Hi all,
I'm trying to muddle my way through learning Arduino applications, so I bought the starter kit. Everything's been going swimmingly, but I can't seem to get the darn Love-o-meter to work. I can't figure out where the problem is. The TMP36 is correctly placed in my circuit, my coding looks fine, I'm getting a good temperature reading in the serial monitor, and I know the LED's are good (a direct connection lights them). The LED's just refuse to light when I try to use the temperature probe. Any tips?
My code is below, thanks in advance for any help provided
-Lotaxi
const int sensorPin = A0;
const float baselineTemp = 35;
void setup(){
Serial.begin(9600);
for(int pinNumber = 2; pinNumber>5; pinNumber++){
pinMode(pinNumber, OUTPUT);
digitalWrite(pinNumber, LOW);
}
}
void loop(){
int sensorVal = analogRead(sensorPin);
Serial.print("Sensor value: ");
Serial.print(sensorVal);
float voltage = (sensorVal/1024.0) * 5.0;
Serial.print(", Volts: ");
Serial.print(voltage);
Serial.print(", 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);
}