The Pill Dispenser 1.0

Automatic pill dispenser set for certain time intervals, with function for reminding to replace pills and buzzer.

IntermediateShowcase (no instructions)482
The Pill Dispenser 1.0

Things used in this project

Hardware components

Arduino Leonardo
Arduino Leonardo
×1
Grove - 12-Channel Capacitive Touch Keypad (ATtiny1616)
Seeed Studio Grove - 12-Channel Capacitive Touch Keypad (ATtiny1616)
×1
Alphanumeric LCD, 16 x 2
Alphanumeric LCD, 16 x 2
×1
5 mm LED: Red
5 mm LED: Red
×3
Resistor 220 ohm
Resistor 220 ohm
×4
Elegoo Positional Micro Servo
×3
Buzzer, Piezo
Buzzer, Piezo
×1
Elegoo Quad OR Gate
×1

Software apps and online services

Tinkercad
Autodesk Tinkercad

Story

Read more

Schematics

Mechanics Image

Image showing how the smint dispenser and micro servers work to dispense the "pills"

Video

Video of input, pill dispensing and LED lights in action.

Circuit Diagram

Diagram of our circuit

Code

Code for the pill dispenser

C/C++
#include <Keypad.h>
#include <LiquidCrystal.h>
#include <Servo.h>

Servo servoA;
Servo servoB;
Servo servoC;

int led1 = 0;
int led2 = 1;
int led3 = 2;

LiquidCrystal lcd(A0, A1, A2, A3, A4, A5);

const byte ROWS =4;
const byte COLS =4;
char hexaKeys[ROWS][COLS] ={
  {'1','2','3','A'},
  {'4','5','6','B'},
  {'7','8','9','C'},
  {'*','0','#','D'}
};
byte rowPins[ROWS] ={10,9,8,7};
byte colPins[COLS] ={6,5,4,3}; 

Keypad Tastenfeld=Keypad(
  makeKeymap(hexaKeys),rowPins,colPins,ROWS,COLS);
  
char InputA;
char InputB;
int C_per;
int A_per;
int B_per;
bool flag=true;
long A_times[10] = {};
long B_times[10] = {};
long C_times[10] = {};
int PillA_amt = 100;
int PillB_amt = 100;
int PillC_amt = 100;
long counter = 0;
long seconds;
long minutes;
long hours;

long set_a_time(String prompt = "Enter Time:"){
  lcd.clear();
  String time = "";
  String eingabe;
  char Taste;
  long return_value;
  bool first = true;
  //SET THE TIME
  lcd.print(prompt);
  lcd.setCursor(0, 1);
  lcd.print("18:30 as 1830!");
  lcd.setCursor(0, 0);
  //loop until he entered a time
  while(time == "") {
    flag=true;
    eingabe = "";
    lcd.print(prompt);
    lcd.setCursor(0, 1);
    //loop until there are 4 key inputs
    for(int i = 0; i < 4;){
      Taste = Tastenfeld.getKey();
      //If key is pressed, check if it is the first key 
      //and clear the lcd if thats the case
      if(Taste){
        if(first){
          lcd.print("               ");
          lcd.setCursor(0, 1);
          first = false;
        }
        lcd.print(Taste);
        eingabe += Taste;
        i++;
      }
    }
    lcd.clear();
    lcd.setCursor(0,0);
    long timing = eingabe.toInt();
    String minute_str = eingabe.substring(2,4);
    String hour_str = eingabe.substring(0,2);
    long hour_check = hour_str.toInt();
    long minute_check = minute_str.toInt();
    return_value = hour_check*3600 + minute_check*60;
    //check if the time is valid
    if(timing<2401&&minute_check<60){
      //if it is ask user to save time
      lcd.print("Save time with *");
      lcd.setCursor(0,1);
      if(hour_check<10){
        lcd.print(0);
      }
      lcd.print(hour_check);
      lcd.print(":");
      if(minute_check<10){
        lcd.print(0);
      }
      lcd.print(minute_check);
      while(flag) {
        Taste = Tastenfeld.getKey();
        if(Taste) {
          if(Taste == '*') {
             lcd.clear();
             lcd.setCursor(0,0);
             lcd.print("Time saved");
             delay(1000);
             lcd.clear();
             time = eingabe;
             flag=false;
          }//closes if(Taste == '*')
          else if(Taste == '#') {
            time ="";
            lcd.clear();
            lcd.setCursor(0,0);
            flag=false;
          }//closes else if ()
        }//closes if(Taste)
      }//closes while(flag)
    }//closes if(timing<2401)
    else{
      time ="";
      lcd.clear();
      lcd.setCursor(0,0);
    }//closes else
  }//closes while(time == "")
  return(return_value);
}

