH);
    digitalWrite(motorIn4, LOW);
  } else {
    digitalWrite(motorEnable, LOW);
    digitalWrite(motorIn3, LOW);
    digitalWrite(motorIn4, LOW);
  }

  delay(737);
}

The code is written for the Arduino UNO and is responsible for reading the sensor inputs and controlling the motor driver. The IR sensors are connected to digital pins D6 and D7, while the tilt sensor is connected to digital pin D2. The motor driver's enable and input pins are controlled by digital pins D3, D4, and D5. The code includes a setup routine to initialize the pins and a loop routine that reads the sensor values, processes the logic, and controls the motor accordingly. The motor is activated only when the tilt sensor is triggered and only one of the IR sensors detects an object.