I tried making Project 3 from the Arduino starter kit projects book.
but when I uploaded the code and opened the serial monitor is said this: sensor value: 604, Volts: 2.95, degrees C: 244.92.
and when I looked at the arduino the plastic on the bread board was melting and the top of the TMP36 sensor was super hot.
the connections on the board are the exact same as in the book and I unplugged everything and replugged everything the right way (like it also was before), and it still got super hot.
My code looks also the same as in the book:
const int sensorPin = A0;
const float baselineTemp = 20.0;
void setup() {
// put your setup code here, to run once:
Serial.begin(9600); // open a serial port
for(int pinNumber = 2; pinNumber<5; pinNumber++){
pinMode(pinNumber, OUTPUT);
digitalWrite(pinNumber, LOW);
}
}
void loop() {
// put your main code here, to run repeatedly:
int sensorVal = analogRead(sensorPin);
Serial.print("sensor value: ");
Serial.print(sensorVal);
// convert the ADC reding to voltage
float voltage = (sensorVal/1024.0) * 5.0;
Serial.print(", Volts: ");
Serial.print(voltage);
Serial.print(", degrees C: ");
// convert the voltage to temperature in degrees
float temperature = (voltage - .5) * 100;
Serial.println(temperature);
if(temperature < baselineTemp){
digitalWrite(2, LOW);
digitalWrite(3, LOW);
digitalWrite(4, LOW);
}
else if(temperature >= baselineTemp+2 && temperature < baselineTemp+4){
digitalWrite(2, HIGH);
digitalWrite(3, LOW);
digitalWrite(4, LOW);
}
else if(temperature >= baselineTemp+4 && temperature < baselineTemp+6){
digitalWrite(2, HIGH);
digitalWrite(3, HIGH);
digitalWrite(4, LOW);
}
else if(temperature >= baselineTemp+6){
digitalWrite(2, HIGH);
digitalWrite(3, HIGH);
digitalWrite(4, HIGH);
}
delay(1);
}
so I really dont know what I did wrong here
