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### Topic: Solar Tracking Code (Read 5135 times)previous topic - next topic

#### woody_unreal

##### Feb 16, 2012, 11:48 amLast Edit: Feb 16, 2012, 12:14 pm by woody_unreal Reason: 1
Since of course I'm New to the increasingly exciting World of Arduino, I have been messing with my uno for several days learning Coding.
I have done , Probably what others have already , but couldn't find a complete setup. So i have created a ( Currently easly changed to 2) single axis Stepper Driven VIA recycled Transistor and a Printer motor. Running 2 Photoresistors,for direction of course .With many trials an errors, I have ( I think) all of the coding set where it needs to be. I know there have be other possable uses of GPS /Time tracking systems,but this one was more fun.
Have even set low light threshhold and travel limit switch. (1 currently)
Lets see what others think  ....
Anyone think it would be a goood idea to include a return to original rotation position from the limit switch , or do you think it would cause more headache than good ?

Code: [Select]
`/* Thomas WoodPhotoCell Controlled Stepper Motor Left and RightFeb 15,2012 */#include <Stepper.h>const int stepsPerRevolution = 48;  // Turns of the motor   int inputPhotoLeft = 0; // photresistors pin int inputPhotoRight = 1; // photresistors pinint Left = 0; // Store readings from the photoresistors. int Right = 0; // Store readings from the photoresistors.int threshhold = 550; // this is here from reading the serial monitors valued to get a ruff Idea of value to set A                      //And how dark you Want your motor to stop moving at int switchOff = 12; // adds a Rotation Limit Switch int switchState = 0 ; // Sets the limits Switches State // initialize the stepper library on pins 8 through 11:Stepper myStepper(stepsPerRevolution, 8,9,10,11); void setup() {  // Motor RPMs I Didn't want it to jerk on start  myStepper.setSpeed(20);  // initialize the serial port:  Serial.begin(9600);   pinMode(switchOff, INPUT);}void loop() {  Left = analogRead(inputPhotoLeft); // sets the photcells position left - right Right = analogRead(inputPhotoRight); switchState = digitalRead(switchOff); // gets the reading from the limit switchif ((Left < threshhold) && (Right < threshhold)){  // this is to limit the after dark operation - no need in a plane,train,street light or automobil to make the panel move :)  Serial.println("Lower threshhold Reached - hopefully we have stopped");  Serial.print("Left Sensor \t");  Serial.print(Left);  Serial.print("   Right Sensor \t");  Serial.println(Right);digitalWrite(8,LOW);digitalWrite(9,LOW);digitalWrite(10,LOW);digitalWrite(11,LOW);delay(500);} // the +20 is to reduce possable jitter between photcell readings  if ((Left > threshhold) > (Right +20 >threshhold)){  // runs the motor a 1/4 turn per instance     Serial.print("clockwise \t");   Serial.println(Left);    myStepper.step(-stepsPerRevolution/4);  delay(500);  }     if  ((Left +20 > threshhold) <  (Right > threshhold)){   // runs the motor a 1/4 turn per instance  Serial.print("counterclockwise \t");  Serial.println(Right);    myStepper.step(stepsPerRevolution/4);  delay(500);} // checking the limit switch to see if its engaged then move the motor back for 1 secondif (switchState == HIGH){  myStepper.step(stepsPerRevolution);Serial.println("Limit Switch Engaged And Moving Motor In Reverse");delay(1000);}// this line is only realy here to see the state of the switch // - not realy currently to do anythingif (switchState == LOW){ // Serial.println("Switch Is Off");  delay(1000);}{  // these are here to disengage the coils //as not to hold and in turn over heat the motordigitalWrite(8,LOW);digitalWrite(9,LOW);digitalWrite(10,LOW);digitalWrite(11,LOW);}}`

