Will this basic LED circuit work?

system · April 21, 2013, 2:53pm

I am trying to make a thermometer and each light will represent a small temperature range and will come on when the sensor reaches that designated temperature.

I only have a small kit which only includes the following resistors:

100R x 5
220R x 5
330R x4
1K x 5
10K x 5

As only one LED will be on at once, is it possible to connect all the LED's to one resistor which will be connected to ground. SEE IMAGE ATTACHMENT. I am a complete beginner so please explain as simply as possible! Thank you!

(I would hugely appreciate a corrected fritzing image of my circuit)

fungus · April 21, 2013, 3:14pm

CR123:
As only one LED will be on at once, is it possible to connect all the LED's to one resistor which will be connected to ground.

Yes.

system · April 21, 2013, 3:16pm

So will the circuit work? (see attachement) thanks

fungus · April 21, 2013, 3:18pm

CR123:
So will the circuit work? (see attachement) thanks

I don't see any reason why not.

Riva · April 21, 2013, 3:57pm

Just a small observation with your image. You have a wire bridging the GND to VCC on the breadboard power rails and the LED resistor is connected to the VCC rail. As your not running VCC voltages to the rails it will not cause a problem but it's not a good habit to get into.

system · April 21, 2013, 4:17pm

Oh yes, thank you!

system · April 21, 2013, 5:00pm

hmm, doesnt seem to be working. Ive wired it up as is in the attached screengrab. None of the lights are coming on. Here is the code I am using:

int analogPin = 0;
int readValue = 0;
int redOne = 13;
int redTwo = 12;
int redThree = 11;
int redFour = 10;
int yellowOne = 9;
int yellowTwo = 8;
int yellowThree = 7;
int yellowFour = 6;
int greenOne = 5;
int greenTwo = 4;
int greenThree = 3;
int greenFour = 2;

float temperature = 0;
float temperatureF = 0;
void setup() {
Serial.begin(9600);
}

void loop() {

readValue = analogRead(analogPin);
//Serial.println(readValue);
temperature = (readValue * 0.0049);
temperature = temperature * 100;
temperatureF = (temperature * 1.8) + 32;
Serial.print(temperature);
delay(1000);

if (temperature < 3)

{

digitalWrite(redOne,LOW);
digitalWrite(redTwo,LOW);
digitalWrite(redThree,LOW);
digitalWrite(redFour,LOW);
digitalWrite(yellowOne,LOW);
digitalWrite(yellowTwo,LOW);
digitalWrite(yellowThree,LOW);
digitalWrite(yellowFour,LOW);
digitalWrite(greenOne,LOW);
digitalWrite(greenTwo,LOW);
digitalWrite(greenThree,LOW);
digitalWrite(greenFour,HIGH);

delay(1000);
}

if (temperature <= 3 && temperature > 6)

{

digitalWrite(redOne,LOW);
digitalWrite(redTwo,LOW);
digitalWrite(redThree,LOW);
digitalWrite(redFour,LOW);
digitalWrite(yellowOne,LOW);
digitalWrite(yellowTwo,LOW);
digitalWrite(yellowThree,LOW);
digitalWrite(yellowFour,LOW);
digitalWrite(greenOne,LOW);
digitalWrite(greenTwo,LOW);
digitalWrite(greenThree,HIGH);
digitalWrite(greenFour,LOW);
}

if (temperature <= 6 && temperature > 9)

{

digitalWrite(redOne,LOW);
digitalWrite(redTwo,LOW);
digitalWrite(redThree,LOW);
digitalWrite(redFour,LOW);
digitalWrite(yellowOne,LOW);
digitalWrite(yellowTwo,LOW);
digitalWrite(yellowThree,LOW);
digitalWrite(yellowFour,LOW);
digitalWrite(greenOne,LOW);
digitalWrite(greenTwo,HIGH);
digitalWrite(greenThree,LOW);
digitalWrite(greenFour,LOW);
}

if (temperature <= 9 && temperature > 12)

{

digitalWrite(redOne,LOW);
digitalWrite(redTwo,LOW);
digitalWrite(redThree,LOW);
digitalWrite(redFour,LOW);
digitalWrite(yellowOne,LOW);
digitalWrite(yellowTwo,LOW);
digitalWrite(yellowThree,LOW);
digitalWrite(yellowFour,LOW);
digitalWrite(greenOne,HIGH);
digitalWrite(greenTwo,LOW);
digitalWrite(greenThree,LOW);
digitalWrite(greenFour,LOW);
}

if (temperature <= 12 && temperature > 15)

