Circuit Documentation

Summary

This document provides a detailed overview of a circuit that includes various components such as an Arduino UNO, Arduino Nano, HC-05 Bluetooth Modules, L298N DC motor driver, motors with reducers, battery mounts, and a Rocker Switch (SPST). The circuit is designed to control motors via Bluetooth communication and includes power management and motor control functionalities.

Component List

1. Rocker Switch (SPST)

   • Description: A single-pole single-throw switch used to control the power supply.
   • Pins: 1, 2

2. Motor with reducer

   • Description: A motor with an integrated reducer to control speed and torque.
   • Pins: 3 - 6 VCC, GND

3. L298N DC motor driver

   • Description: A dual H-Bridge motor driver used to control the direction and speed of 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

4. 4 x AAA Battery Mount

   • Description: A battery holder for four AAA batteries.
   • Pins: -, +

5. HC-05 Bluetooth Module

   • Description: A Bluetooth module used for wireless communication.
   • Pins: Key, VCC, TXD, RXD, State, GND

6. 2x 18650

   • Description: A battery holder for two 18650 batteries.
   • Pins: vcc, gnd

7. Arduino UNO

   • Description: A 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

8. 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

9. MPU-6050

   • Description: A 6-axis motion tracking device that combines a 3-axis gyroscope and a 3-axis accelerometer.
   • Pins: VCC, GND, SCL, SDA, XDA, XCL, AD0, INT

Wiring Details

Rocker Switch (SPST)

• Pin 1: Connected to the positive terminal of the 4 x AAA Battery Mount.
• Pin 2: Connected to the 12V pin of the L298N DC motor driver and the VIN pin of the Arduino Nano.

Motor with reducer

• Instance 1

  • 3 - 6 VCC: Connected to the OUT2 pin of the L298N DC motor driver.
  • GND: Connected to the OUT1 pin of the L298N DC motor driver.

• Instance 2

  • 3 - 6 VCC: Connected to the OUT2 pin of the L298N DC motor driver.
  • GND: Connected to the OUT1 pin of the L298N DC motor driver.

• Instance 3

  • 3 - 6 VCC: Connected to the OUT3 pin of the L298N DC motor driver.
  • GND: Connected to the OUT4 pin of the L298N DC motor driver.

• Instance 4

  • 3 - 6 VCC: Connected to the OUT3 pin of the L298N DC motor driver.
  • GND: Connected to the OUT4 pin of the L298N DC motor driver.

L298N DC motor driver

• GND: Connected to the GND pin of the Arduino UNO and the negative terminal of the 4 x AAA Battery Mount.
• 5V: Connected to the Vin pin of the Arduino UNO.
• 12V: Connected to pin 2 of the Rocker Switch (SPST).
• OUT1: Connected to the GND pin of the first and second Motor with reducer.
• OUT2: Connected to the 3 - 6 VCC pin of the first and second Motor with reducer.
• OUT3: Connected to the 3 - 6 VCC pin of the third and fourth Motor with reducer.
• OUT4: Connected to the GND pin of the third and fourth Motor with reducer.
• ENA: Connected to the D3 pin of the Arduino UNO.
• IN1: Connected to the D4 pin of the Arduino UNO.
• IN2: Connected to the D5 pin of the Arduino UNO.
• IN3: Connected to the D7 pin of the Arduino UNO.
• IN4: Connected to the D8 pin of the Arduino UNO.
• ENB: Connected to the D9 pin of the Arduino UNO.

4 x AAA Battery Mount

• -: Connected to the GND pin of the L298N DC motor driver.
• +: Connected to pin 1 of the Rocker Switch (SPST).

HC-05 Bluetooth Module

• Instance 1

  • VCC: Connected to the 5V pin of the Arduino UNO.
  • GND: Connected to the GND pin of the Arduino UNO.
  • RXD: Connected to the D11 pin of the Arduino UNO.
  • TXD: Connected to the D10 pin of the Arduino UNO.

• Instance 2

  • VCC: Connected to the 5V pin of the Arduino Nano.
  • GND: Connected to the GND pin of the Arduino Nano.
  • RXD: Connected to the D11/MOSI pin of the Arduino Nano.
  • TXD: Connected to the D10 pin of the Arduino Nano.

2x 18650

• vcc: Connected to pin 1 of the Rocker Switch (SPST).
• gnd: Connected to the GND pin of the Arduino Nano.

Arduino UNO

• 5V: Connected to the VCC pin of the HC-05 Bluetooth Module.
• GND: Connected to the GND pin of the HC-05 Bluetooth Module and the L298N DC motor driver.
• Vin: Connected to the 5V pin of the L298N DC motor driver.
• D3: Connected to the ENA pin of the L298N DC motor driver.
• D4: Connected to the IN1 pin of the L298N DC motor driver.
• D5: Connected to the IN2 pin of the L298N DC motor driver.
• D7: Connected to the IN3 pin of the L298N DC motor driver.
• D8: Connected to the IN4 pin of the L298N DC motor driver.
• D9: Connected to the ENB pin of the L298N DC motor driver.
• D10: Connected to the TXD pin of the HC-05 Bluetooth Module.
• D11: Connected to the RXD pin of the HC-05 Bluetooth Module.

Arduino Nano

• 5V: Connected to the VCC pin of the MPU-6050 and the HC-05 Bluetooth Module.
• GND: Connected to the GND pin of the MPU-6050, the HC-05 Bluetooth Module, and the 2x 18650.
• VIN: Connected to pin 2 of the Rocker Switch (SPST).
• D2: Connected to the INT pin of the MPU-6050.
• D10: Connected to the TXD pin of the HC-05 Bluetooth Module.
• D11/MOSI: Connected to the RXD pin of the HC-05 Bluetooth Module.
• A4: Connected to the SDA pin of the MPU-6050.
• A5: Connected to the SCL pin of the MPU-6050.

MPU-6050

• VCC: Connected to the 5V pin of the Arduino Nano.
• GND: Connected to the GND pin of the Arduino Nano.
• SCL: Connected to the A5 pin of the Arduino Nano.
• SDA: Connected to the A4 pin of the Arduino Nano.
• INT: Connected to the D2 pin of the Arduino Nano.

Documented Code