#### mmcp42

#1
##### Feb 16, 2012, 12:05 pmLast Edit: Feb 16, 2012, 12:07 pm by mmcp42 Reason: 1
if you wrap code tags around it, makes it sooo much easier to read!
Code: [Select]
`/*Thomas WoodPhotoCell Controlled Stepper Motor Left and RightFeb 15,2012 */#include <Stepper.h>const int stepsPerRevolution = 48;  // Turns of the motor   int inputPhotoLeft = 0; // photresistors pin int inputPhotoRight = 1; // photresistors pinint Left = 0; // Store readings from the photoresistors. int Right = 0; // Store readings from the photoresistors.int threshhold = 550; // this is here from reading the serial monitors valued to get a ruff Idea of value to set A                      //And how dark you Want your motor to stop moving at int switchOff = 12; // adds a Rotation Limit Switch int switchState = 0 ; // Sets the limits Switches State // initialize the stepper library on pins 8 through 11:Stepper myStepper(stepsPerRevolution, 8,9,10,11);void setup() {  // Motor RPMs I Didn't want it to jerk on start  myStepper.setSpeed(20);  // initialize the serial port:  Serial.begin(9600);   pinMode(switchOff, INPUT);}void loop() {  Left = analogRead(inputPhotoLeft); // sets the photcells position left - right Right = analogRead(inputPhotoRight); switchState = digitalRead(switchOff); // gets the reading from the limit switchif ((Left < threshhold) && (Right < threshhold)){  // this is to limit the after dark operation - no need in a plane,train,street light or automobil to make the panel move smiley  Serial.println("Lower threshhold Reached - hopefully we have stopped");  Serial.print("Left Sensor \t");  Serial.print(Left);  Serial.print("   Right Sensor \t");  Serial.println(Right);digitalWrite(8,LOW);digitalWrite(9,LOW);digitalWrite(10,LOW);digitalWrite(11,LOW);delay(500);} // the +20 is to reduce possable jitter between photcell readings  if ((Left > threshhold) > (Right +20 >threshhold)){  // runs the motor a 1/4 turn per instance     Serial.print("clockwise \t");   Serial.println(Left);    myStepper.step(-stepsPerRevolution/4);  delay(500);  }     if  ((Left +20 > threshhold) <  (Right > threshhold)){   // runs the motor a 1/4 turn per instance  Serial.print("counterclockwise \t");  Serial.println(Right);    myStepper.step(stepsPerRevolution/4);  delay(500);}// checking the limit switch to see if its engaged then move the motor back for 1 secondif (switchState == HIGH){  myStepper.step(stepsPerRevolution);Serial.println("Limit Switch Engaged And Moving Motor In Reverse");delay(1000);}// this line is only realy here to see the state of the switch// - not realy currently to do anythingif (switchState == LOW){ // Serial.println("Switch Is Off");  delay(1000);}{  // these are here to disengage the coils//as not to hold and in turn over heat the motordigitalWrite(8,LOW);digitalWrite(9,LOW);digitalWrite(10,LOW);digitalWrite(11,LOW);}}`

looks ok
does it work how you wanted it to?
there are only 10 types of people
them that understands binary
and them that doesn't

#### woody_unreal

#2
##### Feb 16, 2012, 12:11 pm
Yes all i have to do is run it on a Large Turn table, to call it complete

#### woody_unreal

#3
##### Mar 06, 2012, 10:48 pm
ok Have redone the coding  the othere has some real world bugs, To much light wouldnt let it work, So here it is for everyone to use. Hope it fits your bill
Code: [Select]
`/* Thomas WoodPhotoCell Controlled Stepper Motor Left and RightFeb 15,2012 */#include <Stepper.h>const int stepsPerRevolution = 200;  // Turns of the motor int inputPhotoLeft = 0; // photresistors pinint inputPhotoRight = 1; // photresistors pinint Left = 0; // Store readings from the photoresistors.int Right = 0; // Store readings from the photoresistors.const int threshhold = 300; // this is here from reading the serial monitors valued to get a ruff Idea of value to set A                      //And how dark you Want your motor to stop moving at int difSence = 15; // differenace tolarance between sensors// initialize the stepper library on pins 8 through 11:Stepper myStepper(stepsPerRevolution, 8,9,10,11); void setup() {   myStepper.setSpeed(150);   //Serial.begin(9600);    pinMode(13, OUTPUT); }void loop() { Left = analogRead(inputPhotoLeft); // sets the photcells position left - right Right = analogRead(inputPhotoRight);digitalWrite(13,LOW); //led doesnt need to be on to start with if  (((Left > threshhold) || (Right > threshhold)) && (Left > Right + difSence)){  // Serial.print("clockwise \t"); // Serial.println(Left);    myStepper.step(-stepsPerRevolution);    digitalWrite(13,HIGH);   }if  (((Right > threshhold) || (Left > threshhold)) && (Right > Left + difSence)){ // Serial.print("counterclockwise \t"); // Serial.println(Right);   myStepper.step(stepsPerRevolution);   digitalWrite(13,HIGH);} if ((Left < threshhold) && (Right < threshhold)){  /*  // this is to limit the after dark operation -   //no need in a plane,train,street light or automobil to make the panel move :)  Serial.println("Lower threshhold Reached - hopefully we have stopped");  Serial.print("Left Sensor \t");  Serial.print(Left);  Serial.print("   Right Sensor \t");  Serial.println(Right);  */digitalWrite(8,LOW);digitalWrite(9,LOW);digitalWrite(10,LOW);digitalWrite(11,LOW);delay(5000);} { // these are here to disengage the coils as not to hold ,and in turn over heat the motordigitalWrite(8,LOW);digitalWrite(9,LOW);digitalWrite(10,LOW);digitalWrite(11,LOW);}}`

#### btbam91

#4
##### Oct 08, 2012, 08:30 pm
What stepper motor did you use? Or what do you mean by a printer motor?

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