Author: projectbanao

const byte IR_PIN = 2;const byte ENA = 5, ENB = 6;const byte IN1 = 8, IN2 = 9, IN3 = 10, IN4 = 11;const bool BLACK_LEVEL = LOW; // Confirm on your sensorconst byte CORRECT_SPEED = 180; void motors(byte leftSpeed, byte rightSpeed) {  digitalWrite(IN1, leftSpeed > 0);  digitalWrite(IN2, LOW);  digitalWrite(IN3, rightSpeed > 0);  digitalWrite(IN4,…

#include <Servo.h> const byte L1 = 2, L2 = 3, R1 = 4, R2 = 7;const byte SERVO_PIN = 9, TRIG = 10, ECHO = 11;Servo scanner; void drive(int left, int right) {  digitalWrite(L1, left > 0);  digitalWrite(L2, left < 0);  digitalWrite(R1, right > 0); digitalWrite(R2, right < 0);} long distanceCm() {  digitalWrite(TRIG, LOW); delayMicroseconds(2); …

#include <Servo.h> const byte TRIG_PIN = 10, ECHO_PIN = 11;const byte SERVO_PIN = 9, LED_PIN = 7;const int CLOSED_ANGLE = 0, OPEN_ANGLE = 90;const int DETECT_CM = 20;const unsigned long CLEAR_DELAY_MS = 3000;Servo gate;bool isOpen = false;unsigned long clearSince = 0; long distanceCm() {  digitalWrite(TRIG_PIN, LOW); delayMicroseconds(2);  digitalWrite(TRIG_PIN, HIGH); delayMicroseconds(10);  digitalWrite(TRIG_PIN, LOW);  unsigned long us…

const byte sensorPin = A0, lampPin = 8;const int darkLevel = 350, brightLevel = 450;bool lampsOn = false;void setup() {  pinMode(lampPin, OUTPUT);  digitalWrite(lampPin, LOW);  Serial.begin(9600);}void loop() {  int light = analogRead(sensorPin);  Serial.println(light);  if (light < darkLevel) lampsOn = true;  if (light > brightLevel) lampsOn = false;  digitalWrite(lampPin, lampsOn ? HIGH : LOW);  delay(100);}

#include <Servo.h> const int RAIN_PIN = A0;const int SERVO_PIN = 9;const int WET_LIMIT = 550;  // Adjust after checking readingsconst int DRY_LIMIT = 650;  // Must be higher than WET_LIMITconst int OPEN_ANGLE = 0;const int CLOSED_ANGLE = 90; Servo coverServo;bool coverClosed = false;int wetCount = 0;int dryCount = 0; void setup() {  Serial.begin(9600);  coverServo.attach(SERVO_PIN);  coverServo.write(OPEN_ANGLE);}…

#include <Servo.h> const int TRIG_PIN = 9; const int ECHO_PIN = 10; const int MOISTURE_PIN = A0; const int SERVO_PIN = 6; const int DETECT_DISTANCE = 15;   // Distance in cm const int WET_THRESHOLD = 500;   // Adjust after testing // Most resistive moisture modules give lower readings when wet. // Change to…

const int SENSOR_PIN = A0;const int RELAY_PIN  = 7;const int DRY_LIMIT  = 650;   // Calibrate for your soil const int PUMP_ON  = LOW;     // Typical active-LOW relayconst int PUMP_OFF = HIGH; void setup() {  Serial.begin(9600);  pinMode(RELAY_PIN, OUTPUT);  digitalWrite(RELAY_PIN, PUMP_OFF);} void loop() {  int moistureValue = analogRead(SENSOR_PIN);  Serial.println(moistureValue);   if (moistureValue > DRY_LIMIT)…

#include <Wire.h>#include <LiquidCrystal_I2C.h> LiquidCrystal_I2C lcd(0x27, 16, 2); // Some LCDs use 0x3Fconst byte gasPin = A0;const byte buzzerPin = 8;const int alertThreshold = 400; // Example only; tune safely void setup() {pinMode(buzzerPin, OUTPUT);digitalWrite(buzzerPin, LOW);Serial.begin(9600);lcd.init();lcd.backlight();lcd.setCursor(0, 0);lcd.print(“Fire/Smoke Demo”);lcd.setCursor(0, 1);lcd.print(“Sensor warming”);delay(2000);} void loop() {int gasValue = analogRead(gasPin);bool alert = gasValue >= alertThreshold;Serial.println(gasValue); lcd.clear();lcd.setCursor(0, 0);lcd.print(alert ? “ALERT: CHECK AIR”…

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