Circuit Documentation

Summary

This document provides a detailed overview of a circuit designed to control various motors and servos using an Arduino UNO. The circuit includes components such as DC motors, servo motors, a Bluetooth module, a relay, and a motor driver. The Arduino UNO is programmed to control these components based on commands received via Bluetooth.

Component List

1. Arduino UNO

   • Description: 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

2. DC Motor

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

3. 3.7v Battery

   • Description: 3.7V battery for power supply.
   • Pins: +, -

4. Rocker Switch

   • Description: Switch to control power flow.
   • Pins: output, input

5. HC-05 Bluetooth Module

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

6. DC-DC Converter

   • Description: DC-DC converter for voltage regulation.
   • Pins: +VCC IN, GND IN, +VCC OUT, GND OUT

7. Servo Motor

   • Description: Standard servo motor.
   • Pins: PWM, GND, VCC

8. Tower Pro SG90 Servo

   • Description: Small servo motor.
   • Pins: Signal, +5V, GND

9. 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

10. 1 Channel Relay 5V

    • Description: Relay module for switching.
    • Pins: VCC, GND, IN, NC, COM, NO

11. Water Pump

    • Description: Small water pump.
    • Pins: VCC, GND

Wiring Details

Arduino UNO

• 5V connected to 5V VCC of MOTOR DEIVE
• GND connected to GND of MOTOR DEIVE
• D13 connected to IN4 of MOTOR DEIVE
• D12 connected to IN of 1 Channel Relay 5V
• D11 connected to PWM of SERVO MOTOR
• D10 connected to EN2 of MOTOR DEIVE
• D9 connected to EN1 of MOTOR DEIVE
• D8 connected to IN2 of L298N DC motor driver
• D7 connected to IN1 of L298N DC motor driver
• D6 connected to Signal of Tower Pro SG90 servo
• D5 connected to PWM of SERVO MOTOR
• D4 connected to IN3 of MOTOR DEIVE
• D3 connected to IN2 of MOTOR DEIVE
• D2 connected to IN1 of MOTOR DEIVE
• D1 connected to RXD of HC-05 Bluetooth Module
• D0 connected to TXD of HC-05 Bluetooth Module

DC Motor

• pin 1 connected to A+ of MOTOR DEIVE
• pin 2 connected to A- of MOTOR DEIVE

3.7v Battery

• + connected to input of rocker switch
• - connected to GND of MOTOR DEIVE

Rocker Switch

• output connected to 12V VCC of MOTOR DEIVE

HC-05 Bluetooth Module

• VCC connected to +VCC OUT of DC-DC converter
• GND connected to GND OUT of DC-DC converter

DC-DC Converter

• +VCC IN connected to 12V VCC of MOTOR DEIVE
• GND IN connected to GND of MOTOR DEIVE
• +VCC OUT connected to VCC of HC-05 Bluetooth Module
• GND OUT connected to GND of HC-05 Bluetooth Module

Servo Motor

• PWM connected to D11 of Arduino UNO
• GND connected to GND OUT of DC-DC converter
• VCC connected to +VCC OUT of DC-DC converter

Tower Pro SG90 Servo

• Signal connected to D6 of Arduino UNO
• +5V connected to +VCC OUT of DC-DC converter
• GND connected to GND OUT of DC-DC converter

L298N DC Motor Driver

• IN2 connected to D8 of Arduino UNO
• IN1 connected to D7 of Arduino UNO
• OUT1 connected to pin 2 of DC Motor
• OUT2 connected to pin 1 of DC Motor

1 Channel Relay 5V

• IN connected to D12 of Arduino UNO
• VCC connected to +VCC OUT of DC-DC converter
• GND connected to GND OUT of DC-DC converter

Water Pump

• VCC connected to +5V of Tower Pro SG90 servo
• GND connected to GND of MOTOR DEIVE

Documented Code

Arduino UNO Code

#include <Servo.h>

// Pin Definitions
#define LEFT_MOTOR1 2       
#define LEFT_MOTOR2 3       
#define RIGHT_MOTOR1 4      
#define RIGHT_MOTOR2 13     
#define LEFT_MOTOR_ENABLE 9 
#define RIGHT_MOTOR_ENABLE 10 

#define DRILL_MOTOR_IN1 7   
#define DRILL_MOTOR_IN2 8   

#define PUMP_RELAY_PIN 12   
#define SEED_SERVO_PIN 6    
#define PLOUGH_SERVO_PIN 11 
#define DIGGING_SERVO_PIN 5 

// Servo Objects
Servo seedDispenserServo;   
Servo ploughToolServo;      
Servo diggingSupportServo;  

// Bluetooth Command Variable
char command;

// Speed Control Variable
int motorSpeed = 200;  

// Forward Declaration for stopMotors
void stopMotors();

void moveForward() {
  analogWrite(LEFT_MOTOR_ENABLE, motorSpeed);  
  analogWrite(RIGHT_MOTOR_ENABLE, motorSpeed); 
  digitalWrite(LEFT_MOTOR1, LOW);
  digitalWrite(LEFT_MOTOR2, HIGH);
  digitalWrite(RIGHT_MOTOR1, HIGH);
  digitalWrite(RIGHT_MOTOR2, LOW);
}

void moveBackward() {
  analogWrite(LEFT_MOTOR_ENABLE, motorSpeed);  
  analogWrite(RIGHT_MOTOR_ENABLE, motorSpeed); 
  digitalWrite(LEFT_MOTOR1, HIGH);
  digitalWrite(LEFT_MOTOR2, LOW);
  digitalWrite(RIGHT_MOTOR1, LOW);
  digitalWrite(RIGHT_MOTOR2, HIGH);
}

void turnLeft() {
  analogWrite(LEFT_MOTOR_ENABLE, motorSpeed / 2); 
  analogWrite(RIGHT_MOTOR_ENABLE, motorSpeed);   
  digitalWrite(LEFT_MOTOR1, HIGH);
  digitalWrite(LEFT_MOTOR2, LOW);
  digitalWrite(RIGHT_MOTOR1, HIGH);
  digitalWrite(RIGHT_MOTOR2, LOW);
  delay(1000); 
  stopMotors(); 
  delay(500); 
  moveForward(); 
}

void turnRight() {
  analogWrite(LEFT_MOTOR_ENABLE, motorSpeed);   
  analogWrite(RIGHT_MOTOR_ENABLE, motorSpeed / 2); 
  digitalWrite(LEFT_MOTOR1, LOW);
  digitalWrite(LEFT_MOTOR2, HIGH);
  digitalWrite(RIGHT_MOTOR1, LOW);
  digitalWrite(RIGHT_MOTOR2, HIGH);
  delay(1000); 
  stopMotors(); 
  delay(500); 
  moveForward(); 
}

void stopMotors() {
  digitalWrite(LEFT_MOTOR1, LOW);
  digitalWrite(LEFT_MOTOR2, LOW);
  digitalWrite(RIGHT_MOTOR1, LOW);
  digitalWrite(RIGHT_MOTOR2, LOW);
  
  analogWrite(LEFT_MOTOR_ENABLE, 0);
  analogWrite(RIGHT_MOTOR_ENABLE, 0);
}

void digging() {
  diggingSupportServo.write(0); 
  delay(1000); 

  digitalWrite(DRILL_MOTOR_IN1, HIGH); 
  digitalWrite