Week #6 - Journal

The idea is to make ventilation fan controlled by temperature sensor, so when the Temp. is high than 25 c, the fan run automatically to reduce the heating degree.

This idea would help to keep on suitable work area without Air conditioning which save costs and save environment.

The implementation process come as STEPS:-

first prepare the components on the work area as below:

1. Avometer to measure the volt and current in the circuit.

2. LM35 Temp. sensor.

3. 5V fan.

4. Arduino uno board.

5. wire to connect all components together in the breadboard.

6. USB to Arduino connector to get the power

Second create the circle :

1. connect positive and ground from Arduino board to bread board.

2. put the LM35 on the bread board.

3. connect ML35 voc to the positive on the board and cround to ground on the board.

4. connect output LM35 to the Analog input on the board.

5. connect the fan t the positive and ground.

6. Upload the code to the Arduino board.

int val;

void setup() {

  // put your setup code here, to run once:

  pinMode(A1, INPUT);

  pinMode(6, OUTPUT);

  Serial.begin(9600);

}

void loop() {

  // put your main code here, to run repeatedly:

  val = analogRead(A1);

  float mv = (val / 1024.0) * 5000;

  float cel = (mv / 10);

  Serial.print("Temp = ");

  Serial.print(cel);

  Serial.print("c");

  Serial.println();

  if (cel > 25) {

    digitalWrite(6, HIGH);

  } else {

    digitalWrite(6, LOW);

  }

  delay(100);

}

The challenge was to change the Temp. sensor LM35 code than in tinkercar because in Tinkercad is different type of sensor.

So i write the code as i saw in lecture video by identify the value and then  divide value on 1024 as analog read data multiply 5000 then divided by 10 to return to Celecios degrees

 as Below code:-

val = analogRead(A1);

  float mv = (val / 1024.0) * 5000;

  float cel = (mv / 10);