Circuit Documentation

Summary

This document provides a detailed overview of a circuit that includes an Arduino UNO, an L298N DC motor driver, an XL4015 5A DC Buck Step-down, an HC-05 Bluetooth Module, multiple MG996R servos, DC motors, a 7.4V battery, and a rocker switch. The circuit is designed to control DC motors and servos, with power regulation and Bluetooth communication capabilities.

Component List

L298N DC Motor Driver

• Description: Dual H-Bridge 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

XL4015 5A DC Buck Step-down

• Description: DC-DC step-down converter
• Pins: Output +, Output -, Input +, Input -

HC-05 Bluetooth Module

• Description: Bluetooth communication module
• Pins: Key, VCC, GND, TXD, RXD, State

Arduino UNO

• Description: Microcontroller board
• 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

MG996R Servo

• Description: High-torque servo motor
• Pins: GND, VCC, SIG

DC Motor

• Description: Standard DC motor
• Pins: pin 1, pin 2

7.4V Battery

• Description: Power source
• Pins: +, -

Rocker Switch

• Description: On/Off switch
• Pins: output, input

Wiring Details

L298N DC Motor Driver

• OUT1 connected to DC Motor pin 2
• OUT2 connected to DC Motor pin 1
• 12V connected to XL4015 5A DC Buck Step-down Input +, Arduino UNO Vin, and rocker switch output
• GND connected to 7.4V Battery -, XL4015 5A DC Buck Step-down Input -, HC-05 Bluetooth Module GND, and Arduino UNO GND
• OUT3 connected to DC Motor pin 2
• OUT4 connected to DC Motor pin 1
• ENA connected to ENB and Arduino UNO D5
• IN1 connected to Arduino UNO A3
• IN2 connected to Arduino UNO A2
• IN3 connected to Arduino UNO A1
• IN4 connected to Arduino UNO A0

XL4015 5A DC Buck Step-down

• Input + connected to L298N DC Motor Driver 12V, Arduino UNO Vin, and rocker switch output
• Input - connected to 7.4V Battery -, L298N DC Motor Driver GND, HC-05 Bluetooth Module GND, and Arduino UNO GND
• Output + connected to MG996R Servo VCC
• Output - connected to MG996R Servo GND

HC-05 Bluetooth Module

• VCC connected to Arduino UNO 5V
• GND connected to 7.4V Battery -, XL4015 5A DC Buck Step-down Input -, L298N DC Motor Driver GND, and Arduino UNO GND
• TXD connected to Arduino UNO D1
• RXD connected to Arduino UNO D0

Arduino UNO

• Vin connected to XL4015 5A DC Buck Step-down Input +, L298N DC Motor Driver 12V, and rocker switch output
• GND connected to 7.4V Battery -, XL4015 5A DC Buck Step-down Input -, L298N DC Motor Driver GND, and HC-05 Bluetooth Module GND
• 5V connected to HC-05 Bluetooth Module VCC
• D5 connected to L298N DC Motor Driver ENA and ENB
• A3 connected to L298N DC Motor Driver IN1
• A2 connected to L298N DC Motor Driver IN2
• A1 connected to L298N DC Motor Driver IN3
• A0 connected to L298N DC Motor Driver IN4
• D1 connected to HC-05 Bluetooth Module TXD
• D0 connected to HC-05 Bluetooth Module RXD
• D12 connected to MG996R Servo SIG
• D11 connected to MG996R Servo SIG
• D10 connected to MG996R Servo SIG
• D9 connected to MG996R Servo SIG
• D8 connected to MG996R Servo SIG

MG996R Servo

• VCC connected to XL4015 5A DC Buck Step-down Output +
• GND connected to XL4015 5A DC Buck Step-down Output -
• SIG connected to Arduino UNO D12, D11, D10, D9, D8

DC Motor

• pin 2 connected to L298N DC Motor Driver OUT1
• pin 1 connected to L298N DC Motor Driver OUT2
• pin 2 connected to L298N DC Motor Driver OUT3
• pin 1 connected to L298N DC Motor Driver OUT4

7.4V Battery

• - connected to XL4015 5A DC Buck Step-down Input -, L298N DC Motor Driver GND, HC-05 Bluetooth Module GND, and Arduino UNO GND
• + connected to rocker switch input

Rocker Switch

• output connected to XL4015 5A DC Buck Step-down Input +, L298N DC Motor Driver 12V, and Arduino UNO Vin
• input connected to 7.4V Battery +

Documented Code

Arduino UNO Code

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

}

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

}

L298N DC Motor Driver Code

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

}

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

}

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