Arduino-Based Automatic Pill Dispenser Machine with LCD Display, Servo Motor and Buzzer Reminder

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The Automatic Pill Dispenser Machine using Arduino UNO is a smart medication management system designed to dispense tablets at scheduled times with audio-visual alerts. Built using an Arduino UNO, servo motor, I2C 16x2 LCD display, push buttons, real-time clock (RTC) module, and buzzer, this system ensures timely medicine intake and reduces the risk of missed doses.

The system allows users to set medication times using push buttons. The configured schedule is stored and monitored using a Real-Time Clock (RTC) module, which ensures accurate time tracking even during power interruptions. When the preset time is reached, the buzzer alert notifies the user, and the servo motor rotates to release the required pill from the dispenser compartment.

The I2C LCD display shows current time, next dosage schedule, and system status messages such as “Medicine Time,” “Take Your Pill,” or “Dose Completed.” The automated dispensing mechanism makes it highly useful for elderly patients, individuals with chronic conditions, and healthcare monitoring systems.

This project demonstrates practical implementation of time-based automation, servo motor control using PWM, I2C communication, embedded system programming, and healthcare-focused IoT concepts. It can be further upgraded with GSM alerts, mobile app integration, and cloud-based health tracking systems.

Key Features

  • Arduino UNO-based medication reminder system

  • Real-Time Clock (RTC) for accurate scheduling

  • Servo motor-controlled pill dispensing mechanism

  • I2C 16x2 LCD display for status updates

  • Buzzer alert for medicine reminder

  • Push button interface for time setting

  • Compact and user-friendly design

  • Expandable to IoT health monitoring systems

Code:
#include <Wire.h>
#include <LiquidCrystal_I2C.h>
#include <RTClib.h>
#include <Servo.h>

LiquidCrystal_I2C lcd(0x27, 16, 2);  // LCD with I2C address 0x27
RTC_DS3231 rtc;
Servo dispenserServo;

const int buttonSetHour = 2;
const int buttonSetMinute = 3;
const int buttonConfirmTime = 4;
const int buzzerPin = 6;
const int servoPin = 9;

int setHour = 8;  // Default hour for pill dispensing
int setMinute = 0; // Default minute for pill dispensing
bool alarmSet = false;

void setup() {
  lcd.begin();
  rtc.begin();
  dispenserServo.attach(servoPin);
  pinMode(buzzerPin, OUTPUT);
  pinMode(buttonSetHour, INPUT_PULLUP);
  pinMode(buttonSetMinute, INPUT_PULLUP);
  pinMode(buttonConfirmTime, INPUT_PULLUP);

  lcd.print("Smart Pill Dispenser");
  delay(2000);
  lcd.clear();
}

void loop() {
  DateTime now = rtc.now();
 
  // Display current time
  lcd.setCursor(0, 0);
  lcd.print("Time: ");
  lcd.print(now.hour());
  lcd.print(":");
  lcd.print(now.minute());
  lcd.print(":");
  lcd.print(now.second());
 
  // Check if it's time to dispense pill
  if (now.hour() == setHour && now.minute() == setMinute && !alarmSet) {
    dispensePill();
    alarmSet = true;  // Prevents re-triggering within the same minute
  }

  if (now.minute() != setMinute) alarmSet = false;  // Reset alarm after a minute
 
  // Setting time with buttons
  if (digitalRead(buttonSetHour) == LOW) {
    setHour = (setHour + 1) % 24;
    delay(200);  // Debounce delay
  }
  if (digitalRead(buttonSetMinute) == LOW) {
    setMinute = (setMinute + 1) % 60;
    delay(200);
  }
  if (digitalRead(buttonConfirmTime) == LOW) {
    lcd.setCursor(0, 1);
    lcd.print("Set: ");
    lcd.print(setHour);
    lcd.print(":");
    lcd.print(setMinute);
    delay(500);
  }
}

void dispensePill() {
  lcd.setCursor(0, 1);
  lcd.print("Dispensing Pill!");
  tone(buzzerPin, 1000);  // Sound buzzer
  dispenserServo.write(90);  // Move servo to release pills
  delay(1000);  // Wait for pill to drop
  dispenserServo.write(0);  // Return servo to original position
  noTone(buzzerPin);
}

Applications

  • Elderly patient medication management

  • Hospital and clinic automated pill dispensing

  • Home healthcare monitoring systems

  • Smart medical device prototypes

  • IoT-based health reminder systems

  • Embedded healthcare automation projects

 

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  5. Arduino-Based Automatic Pill Dispenser Machine with LCD Display, Servo Motor and Buzzer Reminder

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