{

digitalWrite(redOne,LOW);
digitalWrite(redTwo,LOW);
digitalWrite(redThree,LOW);
digitalWrite(redFour,LOW);
digitalWrite(yellowOne,LOW);
digitalWrite(yellowTwo,LOW);
digitalWrite(yellowThree,LOW);
digitalWrite(yellowFour,HIGH);
digitalWrite(greenOne,LOW);
digitalWrite(greenTwo,LOW);
digitalWrite(greenThree,LOW);
digitalWrite(greenFour,LOW);
}

if (temperature <= 15 && temperature > 18)

{

digitalWrite(redOne,LOW);
digitalWrite(redTwo,LOW);
digitalWrite(redThree,LOW);
digitalWrite(redFour,LOW);
digitalWrite(yellowOne,LOW);
digitalWrite(yellowTwo,LOW);
digitalWrite(yellowThree,HIGH);
digitalWrite(yellowFour,LOW);
digitalWrite(greenOne,LOW);
digitalWrite(greenTwo,LOW);
digitalWrite(greenThree,LOW);
digitalWrite(greenFour,LOW);
}

if (temperature <= 18 && temperature > 21)

{

digitalWrite(redOne,LOW);
digitalWrite(redTwo,LOW);
digitalWrite(redThree,LOW);
digitalWrite(redFour,LOW);
digitalWrite(yellowOne,LOW);
digitalWrite(yellowTwo,HIGH);
digitalWrite(yellowThree,LOW);
digitalWrite(yellowFour,LOW);
digitalWrite(greenOne,LOW);
digitalWrite(greenTwo,LOW);
digitalWrite(greenThree,LOW);
digitalWrite(greenFour,LOW);
}

if (temperature <= 21 && temperature > 24)

{

digitalWrite(redOne,LOW);
digitalWrite(redTwo,LOW);
digitalWrite(redThree,LOW);
digitalWrite(redFour,LOW);
digitalWrite(yellowOne,HIGH);
digitalWrite(yellowTwo,LOW);
digitalWrite(yellowThree,LOW);
digitalWrite(yellowFour,LOW);
digitalWrite(greenOne,LOW);
digitalWrite(greenTwo,LOW);
digitalWrite(greenThree,LOW);
digitalWrite(greenFour,LOW);
}

if (temperature <= 24 && temperature > 27)

{

digitalWrite(redOne,LOW);
digitalWrite(redTwo,LOW);
digitalWrite(redThree,LOW);
digitalWrite(redFour,HIGH);
digitalWrite(yellowOne,LOW);
digitalWrite(yellowTwo,LOW);
digitalWrite(yellowThree,LOW);
digitalWrite(yellowFour,LOW);
digitalWrite(greenOne,LOW);
digitalWrite(greenTwo,LOW);
digitalWrite(greenThree,LOW);
digitalWrite(greenFour,LOW);
}

if (temperature <= 27 && temperature > 30)

{

digitalWrite(redOne,LOW);
digitalWrite(redTwo,LOW);
digitalWrite(redThree,HIGH);
digitalWrite(redFour,LOW);
digitalWrite(yellowOne,LOW);
digitalWrite(yellowTwo,LOW);
digitalWrite(yellowThree,LOW);
digitalWrite(yellowFour,LOW);
digitalWrite(greenOne,LOW);
digitalWrite(greenTwo,LOW);
digitalWrite(greenThree,LOW);
digitalWrite(greenFour,LOW);
}

if (temperature <= 30 && temperature > 33)

{

digitalWrite(redOne,LOW);
digitalWrite(redTwo,HIGH);
digitalWrite(redThree,LOW);
digitalWrite(redFour,LOW);
digitalWrite(yellowOne,LOW);
digitalWrite(yellowTwo,LOW);
digitalWrite(yellowThree,LOW);
digitalWrite(yellowFour,LOW);
digitalWrite(greenOne,LOW);
digitalWrite(greenTwo,LOW);
digitalWrite(greenThree,LOW);
digitalWrite(greenFour,LOW);
}

if (temperature <= 33 && temperature > 36)

{

digitalWrite(redOne,HIGH);
digitalWrite(redTwo,LOW);
digitalWrite(redThree,LOW);
digitalWrite(redFour,LOW);
digitalWrite(yellowOne,LOW);
digitalWrite(yellowTwo,LOW);
digitalWrite(yellowThree,LOW);
digitalWrite(yellowFour,LOW);
digitalWrite(greenOne,LOW);
digitalWrite(greenTwo,LOW);
digitalWrite(greenThree,LOW);
digitalWrite(greenFour,LOW);
}

}

fungus · April 21, 2013, 5:36pm

I don't see any pinMode() function calls in there...

system · April 21, 2013, 5:45pm

Where in the code would they go? I've only just started arduino and electronics this week so im unsure. Would the code below be correct?

void setup() {
Serial.begin(9600);
pinMode(2,OUTPUT);
pinMode(3,OUTPUT);
pinMode(4,OUTPUT);
pinMode(5,OUTPUT);
pinMode(6,OUTPUT);
pinMode(7,OUTPUT);
pinMode(8,OUTPUT);
pinMode(9,OUTPUT);
pinMode(10,OUTPUT);
pinMode(11,OUTPUT);
pinMode(12,OUTPUT);
pinMode(13,OUTPUT);
}

Thank you

runaway_pancake · April 21, 2013, 6:01pm

You have a lot of statements like this:
if (temperature <= 12 && temperature > 15)

Logically, "temperature" cannot be less than or equal to 12 and greater than 15.

