Circuit Documentation

Summary

This circuit is designed to control a centrifuge using an Arduino UNO. The system includes an LCD screen for displaying information, a Bluetooth module for wireless communication, an IR receiver for remote control, a DC motor driver for controlling the motor, a relay module for switching, and a buzzer for alerts. The circuit also includes multiple pushbuttons for user input.

Component List

1. Arduino UNO

   • Description: 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

2. HC-06

   • Description: Bluetooth module for wireless communication.
   • Pins: RXD, TXD, GND, VCC

3. LCD screen 16x2 I2C

   • Description: 16x2 character LCD display with I2C interface.
   • Pins: SCL, SDA, VCC, GND

4. DC Motor

   • Description: DC motor for driving the centrifuge.
   • Pins: positive, negative

5. 2 Channel Relay Module

   • Description: Relay module for switching high-power devices.
   • Pins: N.O. 2, COM 2, N.C. 2, N.O. 1, COM 1, N.C. 1, pin 7, pin 8, pin 9, pin 10, pin 11, pin 12, VCC+, VCC- (GND), IN 1, IN 2

6. Buzzer

   • Description: Buzzer for audio alerts.
   • Pins: PIN, GND

7. IR Receiver

   • Description: Infrared receiver for remote control.
   • Pins: DATA, VCC, GND

8. L298N DC Motor Driver

   • Description: Motor driver module for controlling the DC motor.
   • 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

9. Pushbutton

   • Description: Pushbutton for user input.
   • Pins: Pin 2, Pin 1, Pin 3, Pin 4

10. 12V Power Supply

    • Description: Power supply providing 12V.
    • Pins: +, -

Wiring Details

Arduino UNO

• GND: Connected to GND of 12V power supply, L298N DC motor driver, LCD screen, 2 channel relay module, buzzer, HC-06, IR Receiver, and all pushbuttons.
• 5V: Connected to VCC of LCD screen, HC-06, IR Receiver, and 2 channel relay module.
• A0: Connected to Pin 4 of a pushbutton.
• A1: Connected to Pin 4 of a pushbutton.
• A2: Connected to Pin 4 of a pushbutton.
• A3: Connected to Pin 4 of a pushbutton.
• SCL: Connected to SCL of LCD screen.
• SDA: Connected to SDA of LCD screen.
• D12: Connected to IN 2 of 2 channel relay module.
• D11: Connected to IN 1 of 2 channel relay module.
• D9: Connected to ENB of L298N DC motor driver.
• D8: Connected to IN4 of L298N DC motor driver.
• D7: Connected to IN3 of L298N DC motor driver.
• D6: Connected to PIN of buzzer.
• D4: Connected to DATA of IR Receiver.
• D3: Connected to RXD of HC-06.
• D2: Connected to TXD of HC-06.

HC-06

• RXD: Connected to D3 of Arduino UNO.
• TXD: Connected to D2 of Arduino UNO.
• GND: Connected to GND of Arduino UNO.
• VCC: Connected to 5V of Arduino UNO.

LCD screen 16x2 I2C

• SCL: Connected to SCL of Arduino UNO.
• SDA: Connected to SDA of Arduino UNO.
• VCC: Connected to 5V of Arduino UNO.
• GND: Connected to GND of Arduino UNO.

DC Motor

• positive: Connected to OUT4 of L298N DC motor driver and N.O. 2 of 2 channel relay module.
• negative: Connected to GND of 12V power supply.

2 Channel Relay Module

• VCC+: Connected to 5V of Arduino UNO.
• VCC- (GND): Connected to GND of Arduino UNO.
• IN 1: Connected to D11 of Arduino UNO.
• IN 2: Connected to D12 of Arduino UNO.
• N.O. 1: Connected to 12V of L298N DC motor driver.
• N.O. 2: Connected to positive of DC motor.
• COM 1: Connected to + of 12V power supply.
• COM 2: Connected to COM 1.

Buzzer

• PIN: Connected to D6 of Arduino UNO.
• GND: Connected to GND of Arduino UNO.

IR Receiver

• DATA: Connected to D4 of Arduino UNO.
• VCC: Connected to 5V of Arduino UNO.
• GND: Connected to GND of Arduino UNO.

L298N DC Motor Driver

• GND: Connected to GND of 12V power supply.
• OUT3: Connected to GND of 12V power supply.
• OUT4: Connected to N.O. 2 of 2 channel relay module and positive of DC motor.
• 12V: Connected to N.O. 1 of 2 channel relay module.
• ENB: Connected to D9 of Arduino UNO.
• IN4: Connected to D8 of Arduino UNO.
• IN3: Connected to D7 of Arduino UNO.

Pushbuttons

• Pin 2: Connected to GND of Arduino UNO.
• Pin 4: Connected to A0, A1, A2, and A3 of Arduino UNO respectively.

12V Power Supply

• +: Connected to COM 1 of 2 channel relay module.
• -: Connected to GND of Arduino UNO, L298N DC motor driver, LCD screen, 2 channel relay module, buzzer, HC-06, IR Receiver, and all pushbuttons.

Code Documentation

#include <Wire.h>
#include <LiquidCrystal_I2C.h>
#include <SoftwareSerial.h>
#include <IRremote.h>

IRrecv receiver(4); // تم تغيير بن الاستقبال إلى 4
LiquidCrystal_I2C lcd(0x27, 16, 2);

// تعريف أزرار التحكم
#define bt_set    A3
#define bt_up     A2
#define bt_down   A1
#define bt_start  A0

// المتغيرات الخاصة بالوقت والسرعة
int time_s = 0;
int time_m = 0;
int set = 0;
bool timerRunning = false;
bool buzzerActive = false;
int speed = 5; // السرعة الأولية (5 إلى 8)

// منافذ البازر
int buzzer = 6;

// منافذ L298N للموتور
#define motorENA 9
#define motorIN1 7
#define motorIN2 8

// منافذ الريلاي
#define relayMotorDriver 11
#define relayMotor 10

unsigned long previousMillis = 0;
const long interval = 1000;

// إعداد الاتصال التسلسلي مع HC-05
SoftwareSerial btSerial(2, 3); // (RX, TX)

void setup() {
  pinMode(bt_set,   INPUT_PULLUP);
  pinMode(bt_up,    INPUT_PULLUP);
  pinMode(bt_down,  INPUT_PULLUP);
  pinMode(bt_start, INPUT_PULLUP);
  pinMode(buzzer, OUTPUT);

  // إعداد منافذ L298N
  pinMode(motorENA, OUTPUT);
  pinMode(motorIN1, OUTPUT);
  pinMode(motorIN2, OUTPUT);

  // إعداد اتجاه المحرك
  digitalWrite(motorIN1, HIGH);
  digitalWrite(motorIN2, LOW);

  // إعداد منافذ الريلاي
  pinMode(relayMotorDriver, OUTPUT);
  pinMode(relayMotor, OUTPUT);
  
  // تهيئة جهاز الاستقبال للأشعة تحت الحمراء