Circuit Documentation

Summary of the Circuit

This circuit is designed to control various components including DC motors, a servo, a water pump, and a fire alarm, all managed by an Arduino UNO microcontroller. The circuit features a 1-Channel Relay to switch higher power loads, an L298N DC motor driver to control the motors, and a piezo buzzer for audio feedback. Power is supplied by a 4 x AAA battery mount, and a rocker switch is used to control the power flow. The fire alarm sensor is included for safety purposes, and its status is monitored by the Arduino UNO.

Component List

1-Channel Relay (5V 10A)

• A relay module that can control high power/high voltage devices.
• Pins: NC, signal, C, power, NO, ground

L298N DC Motor Driver

• A motor driver module capable of driving two DC 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

DC Motor

• A standard DC motor used for motion applications.
• Pins: pin 1, pin 2

Servo

• A servo motor for precise control of angular position.
• Pins: gnd, vcc, pulse

Water Pump

• A pump for moving water, controlled by the relay.
• Pins: VCC, GND

Arduino UNO

• A microcontroller board based on the ATmega328P.
• Pins: UNUSED, IOREF, Reset, 3.3V, 5V, GND, Vin, A0-A5, SCL, SDA, AREF, D0-D13

Piezo Buzzer

• An electronic device that produces sound when an electrical signal is applied.
• Pins: pin 1, pin 2

4 x AAA Battery Mount

• A battery holder for four AAA batteries to provide power to the circuit.
• Pins: -, +

Fire Alarm

• A safety device that detects fire hazards.
• Pins: A0, D0, GND, VCC

Rocker Switch

• A switch to control the power supply to the circuit.
• Pins: output, input

Wiring Details

1-Channel Relay (5V 10A)

• Power: Connected to Arduino UNO Vin
• Ground: Connected to common ground
• Signal: Controlled by Arduino UNO D8
• Normally Open (NO): Connected to Water Pump VCC

L298N DC Motor Driver

• 5V: Powered by Arduino UNO Vin
• GND: Connected to common ground
• 12V: Controlled by rocker switch output
• IN1-IN4: Controlled by Arduino UNO D1-D4
• OUT1-OUT4: Connected to DC Motors

DC Motors

• Four DC motors connected in pairs to OUT1/OUT2 and OUT3/OUT4 of the L298N motor driver.

Servo

• VCC: Powered by Arduino UNO Vin
• GND: Connected to common ground
• Pulse: Controlled by Arduino UNO D9

Water Pump

• VCC: Connected to 1-Channel Relay NO
• GND: Connected to common ground

Arduino UNO

• Vin: Connected to 4 x AAA Battery Mount +
• GND: Connected to common ground
• D1-D12: Various controls for L298N, Piezo Buzzer, Servo, Relay, and Fire Alarm

Piezo Buzzer

• Pin 1: Connected to common ground
• Pin 2: Controlled by Arduino UNO D12

4 x AAA Battery Mount

• +: Connected to Arduino UNO Vin and rocker switch input
• -: Connected to common ground

Fire Alarm

• VCC: Powered by Arduino UNO Vin
• GND: Connected to common ground
• D0: Monitored by Arduino UNO D5

Rocker Switch

• Input: Connected to 4 x AAA Battery Mount +
• Output: Controls L298N 12V and Water Pump VCC

Documented Code

Arduino UNO Code (sketch.ino)

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

}

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

}

Note: The provided code is a template and does not contain any functional code. It needs to be populated with the logic to control the components as per the circuit's requirements.