Circuit Documentation

Summary

This document provides a detailed overview of a circuit that includes an Arduino Nano, an L298N DC motor driver, motors with wheels, a servo, a flame sensor, a water pump, a 1-channel relay, and power sources. The circuit is designed to control motors and a water pump based on sensor inputs, with the Arduino Nano serving as the central microcontroller.

Component List

2x 18650 Battery Pack

• Description: Power source for the circuit.
• Pins: VCC, GND

Arduino Nano

• Description: Microcontroller used to control the circuit.
• 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

L298N DC Motor Driver

• Description: Motor driver used to control the 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

Motor and Wheels

• Description: Motors used for movement.
• Pins: VCC, GND

1-Channel Relay (5V 10A)

• Description: Relay used to control the water pump.
• Pins: NC, Signal, C, Power, NO, Ground

Servo

• Description: Servo motor for precise control.
• Pins: GND, VCC, PWM

Flame Sensor

• Description: Sensor to detect flame.
• Pins: A0, GND, D0, VCC

Water Pump

• Description: Pump used to dispense water.
• Pins: VCC, GND

Li-ion 18650 Battery

• Description: Additional power source for the water pump.
• Pins: +, -

Wiring Details

2x 18650 Battery Pack

• VCC connected to L298N DC Motor Driver 12V
• GND connected to:
  • Servo GND
  • Flame Sensor GND
  • L298N DC Motor Driver GND
  • 1-Channel Relay Ground
  • Arduino Nano GND

Arduino Nano

• VIN connected to L298N DC Motor Driver 5V
• D6 connected to L298N DC Motor Driver ENA
• D10 connected to L298N DC Motor Driver IN1
• D9 connected to L298N DC Motor Driver IN2
• D8 connected to L298N DC Motor Driver IN3
• D7 connected to L298N DC Motor Driver IN4
• D5 connected to L298N DC Motor Driver ENB
• D3 connected to Servo PWM
• D4 connected to Flame Sensor D0
• D11/MOSI connected to 1-Channel Relay Signal
• 5V connected to:
  • Servo VCC
  • Flame Sensor VCC
  • 1-Channel Relay Power

L298N DC Motor Driver

• OUT1 connected to Motor and Wheels GND
• OUT2 connected to Motor and Wheels VCC
• OUT3 connected to Motor and Wheels GND
• OUT4 connected to Motor and Wheels VCC

Motor and Wheels

• Motor 1:
  • VCC connected to L298N DC Motor Driver OUT2
  • GND connected to L298N DC Motor Driver OUT1
• Motor 2:
  • VCC connected to L298N DC Motor Driver OUT4
  • GND connected to L298N DC Motor Driver OUT3

1-Channel Relay (5V 10A)

• Signal connected to Arduino Nano D11/MOSI
• Power connected to Arduino Nano 5V
• Ground connected to 2x 18650 Battery Pack GND
• C connected to Water Pump VCC
• NO connected to Li-ion 18650 Battery +

Servo

• GND connected to 2x 18650 Battery Pack GND
• VCC connected to Arduino Nano 5V
• PWM connected to Arduino Nano D3

Flame Sensor

• GND connected to 2x 18650 Battery Pack GND
• VCC connected to Arduino Nano 5V
• D0 connected to Arduino Nano D4

Water Pump

• VCC connected to 1-Channel Relay C
• GND connected to Li-ion 18650 Battery -

Li-ion 18650 Battery

• + connected to 1-Channel Relay NO
• - connected to Water Pump GND

Documented Code

Arduino Nano Code

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

}

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

}

This code is a basic template for the Arduino Nano. The setup() function is used to initialize any settings or configurations, and the loop() function contains the main logic that runs repeatedly. Further code can be added to control the motors, servo, and water pump based on the flame sensor input.