You're trying to do this thing all at once.
How about trying to get one LED to go on when the temperature is inside one particular range and build from that?

system · April 21, 2013, 6:09pm

Oh yes my mistake.
I have managed this with 4 LEDs but that was using a resistor for each LED rather than one for all of them.

system · April 21, 2013, 6:16pm

Here's where i'm at, Still no light though.

int analogPin = 0;
int readValue = 0;
int redOne = 13;
int redTwo = 12;
int redThree = 11;
int redFour = 10;
int yellowOne = 9;
int yellowTwo = 8;
int yellowThree = 7;
int yellowFour = 6;
int greenOne = 5;
int greenTwo = 4;
int greenThree = 3;
int greenFour = 2;

float temperature = 0;
float temperatureF = 0;
void setup() {
Serial.begin(9600);
pinMode(2,OUTPUT);
pinMode(3,OUTPUT);
pinMode(4,OUTPUT);
pinMode(5,OUTPUT);
pinMode(6,OUTPUT);
pinMode(7,OUTPUT);
pinMode(8,OUTPUT);
pinMode(9,OUTPUT);
pinMode(10,OUTPUT);
pinMode(11,OUTPUT);
pinMode(12,OUTPUT);
pinMode(13,OUTPUT);
}

void loop() {

readValue = analogRead(analogPin);
//Serial.println(readValue);
temperature = (readValue * 0.0049);
temperature = temperature * 100;
temperatureF = (temperature * 1.8) + 32;
Serial.print(temperature);
delay(1000);

if (temperature < 3)

{

digitalWrite(redOne,LOW);
digitalWrite(redTwo,LOW);
digitalWrite(redThree,LOW);
digitalWrite(redFour,LOW);
digitalWrite(yellowOne,LOW);
digitalWrite(yellowTwo,LOW);
digitalWrite(yellowThree,LOW);
digitalWrite(yellowFour,LOW);
digitalWrite(greenOne,LOW);
digitalWrite(greenTwo,LOW);
digitalWrite(greenThree,LOW);
digitalWrite(greenFour,HIGH);

delay(1000);
}

if (temperature >= 3 && temperature < 6)

{

digitalWrite(redOne,LOW);
digitalWrite(redTwo,LOW);
digitalWrite(redThree,LOW);
digitalWrite(redFour,LOW);
digitalWrite(yellowOne,LOW);
digitalWrite(yellowTwo,LOW);
digitalWrite(yellowThree,LOW);
digitalWrite(yellowFour,LOW);
digitalWrite(greenOne,LOW);
digitalWrite(greenTwo,LOW);
digitalWrite(greenThree,HIGH);
digitalWrite(greenFour,LOW);
}

if (temperature >= 6 && temperature < 9)

{

digitalWrite(redOne,LOW);
digitalWrite(redTwo,LOW);
digitalWrite(redThree,LOW);
digitalWrite(redFour,LOW);
digitalWrite(yellowOne,LOW);
digitalWrite(yellowTwo,LOW);
digitalWrite(yellowThree,LOW);
digitalWrite(yellowFour,LOW);
digitalWrite(greenOne,LOW);
digitalWrite(greenTwo,HIGH);
digitalWrite(greenThree,LOW);
digitalWrite(greenFour,LOW);
}

if (temperature >= 9 && temperature < 12)

{

digitalWrite(redOne,LOW);
digitalWrite(redTwo,LOW);
digitalWrite(redThree,LOW);
digitalWrite(redFour,LOW);
digitalWrite(yellowOne,LOW);
digitalWrite(yellowTwo,LOW);
digitalWrite(yellowThree,LOW);
digitalWrite(yellowFour,LOW);
digitalWrite(greenOne,HIGH);
digitalWrite(greenTwo,LOW);
digitalWrite(greenThree,LOW);
digitalWrite(greenFour,LOW);
}

if (temperature >= 12 && temperature < 15)

