YANTRONIX - Blog by Sanskar ChaturvediYANTRONIX - Blog by Sanskar Chaturvedihttps://www.yantronix.in/blogs/author/sanskar-chaturvediWed, 08 Apr 2026 05:50:33 +0530http://zoho.com/sites/<![CDATA[Enter your post title]]>https://www.yantronix.in/blogs/post/Smart-Parking-System-using-Arduino-and-LCD-DisplayThe Smart Parking System uses an Arduino, ultrasonic sensors, and LCD display to detect vehicle presence and show available parking slots in real time. It improves parking efficiency, reduces manual effort, and can be upgraded with IoT features for smart city applications.]]>

The face of the moon was in shadow

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]]>Sun, 19 Oct 2025 00:51:56 +0530<![CDATA[Enter your post title]]>https://www.yantronix.in/blogs/post/Touchless-Water-Dispenser-using-ArduinoThe Touchless Water Dispenser utilizes an Arduino, an IR sensor, and a relay to dispense water automatically when a hand is detected. It ensures hygiene and saves water by providing a contact-free operation. Ideal for homes, offices, hospitals, and public places.]]>

The face of the moon was in shadow

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]]>Sat, 18 Oct 2025 13:53:43 +0530<![CDATA[Smart Temperature Detection System with LCD Display using Arduino]]>https://www.yantronix.in/blogs/post/Smart-Temperature-Detection-System-with-LCD-Display-using-ArduinoSmart Temperature Detection System using Arduino measures real-time temperature with an LM35 sensor and displays it on a 16x2 LCD. A buzzer alerts when temperature exceeds a set limit. Ideal for home, industrial, and IoT applications with scope for cloud-based upgrades.]]>

Smart Temperature Detection System with LCD Display using Arduino

Objective:

To design a smart temperature monitoring system that measures real-time temperature using a digital sensor and displays it on an LCD screen. The system can also trigger alerts if the temperature exceeds a set threshold.

Components Required:

  1. Arduino Uno – Main microcontroller board

  2. LM35 / DHT11 / DS18B20 Temperature Sensor – For temperature measurement

  3. 16x2 LCD Display – To show temperature readings

  4. 10kΩ Potentiometer – For LCD contrast adjustment

  5. Buzzer (optional) – For over-temperature alert

  6. LED (optional) – To indicate high temperature

  7. Jumper Wires

  8. Breadboard

  9. USB Cable – For power and programming

Circuit Connections:

If using LM35 Sensor:

  • Vout → Arduino A0

  • VCC → Arduino 5V

  • GND → Arduino GND

LCD Display (16x2) Connections:

LCD PinArduino Pin
VSSGND
VDD5V
V0Middle pin of Potentiometer
RS12
RWGND
E11
D45
D54
D63
D72
A (LED+)5V (through 220Ω resistor)
K (LED−)GND

Working Principle:

  1. The LM35 sensor senses the surrounding temperature and provides an analog output proportional to the temperature.

  2. Arduino reads this analog voltage from the sensor.

  3. The voltage is converted into temperature in °C using the formula:

    Temperature(°C)= (analogValue∗5.0∗100)/1024

  4. The measured temperature is displayed on the LCD screen.

  5. If the temperature exceeds the threshold (say 35°C), the buzzer or LED turns ON to indicate a high temperature.

Arduino Code:
#include <LiquidCrystal.h>
LiquidCrystal lcd(12, 11, 5, 4, 3, 2);  // LCD pin configuration
int sensorPin = A0;  // LM35 connected to A0
int buzzer = 8;      // Buzzer or LED
float tempC;
void setup() {
  lcd.begin(16, 2);          // Initialize LCD
  pinMode(buzzer, OUTPUT);   // Set buzzer pin as output
  lcd.print("Temp Monitor");
  delay(2000);
  lcd.clear();
}
void loop() {
  int sensorValue = analogRead(sensorPin);
  tempC = (sensorValue * 5.0 * 100) / 1024.0; // Convert to Celsius
  lcd.setCursor(0, 0);
  lcd.print("Temp: ");
  lcd.print(tempC);
  lcd.print(" C   ");
  if (tempC > 35.0) {
    digitalWrite(buzzer, HIGH);
    lcd.setCursor(0, 1);
    lcd.print("HIGH TEMP ALERT!");
  } else {
    digitalWrite(buzzer, LOW);
    lcd.setCursor(0, 1);
    lcd.print("Status: Normal  ");
  }
  delay(1000);
}


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