Neil Juanillo

Temperature Monitoring & Alert System

Designed a thermistor-based temperature system that triggers an LED when exceeding 80°F.

Temperature Reading Circuit with Arduino:
We designed a temperature reading circuit using an Arduino to demonstrate practical applications of thermistor-based temperature sensing and digital output control.

Project Overview:
This project involves a temperature sensor circuit integrated with an Arduino microcontroller. We utilized a thermistor to measure ambient temperature. The Arduino then processes the analog signal from the thermistor, converts it to Fahrenheit, and displays the temperature reading. If the temperature exceeds 80°F, an LED connected to a digital pin is triggered, indicating a high-temperature alert.

Key Components:
- Arduino microcontroller
- Thermistor
- Resistors
- Breadboard and jumper wires
- LED

Key Features:
- Real-time temperature monitoring
- Temperature conversion from Celsius to Fahrenheit
- LED alert for temperatures exceeding 80°F

Arduino Code

            #define sensorPin A0
            int pin12 = 12;
            
            
            void setup() {
              // put your setup code here, to run once:
              pinMode(pin12, OUTPUT);
              Serial.begin(9600);
            }
            
            
            void loop() {
              // put your main code here, to run repeatedly:
              int reading = analogRead(sensorPin);
            
            
              float voltage = reading * (5.0 / 1024.0);
            
            
              float temperatureC = (voltage - 0.5) * 100;
            
            
              Serial.print("Temperature: ");
              Serial.print(temperatureC);
              Serial.print("\xC2\xB0");
              Serial.print("C | ");
            
            
              float temperatureF = (temperatureC * 9.0 / 5.0) + 32;
              Serial.print(temperatureF);
              Serial.print("\xC2\xB0");
              Serial.print("F");
            
            
              if(temperatureF > 78){
                digitalWrite(pin12, HIGH);
              } else if(temperatureF <= 78){
                digitalWrite(pin12, LOW);
              }
             Serial.println("\n");            
              delay(1000);
            }
            
        

Tinkercad Schematic