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This document describes a project to automate a fan using a temperature sensor and Arduino. The project uses an LM35 temperature sensor to measure temperature and send the readings to an Arduino Uno. The Arduino converts the analog readings to digital temperature values and displays them on an LCD. It also controls a relay that switches on a 12V DC fan when the temperature exceeds 37 degrees Celsius according to the code programmed into the Arduino.
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Project presentation
- 1. Project Title FAN AUTOMATION WITH TEMPERATURE SENSOR USING ARDUINO
- 2. About me: MUHAMMAD DANISH HASSAN BS(SE) COMSATS UNIVERSITY ISLAMABAD WAH CAMPUS
- 3. OBJECTIVE TEMPERATURE MEASURMENT DEGITAL DISPLAY OF TEMPERATURE USE OF ARDUINO TO DISPLAY TEMPERATURE FAN AUTOMATION
- 4. COMPONENT LM35 sensor. Arduino uno Computer. LCD 16x2. Variable Resistor 10K. 5V DC Relay. 12V DC Fan.
- 5. WORKING When sensor reads temperature from surrounding , it feeds the reading to analog input pin of Arduino. There is ADC in Arduino which converts the analog value into digital value and displays the temperature on LCD. The principle of LM35 working is that as the temperature increases, it sends the voltage accordingly to the Arduino for conversion. The formula is 10mV = 1C rise in
- 6. WORKING… Here we have put the conditional statement in the Arduino coding for fan switching. When temperature rises by 37C, the digital pin8 of Arduino becomes active and send some voltage to the dc relay. Then the DC relay amplifies the voltage to some value enough to operate the fan and feeds it to the fan and the fan turns on every time the pin8 is enabled.
- 7. CODING: #include<LiquidCrystal.h> LiquidCrystal lcd(12,11,5,4,3,2); const int A= 0; int FAN= 8; void setup() { Serial.begin(9600); lcd.begin(16,2); pinMode(FAN, OUTPUT); }
- 8. CODING… void loop() { int v = analogRead(A); float mV = (v / 1024.0) * 5000; float Celsius = mV / 10;
- 9. CODING… lcd.clear(); lcd.setCursor(0,0); lcd.print("CENTIGRADE="); lcd.print(celsius); lcd.print("C"); lcd.setCursor(0,1); lcd.print("FARENHEIT="); lcd.print((celsius * 9)/5 + 32); lcd.print("F"); delay(1000);
- 10. CODING… if (celsius >37) { digitalWrite(8, HIGH); } else digitalWrite(8, LOW); }
- 11. THANK YOU