{

digitalWrite(redOne,LOW);
digitalWrite(redTwo,LOW);
digitalWrite(redThree,LOW);
digitalWrite(redFour,LOW);
digitalWrite(yellowOne,LOW);
digitalWrite(yellowTwo,LOW);
digitalWrite(yellowThree,LOW);
digitalWrite(yellowFour,HIGH);
digitalWrite(greenOne,LOW);
digitalWrite(greenTwo,LOW);
digitalWrite(greenThree,LOW);
digitalWrite(greenFour,LOW);
}

if (temperature >= 15 && temperature < 18)

{

digitalWrite(redOne,LOW);
digitalWrite(redTwo,LOW);
digitalWrite(redThree,LOW);
digitalWrite(redFour,LOW);
digitalWrite(yellowOne,LOW);
digitalWrite(yellowTwo,LOW);
digitalWrite(yellowThree,HIGH);
digitalWrite(yellowFour,LOW);
digitalWrite(greenOne,LOW);
digitalWrite(greenTwo,LOW);
digitalWrite(greenThree,LOW);
digitalWrite(greenFour,LOW);
}

if (temperature >= 18 && temperature < 21)

{

digitalWrite(redOne,LOW);
digitalWrite(redTwo,LOW);
digitalWrite(redThree,LOW);
digitalWrite(redFour,LOW);
digitalWrite(yellowOne,LOW);
digitalWrite(yellowTwo,HIGH);
digitalWrite(yellowThree,LOW);
digitalWrite(yellowFour,LOW);
digitalWrite(greenOne,LOW);
digitalWrite(greenTwo,LOW);
digitalWrite(greenThree,LOW);
digitalWrite(greenFour,LOW);
}

if (temperature >= 21 && temperature < 24)

{

digitalWrite(redOne,LOW);
digitalWrite(redTwo,LOW);
digitalWrite(redThree,LOW);
digitalWrite(redFour,LOW);
digitalWrite(yellowOne,HIGH);
digitalWrite(yellowTwo,LOW);
digitalWrite(yellowThree,LOW);
digitalWrite(yellowFour,LOW);
digitalWrite(greenOne,LOW);
digitalWrite(greenTwo,LOW);
digitalWrite(greenThree,LOW);
digitalWrite(greenFour,LOW);
}

if (temperature >= 24 && temperature < 27)

{

digitalWrite(redOne,LOW);
digitalWrite(redTwo,LOW);
digitalWrite(redThree,LOW);
digitalWrite(redFour,HIGH);
digitalWrite(yellowOne,LOW);
digitalWrite(yellowTwo,LOW);
digitalWrite(yellowThree,LOW);
digitalWrite(yellowFour,LOW);
digitalWrite(greenOne,LOW);
digitalWrite(greenTwo,LOW);
digitalWrite(greenThree,LOW);
digitalWrite(greenFour,LOW);
}

if (temperature >= 27 && temperature < 30)

{

digitalWrite(redOne,LOW);
digitalWrite(redTwo,LOW);
digitalWrite(redThree,HIGH);
digitalWrite(redFour,LOW);
digitalWrite(yellowOne,LOW);
digitalWrite(yellowTwo,LOW);
digitalWrite(yellowThree,LOW);
digitalWrite(yellowFour,LOW);
digitalWrite(greenOne,LOW);
digitalWrite(greenTwo,LOW);
digitalWrite(greenThree,LOW);
digitalWrite(greenFour,LOW);
}

if (temperature >= 30 && temperature < 33)

{

digitalWrite(redOne,LOW);
digitalWrite(redTwo,HIGH);
digitalWrite(redThree,LOW);
digitalWrite(redFour,LOW);
digitalWrite(yellowOne,LOW);
digitalWrite(yellowTwo,LOW);
digitalWrite(yellowThree,LOW);
digitalWrite(yellowFour,LOW);
digitalWrite(greenOne,LOW);
digitalWrite(greenTwo,LOW);
digitalWrite(greenThree,LOW);
digitalWrite(greenFour,LOW);
}

if (temperature >= 33 && temperature < 36)

{

digitalWrite(redOne,HIGH);
digitalWrite(redTwo,LOW);
digitalWrite(redThree,LOW);
digitalWrite(redFour,LOW);
digitalWrite(yellowOne,LOW);
digitalWrite(yellowTwo,LOW);
digitalWrite(yellowThree,LOW);
digitalWrite(yellowFour,LOW);
digitalWrite(greenOne,LOW);
digitalWrite(greenTwo,LOW);
digitalWrite(greenThree,LOW);
digitalWrite(greenFour,LOW);
}

}

runaway_pancake · April 21, 2013, 6:26pm

You need to press the # button and place your code within the brackets
[ code ] paste your code inside [ /code ]

