Circuit Documentation

Summary

This document provides a detailed overview of a circuit that includes an Arduino UNO, an L298N DC motor driver, a 9V battery, a DHT22 temperature and humidity sensor, and a DC motor. The circuit is designed to control a DC motor and read temperature and humidity data from the DHT22 sensor.

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

L298N DC Motor Driver

• Description: A dual H-Bridge motor driver that allows speed and direction control of 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

9V Battery

• Description: A standard 9V battery used to power the motor driver.
• Pins: -, +

DHT22

• Description: A digital temperature and humidity sensor.
• Pins: +, Out, -

DC Motor

• Description: A standard DC motor.
• Pins: pin 1, pin 2

Wiring Details

Arduino UNO

• 5V connected to DHT22 + and L298N DC Motor Driver 5V
• GND connected to DHT22 -
• D9 connected to L298N DC Motor Driver ENA
• D8 connected to L298N DC Motor Driver IN1
• D7 connected to L298N DC Motor Driver IN2
• D2 connected to DHT22 Out

L298N DC Motor Driver

• 5V connected to Arduino UNO 5V
• GND connected to 9V Battery -
• 12V connected to 9V Battery +
• ENA connected to Arduino UNO D9
• IN1 connected to Arduino UNO D8
• IN2 connected to Arduino UNO D7
• OUT1 connected to DC Motor pin 2
• OUT2 connected to DC Motor pin 1

9V Battery

• - connected to L298N DC Motor Driver GND
• + connected to L298N DC Motor Driver 12V

DHT22

• + connected to Arduino UNO 5V
• Out connected to Arduino UNO D2
• - connected to Arduino UNO GND

DC Motor

• pin 1 connected to L298N DC Motor Driver OUT2
• pin 2 connected to L298N DC Motor Driver OUT1

Documented Code

Arduino UNO Code

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

}

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

}

Additional Documentation

This documentation provides a comprehensive overview of the circuit, including a summary, component list, wiring details, and the code used in the Arduino UNO.