Circuit Documentation

Summary

This document provides a detailed overview of a circuit that includes an Arduino UNO microcontroller, a water pump, two LEDs (red and green), an L298N DC motor driver, an HC-SR04 ultrasonic sensor, and resistors. The circuit is designed to control the water pump and LEDs based on sensor inputs and microcontroller logic.

Component List

Arduino UNO

• Description: A 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

Water Pump

• Description: A small DC water pump.
• Pins: VCC, GND

LED: Two Pin (red)

• Description: A red LED.
• Pins: cathode, anode

LED: Two Pin (green)

• Description: A green LED.
• Pins: cathode, anode

L298N DC Motor Driver

• Description: A 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

HC-SR04 Ultrasonic Sensor

• Description: An ultrasonic distance sensor.
• Pins: VCC, TRIG, ECHO, GND

Resistor (330 Ohms)

• Description: A resistor with a resistance of 330 Ohms.
• Pins: pin1, pin2

Wiring Details

Arduino UNO

• 5V connected to VCC of HC-SR04 Ultrasonic Sensor
• GND connected to pin1 of Resistor (330 Ohms), GND of HC-SR04 Ultrasonic Sensor, and pin1 of another Resistor (330 Ohms)
• D11 connected to ECHO of HC-SR04 Ultrasonic Sensor
• D10 connected to TRIG of HC-SR04 Ultrasonic Sensor
• D9 connected to ENA of L298N DC Motor Driver
• D8 connected to IN2 of L298N DC Motor Driver
• D7 connected to IN1 of L298N DC Motor Driver
• D5 connected to anode of LED (green)
• D4 connected to anode of LED (red)

Water Pump

• VCC connected to OUT2 of L298N DC Motor Driver
• GND connected to OUT1 of L298N DC Motor Driver

LED: Two Pin (red)

• anode connected to D4 of Arduino UNO
• cathode connected to pin2 of Resistor (330 Ohms)

LED: Two Pin (green)

• anode connected to D5 of Arduino UNO
• cathode connected to pin2 of another Resistor (330 Ohms)

L298N DC Motor Driver

• ENA connected to D9 of Arduino UNO
• IN2 connected to D8 of Arduino UNO
• IN1 connected to D7 of Arduino UNO
• OUT2 connected to VCC of Water Pump
• OUT1 connected to GND of Water Pump

HC-SR04 Ultrasonic Sensor

• VCC connected to 5V of Arduino UNO
• TRIG connected to D10 of Arduino UNO
• ECHO connected to D11 of Arduino UNO
• GND connected to GND of Arduino UNO

Resistor (330 Ohms)

• pin1 connected to GND of Arduino UNO and GND of HC-SR04 Ultrasonic Sensor
• pin2 connected to cathode of LED (red)

Resistor (330 Ohms)

• pin1 connected to GND of Arduino UNO and GND of HC-SR04 Ultrasonic Sensor
• pin2 connected to cathode of LED (green)

Code Documentation

Arduino UNO 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 UNO. The setup() function is used to initialize any settings or configurations, and the loop() function contains the main logic that runs repeatedly.

Additional Notes

• Ensure all connections are secure and double-check the wiring before powering the circuit.
• The resistors are used to limit the current through the LEDs to prevent damage.
• The L298N motor driver is used to control the water pump, allowing for direction and speed control.
• The HC-SR04 ultrasonic sensor is used to measure distance, which can be utilized in the loop() function to control the water pump and LEDs based on proximity.