You have (supposedly):

void loop() 
{ 
  readValue = analogRead(analogPin);
  //Serial.println(readValue);
  temperature = (readValue * 0.0049); 
  temperature = temperature * 100; 
  temperatureF = (temperature * 1. + 32;
  Serial.print(temperature); 
  delay(1000);

Does it print "temperature" in the Serial Monitor?
Are the results correct?

system · April 21, 2013, 6:31pm

Yes it does, I am unsure if they are correct as I dont have any way to compare it. Im indoors in a heated room and the results are are around 19 degrees C up to 25 degrees C which sound about right as it is pretty warm.

runaway_pancake · April 21, 2013, 6:37pm

The code that you're showing here is not what you're using.
Highlight and Copy your code from the Arduino IDE
Click the # button here and past your Copied code between the "code tags"

system · April 21, 2013, 6:45pm

int analogPin = 0; 
int readValue = 0; 
int redOne = 13;
int redTwo = 12;
int redThree = 11;
int redFour = 10;
int yellowOne = 9;
int yellowTwo = 8;
int yellowThree = 7;
int yellowFour = 6;
int greenOne = 5;
int greenTwo = 4;
int greenThree = 3;
int greenFour = 2;

float temperature = 0; 
float temperatureF = 0;
void setup() { 
 Serial.begin(9600); 
pinMode(2,OUTPUT);
pinMode(3,OUTPUT);
pinMode(4,OUTPUT);
pinMode(5,OUTPUT);
pinMode(6,OUTPUT);
pinMode(7,OUTPUT);
pinMode(8,OUTPUT);
pinMode(9,OUTPUT);
pinMode(10,OUTPUT);
pinMode(11,OUTPUT);
pinMode(12,OUTPUT);
pinMode(13,OUTPUT);
}

void loop() { 
  

  readValue = analogRead(analogPin);
  //Serial.println(readValue);
  temperature = (readValue * 0.0049); 
  temperature = temperature * 100; 
  temperatureF = (temperature * 1.8) + 32;
  Serial.print(temperature); 
  delay(1000);

  if (temperature < 3) 
  
{
  
  digitalWrite(redOne,LOW);
  digitalWrite(redTwo,LOW);
  digitalWrite(redThree,LOW);
  digitalWrite(redFour,LOW);
  digitalWrite(yellowOne,LOW);
  digitalWrite(yellowTwo,LOW);
  digitalWrite(yellowThree,LOW);
  digitalWrite(yellowFour,LOW);
  digitalWrite(greenOne,LOW);
  digitalWrite(greenTwo,LOW);
  digitalWrite(greenThree,LOW);
  digitalWrite(greenFour,HIGH);
  
  delay(1000);
}

  if (temperature >= 3 && temperature < 6) 
  
{
  
  digitalWrite(redOne,LOW);
  digitalWrite(redTwo,LOW);
  digitalWrite(redThree,LOW);
  digitalWrite(redFour,LOW);
  digitalWrite(yellowOne,LOW);
  digitalWrite(yellowTwo,LOW);
  digitalWrite(yellowThree,LOW);
  digitalWrite(yellowFour,LOW);
  digitalWrite(greenOne,LOW);
  digitalWrite(greenTwo,LOW);
  digitalWrite(greenThree,HIGH);
  digitalWrite(greenFour,LOW);
}

if (temperature >= 6 && temperature < 9) 
  
{
  
  digitalWrite(redOne,LOW);
  digitalWrite(redTwo,LOW);
  digitalWrite(redThree,LOW);
  digitalWrite(redFour,LOW);
  digitalWrite(yellowOne,LOW);
  digitalWrite(yellowTwo,LOW);
  digitalWrite(yellowThree,LOW);
  digitalWrite(yellowFour,LOW);
  digitalWrite(greenOne,LOW);
  digitalWrite(greenTwo,HIGH);
  digitalWrite(greenThree,LOW);
  digitalWrite(greenFour,LOW);
}

if (temperature >= 9 && temperature < 12) 
  
{
  
  digitalWrite(redOne,LOW);
  digitalWrite(redTwo,LOW);
  digitalWrite(redThree,LOW);
  digitalWrite(redFour,LOW);
  digitalWrite(yellowOne,LOW);
  digitalWrite(yellowTwo,LOW);
  digitalWrite(yellowThree,LOW);
  digitalWrite(yellowFour,LOW);
  digitalWrite(greenOne,HIGH);
  digitalWrite(greenTwo,LOW);
  digitalWrite(greenThree,LOW);
  digitalWrite(greenFour,LOW);
}

if (temperature >= 12 && temperature < 15) 
  
