Circuit Documentation

Summary

This circuit integrates various components controlled by an Arduino Nano microcontroller. It includes flame sensors for detecting fire, a servo motor for actuation, a DC motor driver to control hobby motors, a voltage regulator to stabilize the power supply, and a transistor setup to control a water pump. The circuit is powered by 18650 batteries and includes a rocker switch for power control.

Component List

Microcontroller

• Arduino Nano: A compact microcontroller board based on the ATmega328P, featuring digital and analog I/O pins.

Power Supply

• 2x 18650 Batteries: Lithium-ion batteries providing the power source for the circuit.
• 7805 Voltage Regulator: A voltage regulator that outputs a stable 5V from a higher voltage input.
• 18650 Battery Holder: A holder for a single 18650 battery.

Sensors

• KY-026 Flame Sensors: Sensors used for detecting flames or fire.

Motor Control

• L298N DC Motor Driver: A module for controlling DC motors with direction and speed control.
• Hobby Motors: Yellow DC gear motors used for driving mechanical parts.

Actuator

• Servo: A rotary actuator or linear actuator that allows for precise control of angular or linear position.

Switching

• Rocker Switch: A switch to control the power supply to the circuit.
• BC547 Transistor: An NPN transistor used as a switch or amplifier.
• Resistor: A 200 Ohm resistor used for current limiting or voltage division.

Output

• Water Pump: A pump used for moving water, controlled by the transistor.

Wiring Details

Arduino Nano

• Digital pins D2, D3, D4 are connected to the D0 pins of three separate KY-026 Flame Sensors.
• Digital pin D5 is connected to the PWM pin of the Servo.
• Digital pins D6, D7, D8, D9 are connected to the IN1, IN2, IN3, IN4 pins of the L298N DC Motor Driver, respectively.
• Digital pin D10 is connected to one pin of a 200 Ohm Resistor.
• VIN pin is connected to the input of the 7805 Voltage Regulator, the 12V pin of the L298N DC Motor Driver, and one terminal of the Rocker Switch.
• GND pin is connected to the common ground of the circuit.

2x 18650 Batteries

• VCC is connected to one terminal of the Rocker Switch.
• GND is connected to the common ground of the circuit.

KY-026 Flame Sensors

• A0 pins are not connected.
• GND pins are connected to the common ground of the circuit.
• VCC pins are connected to the 5V output of the 7805 Voltage Regulator.

L298N DC Motor Driver

• OUT1 and OUT2 are connected to two Hobby Motors.
• OUT3 and OUT4 are connected to two other Hobby Motors.
• 12V is connected to the VIN pin of the Arduino Nano.
• GND is connected to the common ground of the circuit.
• 5V is not connected.

Hobby Motors

• VCC pins are connected to OUT1/OUT3 of the L298N DC Motor Driver.
• GND pins are connected to OUT2/OUT4 of the L298N DC Motor Driver.

Servo

• GND is connected to the common ground of the circuit.
• VCC is connected to the 5V output of the 7805 Voltage Regulator.
• PWM is connected to the D5 pin of the Arduino Nano.

7805 Voltage Regulator

• Vin is connected to the VIN pin of the Arduino Nano and one terminal of the Rocker Switch.
• Gnd is connected to the common ground of the circuit.
• Vout is connected to the VCC pins of the KY-026 Flame Sensors and the Servo.

Rocker Switch

• Terminal 1 is connected to the VIN pin of the Arduino Nano and the Vin pin of the 7805 Voltage Regulator.
• Terminal 2 is connected to the VCC of the 2x 18650 Batteries.

Water Pump

• VCC is connected to the Collector pin of the BC547 Transistor.
• GND is connected to the common ground of the circuit.

Resistor

• One pin is connected to the D10 pin of the Arduino Nano.
• The other pin is connected to the Base pin of the BC547 Transistor.

BC547 Transistor

• Collector is connected to the VCC pin of the Water Pump.
• Base is connected to one pin of the 200 Ohm Resistor.
• Emitter is connected to the common ground of the circuit.

18650 Battery Holder

• VCC is connected to the VCC pin of the Water Pump.
• GND is connected to the common ground of the circuit.

Documented Code

Arduino Nano - sketch.ino

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

}

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

}

Arduino Nano - documentation.txt

(No additional documentation provided for the code)

(Note: The code provided is a template and does not include any functionality. Additional code is required to control the components based on the circuit design.)