void setup() {
  servoA.write(0);
  servoB.write(0);
  servoC.write(0);
  pinMode(led1, OUTPUT);
  pinMode(led2, OUTPUT);
  pinMode(led3, OUTPUT);
  // put your setup code here, to run once:
  // set up the LCD's number of columns and rows:
  lcd.begin(16, 2);
  // set up all the LEDs as OUTPUT
//Set the pill timings
  delay(10);
  lcd.setCursor(0,0);    
  lcd.print("How often do");
  lcd.setCursor(0,1);
  lcd.print("you take Pill A?");
  for(int i=0;i<3;){
    InputA = Tastenfeld.getKey();
    lcd.setCursor(14,1);
    if(i==2 && InputA){
      C_per = InputA - 48;
      i++;
    }
    if(i==1 && InputA){
      B_per = InputA - 48;
      lcd.print("C?");
      i++;
    }
    if(i==0 && InputA){
      A_per = InputA - 48;
      lcd.print("B?");
      i++;
    }     
  }

  lcd.clear();
  for(int i = 0;i<A_per;i++){
    A_times[i] = set_a_time("Pill A) "+String(i+1)+". time.");
  }
  for(int i = 0;i<B_per;i++){
    B_times[i] = set_a_time("Pill B) "+String(i+1)+". time.");
  }
  for(int i = 0;i<C_per;i++){
    C_times[i] = set_a_time("Pill C) "+String(i+1)+". time.");
  }
  lcd.setCursor(0,0);    
  lcd.print("How many Pill A");
  lcd.setCursor(0,1);
  lcd.print("did you put in?");
  for(int i=0;i<3;i++){
    bool confirmed = true;
    bool fir = true;
    String number = "";
    while(confirmed){
      InputB = Tastenfeld.getKey();
      if(InputB){
        if(fir){
          lcd.clear();
          lcd.print("Confirm with *");
          lcd.setCursor(0,1);
          fir=false;
        }
        lcd.print(InputB);
        number+=InputB;
        if(i==2 && InputB == '*'){
          PillC_amt = number.toInt();
          confirmed=false;
        }
        if(i==1 && InputB == '*'){
          PillB_amt = number.toInt();
          lcd.clear();
          lcd.setCursor(0,0);    
          lcd.print("How many Pill C");
          lcd.setCursor(0,1);
          lcd.print("did you put in?");
          confirmed=false;
        }
        if(i==0 && InputB == '*'){
          PillA_amt = number.toInt();
          lcd.clear();
          lcd.setCursor(0,0);    
          lcd.print("How many Pill B");
          lcd.setCursor(0,1);
          lcd.print("did you put in?");
          confirmed=false;
        }  
      }
    }
  }
  lcd.clear();
  counter = set_a_time();
  lcd.clear();
}



void loop() {
  counter = counter+1;
  seconds = counter;
  hours = seconds/3600;
  seconds = seconds%3600;
  minutes = seconds/60;
  seconds = seconds%60;
  delay(1000);
  lcd.setCursor(4,0);
  if(hours<10){
    lcd.print(0);       
  }
  lcd.print(hours);
  lcd.print(":");
  
  if(minutes<10){
    lcd.print(0);
  }
  lcd.print(minutes);
  lcd.print(":");
  
  if(seconds<10){
    lcd.print(0);
  }
  lcd.print(seconds);
  lcd.print("    ");
  lcd.setCursor(0,1);
  if(PillA_amt <= 10){
    digitalWrite(led1, HIGH);
  }
  if(PillB_amt <= 10){
    digitalWrite(led2, HIGH);
  }
  if(PillC_amt <= 10){
    digitalWrite(led3, HIGH);
  }
  for(int i = 0; i<A_per; i++){
    if(A_times[i] == counter){
      servoA.attach(11); 
      servoA.write(180);
      delay(2000);
      servoA.write(90);
      delay(2000);
      PillA_amt--;
      servoA.detach();
    }
  }   
  for(int i = 0; i<B_per; i++){
    if(B_times[i] == counter){      
      servoB.attach(12); 
      servoB.write(180);
      delay(2000);
      servoB.write(90);
      delay(2000);
      PillB_amt--;
      servoB.detach(); 
    }
  }  
  for(int i = 0; i<C_per; i++){
    if(C_times[i] == counter){
      servoC.attach(13);
      servoC.write(180);
      delay(2000);
      servoC.write(0);
      delay(2000);
      PillC_amt--;
      servoC.detach();
    }
  }  
}
/*
#include <Servo.h>
Servo myservo;
Servo myservo2;
Servo myservo3;
int pos = 0;    

void setup() {
  myservo.attach(11); 
  myservo2.attach(12); 
  myservo3.attach(13); 
}

void loop() {
  for (pos = 0; pos <= 180; pos += 1) { 
    // in steps of 1 degree
    myservo.write(pos);  
    myservo2.write(pos);
    myservo3.write(pos);
    delay(15);                  
  }
  for (pos = 180; pos >= 0; pos -= 1) {
    myservo.write(pos);  
    myservo2.write(pos);
    myservo3.write(pos);
    delay(15);                     
  }
}
*/

Credits

mirandadrummond

mirandadrummond

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maudhelenhovland

maudhelenhovland

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johannesmichalke

johannesmichalke

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