{
  
  digitalWrite(redOne,LOW);
  digitalWrite(redTwo,LOW);
  digitalWrite(redThree,LOW);
  digitalWrite(redFour,LOW);
  digitalWrite(yellowOne,LOW);
  digitalWrite(yellowTwo,LOW);
  digitalWrite(yellowThree,LOW);
  digitalWrite(yellowFour,HIGH);
  digitalWrite(greenOne,LOW);
  digitalWrite(greenTwo,LOW);
  digitalWrite(greenThree,LOW);
  digitalWrite(greenFour,LOW);
}

if (temperature >= 15 && temperature < 18) 
  
{
  
  digitalWrite(redOne,LOW);
  digitalWrite(redTwo,LOW);
  digitalWrite(redThree,LOW);
  digitalWrite(redFour,LOW);
  digitalWrite(yellowOne,LOW);
  digitalWrite(yellowTwo,LOW);
  digitalWrite(yellowThree,HIGH);
  digitalWrite(yellowFour,LOW);
  digitalWrite(greenOne,LOW);
  digitalWrite(greenTwo,LOW);
  digitalWrite(greenThree,LOW);
  digitalWrite(greenFour,LOW);
}

if (temperature >= 18 && temperature < 21) 
  
{
  
  digitalWrite(redOne,LOW);
  digitalWrite(redTwo,LOW);
  digitalWrite(redThree,LOW);
  digitalWrite(redFour,LOW);
  digitalWrite(yellowOne,LOW);
  digitalWrite(yellowTwo,HIGH);
  digitalWrite(yellowThree,LOW);
  digitalWrite(yellowFour,LOW);
  digitalWrite(greenOne,LOW);
  digitalWrite(greenTwo,LOW);
  digitalWrite(greenThree,LOW);
  digitalWrite(greenFour,LOW);
}

if (temperature >= 21 && temperature < 24) 
  
{
  
  digitalWrite(redOne,LOW);
  digitalWrite(redTwo,LOW);
  digitalWrite(redThree,LOW);
  digitalWrite(redFour,LOW);
  digitalWrite(yellowOne,HIGH);
  digitalWrite(yellowTwo,LOW);
  digitalWrite(yellowThree,LOW);
  digitalWrite(yellowFour,LOW);
  digitalWrite(greenOne,LOW);
  digitalWrite(greenTwo,LOW);
  digitalWrite(greenThree,LOW);
  digitalWrite(greenFour,LOW);
}

if (temperature >= 24 && temperature < 27) 
  
{
  
  digitalWrite(redOne,LOW);
  digitalWrite(redTwo,LOW);
  digitalWrite(redThree,LOW);
  digitalWrite(redFour,HIGH);
  digitalWrite(yellowOne,LOW);
  digitalWrite(yellowTwo,LOW);
  digitalWrite(yellowThree,LOW);
  digitalWrite(yellowFour,LOW);
  digitalWrite(greenOne,LOW);
  digitalWrite(greenTwo,LOW);
  digitalWrite(greenThree,LOW);
  digitalWrite(greenFour,LOW);
}

if (temperature >= 27 && temperature < 30) 
  
{
  
  digitalWrite(redOne,LOW);
  digitalWrite(redTwo,LOW);
  digitalWrite(redThree,HIGH);
  digitalWrite(redFour,LOW);
  digitalWrite(yellowOne,LOW);
  digitalWrite(yellowTwo,LOW);
  digitalWrite(yellowThree,LOW);
  digitalWrite(yellowFour,LOW);
  digitalWrite(greenOne,LOW);
  digitalWrite(greenTwo,LOW);
  digitalWrite(greenThree,LOW);
  digitalWrite(greenFour,LOW);
}

if (temperature >= 30 && temperature < 33) 
  
{
  
  digitalWrite(redOne,LOW);
  digitalWrite(redTwo,HIGH);
  digitalWrite(redThree,LOW);
  digitalWrite(redFour,LOW);
  digitalWrite(yellowOne,LOW);
  digitalWrite(yellowTwo,LOW);
  digitalWrite(yellowThree,LOW);
  digitalWrite(yellowFour,LOW);
  digitalWrite(greenOne,LOW);
  digitalWrite(greenTwo,LOW);
  digitalWrite(greenThree,LOW);
  digitalWrite(greenFour,LOW);
}

if (temperature >= 33 && temperature < 36) 
  
{
  
  digitalWrite(redOne,HIGH);
  digitalWrite(redTwo,LOW);
  digitalWrite(redThree,LOW);
  digitalWrite(redFour,LOW);
  digitalWrite(yellowOne,LOW);
  digitalWrite(yellowTwo,LOW);
  digitalWrite(yellowThree,LOW);
  digitalWrite(yellowFour,LOW);
  digitalWrite(greenOne,LOW);
  digitalWrite(greenTwo,LOW);
  digitalWrite(greenThree,LOW);
  digitalWrite(greenFour,LOW);
}

