Circuit Documentation

Summary

This document provides a detailed overview of a circuit designed to control a pair of DC gear motors using an L298N motor driver and an Arduino UNO. The circuit also includes an HC-SR04 ultrasonic sensor for distance measurement and two LEDs for visual indicators. The power supply is provided by a 9V battery.

Component List

1. Gearmotor DC Wheels Right

   • Pins: PIN1, PIN2
   • Description: A DC gear motor used for the right wheel of the robot.

2. Gearmotor DC Wheels Left

   • Pins: PIN1, PIN2
   • Description: A DC gear motor used for the left wheel of the robot.

3. L298N DC Motor Driver

   • Pins: OUT1, OUT2, 12V, GND, 5V, OUT3, OUT4, 5V-ENA-JMP-I, 5V-ENA-JMP-O, +5V-J1, +5V-J2, ENA, IN1, IN2, IN3, IN4, ENB
   • Description: A dual H-bridge motor driver used to control the DC gear motors.

4. Arduino UNO

   • 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
   • Description: A microcontroller board based on the ATmega328P.

5. HC-SR04 Ultrasonic Sensor

   • Pins: VCC, TRIG, ECHO, GND
   • Description: An ultrasonic sensor used for distance measurement.

6. Resistor (220 Ohms)

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

7. LED: Two Pin (Red)

   • Pins: cathode, anode
   • Description: A red LED used as a visual indicator.

8. LED: Two Pin (Green)

   • Pins: cathode, anode
   • Description: A green LED used as a visual indicator.

9. Battery 9V

   • Pins: VCC, GND
   • Description: A 9V battery used as the power supply for the circuit.

Wiring Details

Gearmotor DC Wheels Right

• PIN1 connected to OUT4 of L298N DC Motor Driver
• PIN2 connected to OUT3 of L298N DC Motor Driver

Gearmotor DC Wheels Left

• PIN1 connected to OUT2 of L298N DC Motor Driver
• PIN2 connected to OUT1 of L298N DC Motor Driver

L298N DC Motor Driver

• GND connected to:
  • pin1 of Resistor
  • GND of Arduino UNO
  • GND of Battery 9V
• 12V connected to:
  • Vin of Arduino UNO
  • VCC of Battery 9V
• IN1 connected to D8 of Arduino UNO
• IN2 connected to D9 of Arduino UNO
• IN3 connected to D10 of Arduino UNO
• IN4 connected to D11 of Arduino UNO
• ENA connected to D5 of Arduino UNO
• ENB connected to D6 of Arduino UNO

Arduino UNO

• GND connected to:
  • GND of HC-SR04 Ultrasonic Sensor
  • GND of L298N DC Motor Driver
  • pin1 of Resistor
  • GND of Battery 9V
• 5V connected to VCC of HC-SR04 Ultrasonic Sensor
• Vin connected to 12V of L298N DC Motor Driver
• D3 connected to anode of LED: Two Pin (Green)
• D4 connected to anode of LED: Two Pin (Red)
• D5 connected to ENA of L298N DC Motor Driver
• D6 connected to ENB of L298N DC Motor Driver
• D7 connected to TRIG of HC-SR04 Ultrasonic Sensor
• D8 connected to IN1 of L298N DC Motor Driver
• D9 connected to IN2 of L298N DC Motor Driver
• D10 connected to IN3 of L298N DC Motor Driver
• D11 connected to IN4 of L298N DC Motor Driver
• D12 connected to ECHO of HC-SR04 Ultrasonic Sensor

HC-SR04 Ultrasonic Sensor

• VCC connected to 5V of Arduino UNO
• GND connected to GND of Arduino UNO
• TRIG connected to D7 of Arduino UNO
• ECHO connected to D12 of Arduino UNO

Resistor (220 Ohms)

• pin1 connected to GND of L298N DC Motor Driver
• pin2 connected to cathode of LED: Two Pin (Red)
• pin1 connected to GND of L298N DC Motor Driver
• pin2 connected to cathode of LED: Two Pin (Green)

LED: Two Pin (Red)

• anode connected to D4 of Arduino UNO
• cathode connected to pin2 of Resistor

LED: Two Pin (Green)

• anode connected to D3 of Arduino UNO
• cathode connected to pin1 of Resistor

Battery 9V

• VCC connected to 12V of L298N DC Motor Driver
• GND connected to GND of L298N DC Motor Driver

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:

}

Documentation (documentation.txt)

This document provides a comprehensive overview of the circuit, including a summary, component list, wiring details, and documented code.