Simple Circuits

 #include <Servo.h> #include <LiquidCrystal_I2C.h> #include <Keypad.h>   #ifndef PASSWORD_H #define PASSWORD_H   #define MAX_PASSWORD_LENGTH (20) #define STRING_TERMINATOR '\0' class Password { public: /** * @brief Construct object in memory, set all variables *  * @param pass  */ Password(char* pass); /** * @brief Set the password *  * @param pass  */ void set(char* pass); /** * @brief Evaluate a string, is it equal to the password? *  * @param pass  * @return true  * @return false  */ bool is(char* pass); /** * @brief Append a char to the guessed password *  * @param character  * @return true  * @return false  */ bool append(char character); /** * @brief Reset the guessed password, one can guess again *  */ void reset(); /** * @brief Is the current guessed password equal to the target password?...

 

  SMD Led 4v :-  https://amzn.to/3VsJ2O1 Charging Module C type Charger :-  https://amzn.to/4ctoxaj Single Battery Holder with 3.7v Battery :- https://amzn.to/3VrpyJS Switch :-  https://amzn.to/3Vq93xu

Arduino UNO:- https://amzn.to/3mhamzG Jumper Wires:- https://amzn.to/3GvV1SW   LCD Display With I2C Module:- https://amzn.to/41tQkCG Servo Motor:- https://amzn.to/3PqtfMt   5V Buzzer :- https://amzn.to/3KkLNK9 Keypad 4*4:- https://amzn.to/3VkzWmp Breadboard:- https://amzn.to/3Ulqv3G   Ultrasonic Sensor:- https://amzn.to/3sGsyFO IR Sensor:- https://amzn.to/3Kjn6P6 Seven Segment Display:- https://amzn.to/3wvFikq Temperature and Humidity Sensor:-  https://amzn.to/3IeZ1rb 5V Relay:- https://amzn.to/447ZpAs Sound Sensor:- https://amzn.to/3YFZASc Red LED:- https://amzn.to/44Oh29D MQ-2 Gas Sensor:- https://amzn.to/3KHEkFt 5V Buzzer and 9V Battery:- https://amzn.to/3KkLNK9 Green-Red LED:- https://amzn.to/3nWWawe 220 Ohm Resistor:- https://amzn.to/3ZPIUXv Hookup Wire:- https://amzn.to/3nWXBuK

Arduino UNO:- https://amzn.to/3mhamzG Jumper Wires:- https://amzn.to/3GvV1SW   LCD Display With I2C Module:- https://amzn.to/41tQkCG Servo Motor:- https://amzn.to/3PqtfMt   5V Buzzer :- https://amzn.to/3KkLNK9 Keypad 4*4:- https://amzn.to/3VkzWmp

Password Door Lock Using Arduino Password Door Lock Using Arduino In this project, we will create a Password Door Lock System using Arduino UNO, a 4x4 Keypad, LCD Display with I2C module, Servo Motor, Buzzer, and Jumper Wires. The system allows door access by entering a correct password via the keypad. If the correct password is entered, the servo motor will rotate and open the door by moving the latch, and a buzzer will beep to confirm access. If the entered password is incorrect, the servo remains locked and a different buzzer sound will indicate the wrong password. The LCD will display important system messages like welcome greetings, password entry status, access granted or denied. Working Principle The system operates using a 4-digit password (you can change the number of digits or the password itself by modifying the Arduino code). When the user enters the password through the keypa...

 

  Arduino UNO:- https://amzn.to/3mhamzG Jumper Wires:- https://amzn.to/3GvV1SW   Breadboard:- https://amzn.to/3Ulqv3G LCD Display With I2C Module:- https://amzn.to/41tQkCG Ultrasonic Sensor:- https://amzn.to/3sGsyFO

 #include <Wire.h>  #include <LiquidCrystal_I2C.h> LiquidCrystal_I2C lcd(0x27, 16, 2); #define trigPin A0 //Sensor Trig pin connected to Arduino pin A0 #define echoPin A1 //Sensor Echo pin connected to Arduino pin A1 long distanceInch; void setup() {   pinMode(trigPin, OUTPUT);   pinMode(echoPin, INPUT);   lcd.init();   lcd.backlight();   lcd.clear();   lcd.setCursor(0,0);   lcd.print("Simple  Circuits");   delay(2000);   lcd.clear();   lcd.setCursor(0,0);  //Set LCD cursor to upper left corner, column 0, row 0   lcd.print("Distance:");//Print Message on First Row   lcd.setCursor(0,1);   lcd.print("Distance:"); } void loop() {   long duration, distance;   digitalWrite(trigPin, LOW);   delayMicroseconds(2);   digitalWrite(trigPin, HIGH);   delayMicroseconds(10);   digitalWrite(trigPin, LOW);   duration = pulseIn(echoPin, HIGH);   distance = (duration/2)...

 

  Arduino UNO:- https://amzn.to/3mhamzG Jumper Wires:- https://amzn.to/3GvV1SW   Breadboard:- https://amzn.to/3Ulqv3G LCD Display With I2C Module:- https://amzn.to/41tQkCG Servo Motor:- https://amzn.to/3PqtfMt IR Sensor:- https://amzn.to/3Kjn6P6

 // Created by Simple Circuits  #include <Wire.h>  #include <LiquidCrystal_I2C.h> LiquidCrystal_I2C lcd(0x27,16,2);    #include <Servo.h>  Servo myservo; int IR1 = 2; int IR2 = 3; int Slot = 4;           //Total number of parking Slots int flag1 = 0; int flag2 = 0; void setup() {   Serial.begin(9600);      lcd.init(); //initialize the lcd     lcd.backlight(); //open the backlight     pinMode(IR1, INPUT); pinMode(IR2, INPUT);    myservo.attach(4); myservo.write(100); lcd.setCursor (0,0); lcd.print("     ARDUINO    "); lcd.setCursor (0,1); lcd.print(" PARKING SYSTEM "); delay (2000); lcd.clear();   } void loop(){  if(digitalRead (IR1) == LOW && flag1==0){ if(Slot>0){flag1=1; if(flag2==0){myservo.write(0); Slot = Slot-1;} }else{ lcd.setCursor (0,0); lcd.print("    SORRY :(    ");   lc...

 

                                                                   Arduino UNO:- https://amzn.to/3mhamzG Jumper Wires:- https://amzn.to/3GvV1SW   Breadboard:- https://amzn.to/3Ulqv3G  Seven Segment Display:- https://amzn.to/3wvFikq  

   //Created by Simple Circuits byte pin[] = {2, 3, 4, 5, 6, 7, 8, 9};//arduino pin array   int number[10][8] = {//number array   {0, 0, 0, 0, 0, 0, 0, 1},//0   {1, 1, 0, 0, 0, 1, 1, 1},//1   {0, 0, 1, 0, 0, 0, 1, 0},//2   {1, 0, 0, 0, 0, 0, 1, 0},//3   {1, 1, 0, 0, 0, 1, 0, 0},//4   {1, 0, 0, 0, 1, 0, 0, 0},//5   {0, 0, 0, 0, 1, 0, 0, 0},//6   {1, 1, 0, 0, 0, 0, 0, 1},//7   {0, 0, 0, 0, 0, 0, 0, 0},//8   {1, 1, 0, 0, 0, 0, 0, 0},//9 };   void setup() {   for (byte a = 0; a < 9; a++) {     pinMode(pin[a], OUTPUT);//define output pins   } }   void loop() {   for (int a = 0; a < 10; a++) {     for (int b = 0; b < 9; b++) {       digitalWrite(pin[b], number[a][b]);//display numbers     }     delay(1000);//delay   } }