}

runaway_pancake · April 21, 2013, 7:28pm

Uploading...

byte index;
int readValue = 0; 
int redOne = 13;
int redTwo = 12;
int redThree = 11;
int redFour = 10;
int yellowOne = 9;
int yellowTwo = 8;
int yellowThree = 7;
int yellowFour = 6;
int greenOne = 5;
int greenTwo = 4;
int greenThree = 3;
int greenFour = 2;

float temperature = 0; 
float temperatureF = 0;
void setup() 
{ 
 Serial.begin(9600); 
 pinMode(2,OUTPUT);
 pinMode(3,OUTPUT);
 pinMode(4,OUTPUT);
 pinMode(5,OUTPUT);
 pinMode(6,OUTPUT);
 pinMode(7,OUTPUT);
 pinMode(8,OUTPUT);
 pinMode(9,OUTPUT);
 pinMode(10,OUTPUT);
 pinMode(11,OUTPUT);
 pinMode(12,OUTPUT);
 pinMode(13,OUTPUT);
 trialrun();
}

void loop() 
{ 
  readValue = analogRead(A0);
  //Serial.println(readValue);
  temperature = (readValue * 0.0049); 
  temperature = temperature * 100; 
  temperatureF = (temperature * 1.8) + 32;
  Serial.print(temperature); 
  delay(1000);

  if (temperature < 3)   
  {
   digitalWrite(redOne,LOW);
   digitalWrite(redTwo,LOW);
   digitalWrite(redThree,LOW);
   digitalWrite(redFour,LOW);
   digitalWrite(yellowOne,LOW);
   digitalWrite(yellowTwo,LOW);
   digitalWrite(yellowThree,LOW);
   digitalWrite(yellowFour,LOW);
   digitalWrite(greenOne,LOW);
   digitalWrite(greenTwo,LOW);
   digitalWrite(greenThree,LOW);
   digitalWrite(greenFour,HIGH);
   delay(1000);
  }

  if (temperature >= 3 && temperature < 6) 
  {
   digitalWrite(redOne,LOW);
   digitalWrite(redTwo,LOW);
   digitalWrite(redThree,LOW);
   digitalWrite(redFour,LOW);
   digitalWrite(yellowOne,LOW);
   digitalWrite(yellowTwo,LOW);
   digitalWrite(yellowThree,LOW);
   digitalWrite(yellowFour,LOW);
   digitalWrite(greenOne,LOW);
   digitalWrite(greenTwo,LOW);
   digitalWrite(greenThree,HIGH);
   digitalWrite(greenFour,LOW);
  }

  if (temperature >= 6 && temperature < 9) 
  {
   digitalWrite(redOne,LOW);
   digitalWrite(redTwo,LOW);
   digitalWrite(redThree,LOW);
   digitalWrite(redFour,LOW);
   digitalWrite(yellowOne,LOW);
   digitalWrite(yellowTwo,LOW);
   digitalWrite(yellowThree,LOW);
   digitalWrite(yellowFour,LOW);
   digitalWrite(greenOne,LOW);
   digitalWrite(greenTwo,HIGH);
   digitalWrite(greenThree,LOW);
   digitalWrite(greenFour,LOW);
  }

  if (temperature >= 9 && temperature < 12) 
  {
  
   digitalWrite(redOne,LOW);
   digitalWrite(redTwo,LOW);
   digitalWrite(redThree,LOW);
   digitalWrite(redFour,LOW);
   digitalWrite(yellowOne,LOW);
   digitalWrite(yellowTwo,LOW);
   digitalWrite(yellowThree,LOW);
   digitalWrite(yellowFour,LOW);
   digitalWrite(greenOne,HIGH);
   digitalWrite(greenTwo,LOW);
   digitalWrite(greenThree,LOW);
   digitalWrite(greenFour,LOW);
  }

  if (temperature >= 12 && temperature < 15) 
  {
   digitalWrite(redOne,LOW);
   digitalWrite(redTwo,LOW);
   digitalWrite(redThree,LOW);
   digitalWrite(redFour,LOW);
   digitalWrite(yellowOne,LOW);
   digitalWrite(yellowTwo,LOW);
   digitalWrite(yellowThree,LOW);
   digitalWrite(yellowFour,HIGH);
   digitalWrite(greenOne,LOW);
   digitalWrite(greenTwo,LOW);
   digitalWrite(greenThree,LOW);
   digitalWrite(greenFour,LOW);
  }

