Circuit Documentation

Summary

This circuit is designed to control two DC Mini Metal Gear Motors using an L298N DC motor driver, powered by a 7.4V battery and regulated by an XL4015 5A DC Buck Step-down converter. The control logic is managed by an Arduino Nano microcontroller.

Component List

L298N DC Motor Driver

• Description: A dual H-Bridge motor driver that allows control of the speed and direction of two DC motors.
• 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

7.4V Battery

• Description: A 7.4V battery used to power the circuit.
• Pins: +, -

XL4015 5A DC Buck Step-down

• Description: A DC-DC buck converter that steps down the 7.4V battery voltage to a lower voltage suitable for the motor driver and microcontroller.
• Pins: Output +, Output -, Input +, Input -

Arduino Nano

• Description: A small, complete, and breadboard-friendly microcontroller board based on the ATmega328P.
• Pins: D1/TX, D0/RX, RESET, GND, D2, D3, D4, D5, D6, D7, D8, D9, D10, D11/MOSI, D12/MISO, VIN, 5V, A7, A6, A5, A4, A3, A2, A1, A0, AREF, 3V3, D13/SCK

DC Mini Metal Gear Motor (Motor 1)

• Description: A small DC motor with metal gears for increased torque.
• Pins: IN1, IN2

DC Mini Metal Gear Motor (Motor 2)

• Description: A small DC motor with metal gears for increased torque.
• Pins: IN1, IN2

Wiring Details

L298N DC Motor Driver

• OUT1 connected to IN2 of Motor 2
• OUT2 connected to IN1 of Motor 2
• 12V connected to Output + of XL4015 and VIN of Arduino Nano
• GND connected to Output - of XL4015 and GND of Arduino Nano
• OUT3 connected to IN2 of Motor 1
• OUT4 connected to IN1 of Motor 1
• ENA connected to D6 of Arduino Nano
• IN1 connected to D2 of Arduino Nano
• IN2 connected to D3 of Arduino Nano
• IN3 connected to D4 of Arduino Nano
• IN4 connected to D5 of Arduino Nano
• ENB connected to D7 of Arduino Nano

7.4V Battery

• + connected to Input + of XL4015
• - connected to Input - of XL4015

XL4015 5A DC Buck Step-down

• Output + connected to 12V of L298N and VIN of Arduino Nano
• Output - connected to GND of L298N and GND of Arduino Nano
• Input + connected to + of 7.4V Battery
• Input - connected to - of 7.4V Battery

Arduino Nano

• VIN connected to Output + of XL4015
• GND connected to Output - of XL4015
• D2 connected to IN1 of L298N
• D3 connected to IN2 of L298N
• D4 connected to IN3 of L298N
• D5 connected to IN4 of L298N
• D6 connected to ENA of L298N
• D7 connected to ENB of L298N

DC Mini Metal Gear Motor (Motor 1)

• IN1 connected to OUT4 of L298N
• IN2 connected to OUT3 of L298N

DC Mini Metal Gear Motor (Motor 2)

• IN1 connected to OUT2 of L298N
• IN2 connected to OUT1 of L298N

Documented Code

Arduino Nano Code (sketch.ino)

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

}

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

}

Additional Documentation (documentation.txt)

This documentation provides a comprehensive overview of the circuit, including a summary, detailed component list, wiring details, and the code used in the Arduino Nano microcontroller.