Hey guys, i am brand new to all this but i bought a Inventors kit from robotshop.ca and i was following the guide for putting together temperature recording layout when i went to watch the temperature the numbers are this:
303.03
258.11
224.41
194.63
169.24
148.73
132.62
119.92
109.67
100.88
94.04
89.65
87.21
85.74
85.25
85.25
86.72
88.18
89.65
90.63
now i know for a fact that my temperature inside is currently sitting a 74.4f but this sensor doesn't dip below 80..... and it varies so much i have the feeling its broken or what i am looking at is not infact the temperature.... i just wanted to get some feedback as this is a critical area for me to learn (i plan on building a temperature sensor that controls a fan).
Heres the code it is running, again i am a complete noobie so i have no idea what to look for yet.
/* ---------------------------------------------------------
* | Arduino Experimentation Kit Example Code |
* | CIRC-10 .: Temperature
(TMP36 Temperature Sensor) |
* ---------------------------------------------------------
*
* A simple program to output the current temperature to the IDE's debug window
*
* For more details on this circuit:
http://tinyurl.com/c89tvd */
//TMP36 Pin Variables
int temperaturePin = 0; //the analog pin the TMP36's Vout (sense) pin is connected to
//the resolution is 10 mV / degree centigrade
//(500 mV offset) to make negative temperatures an option
/*
* setup() - this function runs once when you turn your Arduino on
* We initialize the serial connection with the computer
*/
void setup()
{
Serial.begin(9600); //Start the serial connection with the copmuter
//to view the result open the serial monitor
//last button beneath the file bar (looks like a box with an antenae)
}
void loop() // run over and over again
{
float temperature = getVoltage(temperaturePin); //getting the voltage reading from the temperature sensor
temperature = (temperature - .5) * 100; //converting from 10 mv per degree wit 500 mV offset
//to degrees ((volatge - 500mV) times 100)
Serial.println(temperature); //printing the result
delay(1000); //waiting a second
}
/*
* getVoltage() - returns the voltage on the analog input defined by
* pin
*/
float getVoltage(int pin){
return (analogRead(pin) * .004882814); //converting from a 0 to 1023 digital range
// to 0 to 5 volts (each 1 reading equals ~ 5 millivolts
}