  if (temperature >= 15 && temperature < 18) 
  {
   digitalWrite(redOne,LOW);
   digitalWrite(redTwo,LOW);
   digitalWrite(redThree,LOW);
   digitalWrite(redFour,LOW);
   digitalWrite(yellowOne,LOW);
   digitalWrite(yellowTwo,LOW);
   digitalWrite(yellowThree,HIGH);
   digitalWrite(yellowFour,LOW);
   digitalWrite(greenOne,LOW);
   digitalWrite(greenTwo,LOW);
   digitalWrite(greenThree,LOW);
   digitalWrite(greenFour,LOW);
  }

  if (temperature >= 18 && temperature < 21) 
  {
   digitalWrite(redOne,LOW);
   digitalWrite(redTwo,LOW);
   digitalWrite(redThree,LOW);
   digitalWrite(redFour,LOW);
   digitalWrite(yellowOne,LOW);
   digitalWrite(yellowTwo,HIGH);
   digitalWrite(yellowThree,LOW);
   digitalWrite(yellowFour,LOW);
   digitalWrite(greenOne,LOW);
   digitalWrite(greenTwo,LOW);
   digitalWrite(greenThree,LOW);
   digitalWrite(greenFour,LOW);
  }

  if (temperature >= 21 && temperature < 24) 
  {
   digitalWrite(redOne,LOW);
   digitalWrite(redTwo,LOW);
   digitalWrite(redThree,LOW);
   digitalWrite(redFour,LOW);
   digitalWrite(yellowOne,HIGH);
   digitalWrite(yellowTwo,LOW);
   digitalWrite(yellowThree,LOW);
   digitalWrite(yellowFour,LOW);
   digitalWrite(greenOne,LOW);
   digitalWrite(greenTwo,LOW);
   digitalWrite(greenThree,LOW);
   digitalWrite(greenFour,LOW);
  }

  if (temperature >= 24 && temperature < 27)   
  {
   digitalWrite(redOne,LOW);
   digitalWrite(redTwo,LOW);
   digitalWrite(redThree,LOW);
   digitalWrite(redFour,HIGH);
   digitalWrite(yellowOne,LOW);
   digitalWrite(yellowTwo,LOW);
   digitalWrite(yellowThree,LOW);
   digitalWrite(yellowFour,LOW);
   digitalWrite(greenOne,LOW);
   digitalWrite(greenTwo,LOW);
   digitalWrite(greenThree,LOW);
   digitalWrite(greenFour,LOW);
  }

  if (temperature >= 27 && temperature < 30) 
  {
   digitalWrite(redOne,LOW);
   digitalWrite(redTwo,LOW);
   digitalWrite(redThree,HIGH);
   digitalWrite(redFour,LOW);
   digitalWrite(yellowOne,LOW);
   digitalWrite(yellowTwo,LOW);
   digitalWrite(yellowThree,LOW);
   digitalWrite(yellowFour,LOW);
   digitalWrite(greenOne,LOW);
   digitalWrite(greenTwo,LOW);
   digitalWrite(greenThree,LOW);
   digitalWrite(greenFour,LOW);
  }

  if (temperature >= 30 && temperature < 33) 
  {
   digitalWrite(redOne,LOW);
   digitalWrite(redTwo,HIGH);
   digitalWrite(redThree,LOW);
   digitalWrite(redFour,LOW);
   digitalWrite(yellowOne,LOW);
   digitalWrite(yellowTwo,LOW);
   digitalWrite(yellowThree,LOW);
   digitalWrite(yellowFour,LOW);
   digitalWrite(greenOne,LOW);
   digitalWrite(greenTwo,LOW);
   digitalWrite(greenThree,LOW);
   digitalWrite(greenFour,LOW);
  }

  if (temperature >= 33 && temperature < 36) 
  {
   digitalWrite(redOne,HIGH);
   digitalWrite(redTwo,LOW);
   digitalWrite(redThree,LOW);
   digitalWrite(redFour,LOW);
   digitalWrite(yellowOne,LOW);
   digitalWrite(yellowTwo,LOW);
   digitalWrite(yellowThree,LOW);
   digitalWrite(yellowFour,LOW);
   digitalWrite(greenOne,LOW);
   digitalWrite(greenTwo,LOW);
   digitalWrite(greenThree,LOW);
   digitalWrite(greenFour,LOW);
  }
}

void trialrun ()
{
  for (index = 2; index < 14; index++)
  {
    digitalWrite(index, HIGH);
    delay(500);
    digitalWrite(index, LOW);
    delay(500);
  }
}

... results?

system · April 21, 2013, 7:40pm

Problem solved thanks for your help!

runaway_pancake · April 21, 2013, 8:01pm

Karma++ ?

Pedro147 · April 22, 2013, 1:59am

This is a perfect opportunity to ask the question. How do you give someone karma on this forum? Thanks 8)

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Will this basic LED circuit work?

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