Circuit Documentation

Summary

This circuit is designed to control a set of motors using an Arduino UNO microcontroller and an L298N DC motor driver. It includes a Bluetooth module (HC-05) for wireless communication and LEDs for status indication. The power is supplied by a 7V battery. The Arduino UNO is programmed to interface with the motor driver and the Bluetooth module to control the motors based on the received commands.

Component List

Arduino UNO

• Microcontroller board based on the ATmega328P
• It has 14 digital input/output pins, 6 analog inputs, a 16 MHz quartz crystal, a USB connection, a power jack, an ICSP header, and a reset button.

L298N DC Motor Driver

• A dual H-bridge motor driver capable of driving a pair of DC motors or a stepper motor.
• It has 2 input power pins, 4 input control pins, and 4 output pins to the motors.

Motors and Wheels (4x)

• DC motors connected to wheels, used for the motion of a vehicle or robot.
• Each motor has a VCC and GND pin for power connection.

LEDs (4x)

• Two red and two white LEDs used for status indication.
• Each LED has an anode and cathode pin.

HC-05 Bluetooth Module

• A wireless communication module that can be used to exchange data with other Bluetooth devices.
• It has pins for enabling, power supply, ground, and serial communication (TXD, RXD).

Set Battery (7V)

• A power source for the circuit.
• It has a positive (+) and negative (-) terminal.

Wiring Details

Arduino UNO

• 5V pin connected to the 5V pin of the L298N motor driver and VCC of HC-05.
• GND pin connected to the cathodes of all LEDs, GND of L298N, and GND of HC-05.
• Digital pins D2 and D3 connected to the anodes of the red and white LEDs, respectively.
• Digital pins D5 and D6 connected to ENA and ENB of the L298N to enable motor channels.
• Digital pins D10 to D13 connected to IN1 to IN4 of the L298N for motor control.
• Digital pins D0 and D1 connected to TXD and RXD of HC-05 for serial communication.

L298N DC Motor Driver

• 5V pin connected to the 5V pin of Arduino UNO and VCC of HC-05.
• GND pin connected to the GND of Arduino UNO and negative terminal of the battery.
• IN1 to IN4 pins connected to D10 to D13 of Arduino UNO for motor control.
• ENA and ENB pins connected to D5 and D6 of Arduino UNO to enable motor channels.
• OUT1 and OUT2 connected to the motors associated with the first channel.
• OUT3 and OUT4 connected to the motors associated with the second channel.
• 12V pin connected to the positive terminal of the battery.

Motors and Wheels

• VCC of each motor connected to OUT1/OUT3 of the L298N.
• GND of each motor connected to OUT2/OUT4 of the L298N.

LEDs

• Anodes of the red LEDs connected to D2 of Arduino UNO.
• Anodes of the white LEDs connected to D3 of Arduino UNO.
• Cathodes of all LEDs connected to GND of Arduino UNO.

HC-05 Bluetooth Module

• VCC connected to the 5V pin of Arduino UNO.
• GND connected to the GND pin of Arduino UNO.
• TXD connected to D0 of Arduino UNO.
• RXD connected to D1 of Arduino UNO.

Set Battery (7V)

• Positive terminal connected to the 12V pin of the L298N.
• Negative terminal connected to the GND pin of the L298N.

Documented Code

Arduino UNO Code (sketch.ino)

void setup() {
  // put your setup code here, to run once:

}

void loop() {
  // put your main code here, to run repeatedly:

}

Note: The provided code is a template and does not contain any functional code to control the motors or communicate with the HC-05 Bluetooth module. The user is expected to write the necessary code to implement the desired functionality.