Circuit Documentation

Summary

This circuit is designed to control two hobby motors using an Arduino UNO, a PIR sensor, and an L298N DC motor driver. The circuit is powered by a 12V battery and includes a rocker switch for power control. The PIR sensor detects motion and sends a signal to the Arduino, which then controls the motors through the L298N motor driver.

Component List

1. L298N DC Motor Driver

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

2. PIR Sensor

   • Description: A passive infrared sensor used to detect motion.
   • Pins: VDD, SIG, GND

3. 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

4. Battery 12V

   • Description: A 12V battery used to power the circuit.
   • Pins: +, -

5. Motor (Hobby Gear Motor)

   • Description: A small DC motor with a gearbox for increased torque.
   • Pins: vcc, GND

6. Rocker Switch

   • Description: A switch used to control the power supply to the circuit.
   • Pins: 1, 2

Wiring Details

L298N DC Motor Driver

• 12V connected to Rocker Switch pin 2
• GND connected to Battery 12V pin -
• 5V connected to Rocker Switch pin 2
• IN1 connected to Arduino UNO pin D4
• IN2 connected to Arduino UNO pin D5
• IN3 connected to Arduino UNO pin D7
• IN4 connected to Arduino UNO pin D8
• ENA connected to Arduino UNO pin D3
• ENB connected to Arduino UNO pin D6
• OUT1 connected to Motor (Hobby Gear Motor) pin vcc
• OUT2 connected to Motor (Hobby Gear Motor) pin GND
• OUT3 connected to Motor (Hobby Gear Motor) pin GND
• OUT4 connected to Motor (Hobby Gear Motor) pin vcc

PIR Sensor

• GND connected to Arduino UNO pin GND
• VDD connected to Arduino UNO pin Vin
• SIG connected to Arduino UNO pin D2

Arduino UNO

• GND connected to PIR Sensor pin GND
• Vin connected to PIR Sensor pin VDD
• D2 connected to PIR Sensor pin SIG
• D3 connected to L298N DC Motor Driver pin ENA
• D4 connected to L298N DC Motor Driver pin IN1
• D5 connected to L298N DC Motor Driver pin IN2
• D6 connected to L298N DC Motor Driver pin ENB
• D7 connected to L298N DC Motor Driver pin IN3
• D8 connected to L298N DC Motor Driver pin IN4
• GND connected to Battery 12V pin -
• GND connected to Rocker Switch pin 1

Battery 12V

• + connected to Rocker Switch pin 2
• - connected to Arduino UNO pin GND
• - connected to L298N DC Motor Driver pin GND

Motor (Hobby Gear Motor)

• vcc connected to L298N DC Motor Driver pin OUT1
• GND connected to L298N DC Motor Driver pin OUT2
• vcc connected to L298N DC Motor Driver pin OUT4
• GND connected to L298N DC Motor Driver pin OUT3

Rocker Switch

• 1 connected to Battery 12V pin -
• 2 connected to Battery 12V pin +

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:

}

Additional Documentation (documentation.txt)