Circuit Documentation

Summary

The circuit in question is designed to interface various sensors, actuators, and modules with an Arduino Mega 2560 microcontroller. The circuit includes an ultrasonic sensor (HC-SR04), a GPS module (Neo 6M), line tracking sensors, a DC motor driver (L298N), a single-channel relay, multiple DC motors, a water pump, and power supply components such as a 12V battery and a solar panel. Communication between devices is facilitated by RS485 to USB converters. Additionally, a camera USB input is powered through a USB male 2-pin connection.

Component List

HC-SR04 Ultrasonic Sensor

• Pins: VCC, TRIG, ECHO, GND
• Description: This sensor is used for measuring distances using ultrasonic waves.

12V Battery

• Pins: VCC, GND
• Description: Provides the main power source for the circuit.

Arduino Mega 2560

• Pins: Multiple digital and analog I/O pins, power, and ground pins.
• Description: The central microcontroller unit for controlling and interfacing with all other components.

L298N DC Motor Driver

• Pins: OUT1, OUT2, 12V, GND, 5V, OUT3, OUT4, ENA, IN1, IN2, IN3, IN4, ENB
• Description: Used to control the direction and speed of DC motors.

12V Single Channel Relay

• Pins: NC, COM, NO, IN, GND, VCC
• Description: Acts as an electrically operated switch to control the water pump.

DC Motor

• Pins: pin 1, pin 2
• Description: Converts electrical energy into mechanical motion.

Water Pump

• Pins: VCC, GND
• Description: Used to pump water when activated by the relay.

Neo 6M GPS Module

• Pins: GND, TX, RX, VCC
• Description: Provides location data to the microcontroller.

Rock Pi (No pins listed)

• Description: A single-board computer, not directly interfaced in this circuit.

RS485 to USB Converter

• Pins: A/TX, B/RX
• Description: Facilitates RS485 communication over USB.

USB Male 2 Pin Connection

• Pins: Negative -, Positive +
• Description: Provides a USB power connection for the camera.

Camera USB Input

• Pins: negative, positive
• Description: Receives power from the USB connection.

Solar Panel

• Pins: gnd, vcc
• Description: An alternative power source that can charge the battery or power the circuit directly.

Line Tracking Sensor

• Pins: GND, VCC, SIG
• Description: Detects and follows a line on the ground.

Wiring Details

HC-SR04 Ultrasonic Sensor

• VCC: Connected to 5V power net.
• TRIG: Connected to Arduino Mega 2560 pin D3 PWM.
• ECHO: Connected to Arduino Mega 2560 pin D2 PWM.
• GND: Connected to ground net.

12V Battery

• VCC: Connected to 12V power net.
• GND: Connected to ground net.

Arduino Mega 2560

• 5V: Connected to 5V power net.
• GND: Connected to ground net.
• D2 PWM: Connected to HC-SR04 ECHO pin.
• D3 PWM: Connected to HC-SR04 TRIG pin.
• D19/RX1: Connected to Neo 6M GPS Module TX pin.
• D18/TX1: Connected to Neo 6M GPS Module RX pin.
• D1 TX0: Connected to Line Tracking Sensor SIG pin (instance 0768b8b2-78cd-4fa8-94e5-a14d2c1dbb3d).
• D4 PWM: Connected to Line Tracking Sensor SIG pin (instance 6a6e0563-e6b5-4898-942d-c9b9b081d46a).
• D5 PWM: Connected to 12V Single Channel Relay IN pin.
• D6 PWM: Connected to L298N DC motor driver IN3 pin (instance 8c8f2e21-c8ed-4337-802d-9c635ae01e6c).
• D7 PWM: Connected to L298N DC motor driver IN4 pin (instance 8c8f2e21-c8ed-4337-802d-9c635ae01e6c).
• D8 PWM: Connected to L298N DC motor driver IN1 pin (instance f8d79c62-d198-4654-9e8a-779e9c3bf133).
• D9 PWM: Connected to L298N DC motor driver IN2 pin (instance f8d79c62-d198-4654-9e8a-779e9c3bf133).
• D10 PWM: Connected to L298N DC motor driver IN3 pin (instance f8d79c62-d198-4654-9e8a-779e9c3bf133).
• D11 PWM: Connected to L298N DC motor driver IN4 pin (instance f8d79c62-d198-4654-9e8a-779e9c3bf133).
• D12 PWM: Connected to L298N DC motor driver IN1 pin (instance 8c8f2e21-c8ed-4337-802d-9c635ae01e6c).
• D13 PWM: Connected to L298N DC motor driver IN2 pin (instance 8c8f2e21-c8ed-4337-802d-9c635ae01e6c).

L298N DC Motor Driver (Instance 8c8f2e21-c8ed-4337-802d-9c635ae01e6c)

• 5V: Connected to 5V power net.
• 12V: Connected to 12V power net.
• GND: Connected to ground net.
• IN1: Connected to Arduino Mega 2560 pin D12 PWM.
• IN2: Connected to Arduino Mega 2560 pin D13 PWM.
• IN3: Connected to Arduino Mega 2560 pin D6 PWM.
• IN4: Connected to Arduino Mega 2560 pin D7 PWM.
• OUT1: Connected to DC Motor pin 1 (instance 81563cef-a912-4105-b236-38b55656291a).
• OUT2: Connected to DC Motor pin 2 (instance 81563cef-a912-4105-b236-38b55656291a).
• OUT3: Connected to DC Motor pin 1 (instance 652dac88-3477-4d5d-be6e-315dac8802de).
• OUT4: Connected to DC Motor pin 2 (instance 652dac88-3477-4d5d-be6e-315dac8802de).

L298N DC Motor Driver (Instance f8d79c62-d198-4654-9e8a-779e9c3bf133)

• 5V: Connected to 5V power net.
• 12V: Connected to 12V power net.
• GND: Connected to ground net.
• IN1: Connected to Arduino Mega 2560 pin D8 PWM.
• IN2: Connected to Arduino Mega 2560 pin D9 PWM.
• IN3: Connected to Arduino Mega 2560 pin D10 PWM.
• IN4: Connected to Arduino Mega 2560 pin D11 PWM.
• OUT1: Connected to DC Motor pin 1 (instance 218f8d1e-9012-4937-8e21-90155855d2a3).
• OUT2: Connected to DC Motor pin 2 (instance 218f8d1e-9012-4937-8e21-90155855d2a3).
• OUT3: Connected to DC Motor pin 1 (instance 9ccf7c54-b4b8-4e54-b532-78ee2addd3f0).
• OUT4: Connected to DC Motor pin 2 (instance 9ccf7c54-b4b8-4e54-b532-78ee2addd3f0).

12V Single Channel Relay

• VCC: Connected to 5V power net.
• GND: Connected to ground net.
• IN: Connected to Arduino Mega 2560 pin D5 PWM.
• COM: Connected to Water Pump GND pin.
• NO: Connected to Water Pump VCC pin.

DC Motors

• Each DC Motor has two pins (pin 1 and pin 2) connected to the corresponding OUT pins of the L298N DC motor drivers.

Water Pump

• VCC: Connected to 12V Single Channel Relay NO pin.
• GND: Connected to 12V Single Channel Relay COM pin.

Neo 6M GPS Module

• VCC: Connected to 5V power net.
• GND: Connected to ground net.
• TX: Connected to Arduino Mega 2560 pin D19/RX1.
• RX: Connected to Arduino Mega 2560 pin D18/TX1.

Line Tracking Sensors

• VCC: