arduino board help plz

[robonoob]

okei i will post my software questions here too then...
look at this: http://www.arduino.cc/playground/ComponentLib/Servo and plz tell me if i could use this library if i am using 90 degree servos instead of 180 degree?

[Admin]

you will probably have to tweak the servo timing a bit, but otherwise yeap it should work right away

[robonoob]

okei good but how can i tweak the servo timing?(i mean i dont even know what this is )

edit: i tried to make my first pseudocode too just tell me if this would be good

turn scanner forward
take IR reading
if( IR detects object
turn scanner left
take IR reading
if( IR detects object
turn scanner right
if( IR detects object
move robot backwards
wait 1s
turn left
else turn robot right)
else turn robot left)
else move robot forward)
loop

(and remember i am using arduino which can be programmed with a code similar to C or C++)

[Admin]

this should help you understand servo programming better:
http://www.societyofrobots.com/robotforum/index.php?topic=2724.0

and you can't have three else statements in a row

else turn robot right)
else turn robot left)
else move robot forward)

do something like:
if IR detects object
  turn scanner
else
  robot turns that direction
  go straight

[robonoob]

this should help you understand servo programming better:
http://www.societyofrobots.com/robotforum/index.php?topic=2724.0

and you can't have three else statements in a row

else turn robot right)
else turn robot left)
else move robot forward)

do something like:
if IR detects object
  turn scanner
else
  robot turns that direction
  go straight

every one of those else statements go together with one if statement above thats why i used "(" and ")"

edit: wtf? quote admin:: By varying the number - say 22 or 27 instead of 25, you can slow down or speed up your servo. Servos make a different humming noise depending on the speed (because of the gears meshing at different frequencies). ::end of quote
you mean that i can change the speed of servo?(modified)

edit2: okei i made a simple code that i think should work but if i use this code then what would be the point of scanning? what i want to do is something like scan the sensor from left to right(i am using a 90 degree servo) and then if it sees an object then it would turn somewhere... but how can i do that? do i have to array the sensor values?


int scannerPin = 9; //this is the scanning servo
int servoleftPin = 10;
int servorightPin = 11;
int maxpulse = 1.9;
int minpulse = 1.1;
int neutralpulse = 1.5;
int IRsensorPin = 0;
int IRreading;
int movemode = 0;

void setup() {
  pinMode(9, OUTPUT);
  pinMode(10, OUTPUT);
  pinMode(11, OUTPUT);
  pinMode(0, INPUT);
  digitalWrite(servoleftPin, HIGH);
  delay(1.5);
  digitalWrite(servoleftPin, LOW);
  digitalWrite(servorightPin, HIGH);
  delay(1.5);
  digitalWrite(servorightPin, LOW);
  digitalWrite(scannerPin, HIGH);
  delay(1.5);
  digitalWrite(scannerPin, LOW);
  }
 void loop() {
   IRreading = analogRead(0);
   if(IRreading > 500) {
     movemode = 1;
     }
     else {
       movemode = 2;
       }
       
       if(movemode == 1) {
         digitalWrite(servoleftPin, HIGH);
         delay(1.9);
         digitalWrite(servoleftPin, LOW);
         digitalWrite(servorightPin, HIGH);
         delay(1.9);
         digitalWrite(servorightPin, LOW);
         }
         if(movemode == 2) {
         digitalWrite(servoleftPin, HIGH);
         delay(1.1);
         digitalWrite(servoleftPin, LOW);
         digitalWrite(servorightPin, HIGH);
         delay(1.9);
         digitalWrite(servorightPin, LOW);
         }
         }

[robonoob]

okei i have come to this idea... look at this picture: that 159 mm is the width of my robot and i am planing to scan the area of that width and take 5 readings...if any of those readings detects an object the robot will turnif not it will go straight
my question now is how can i array these sensor values with the arduino? i read the array article on arduino.cc but it was quite hard to understand...
and if any of you have any other solutions for me then i'dd really appreciate them

and remember that i am using a 90 degree servo...

of and i have thought about this thing too: i modify the scanning servo aswell and then i can turn the servo 90 degrees to right and 90 degrees to left(i only have to set the right ammount of time that the servo can turn or it will start spinning and mess up the wires )

[Ro-Bot-X]

Man why don't you use the Servo library for Arduino?

see a sample code:

Code: [Select]

#include <Servo.h>

Servo servo1;


void setup() {

  pinMode(9,OUTPUT);
  servo1.attach(9);
  //servo1.setMaximumPulse(2000);
  //servo1.setMinimumPulse(700);
  servo1.write(700);
  int v = 700;
  int IRreading = 0;
  int movemode = 0;
}

void loop() {

  IRreading = analogRead(0);

   if(IRreading > 500) {              //is this for no object? if it is, then scan left-to-right
          movemode = 1;
   }
   else {                                  //object found
          movemode = 2;
   }

    if(movemode == 1) {
         v += 100;
         if(v>2000){
              v = 2000;
         }
         servo1.write(v);
    }

    if(movemode == 2) {        //set it to do something else, I just set it to scan right-to-left
         v -= 100;
         if(v<700){
              v = 700;
         }
         servo1.write(v);
    }

    Servo::refresh();

}

[robonoob]

okei thank you for the code but i have a 90 degree servo and i dont know what do i have to do to use the servo library with this servo...
(and this code was quite difficult for me to understand )
plz help me! how can i turn the 180 degree servo library into a 90 degree servo library?

[Ro-Bot-X]

All you have to do is determine the minimul pulse (700 microseconds in the above example) and the maximum pulse and declare them. To move the servo to a position, all you have to do is servo.write(pulsewidth), where pulsewidth is in microseconds, from minimum to maximum declared. 1500 is the value for centering the servo.
To understand how it works, take a look at the samples on the Arduino Playground pages.

I don't know the values that will work for a 90 degree servo, you have to start from 1500 and go up until the servo stops rotating. Same going down from 1500.

[robonoob]

Code: [Select]

#include <Servo.h>

Servo servoleft;
Servo servoright;
Servo scanner;
int sensor = 0;
int IRread1 = 0;
int IRread2 = 0;
int IRread3 = 0;
int IRread4 = 0;
int IRread5 = 0;
int moveMode = 0;
int scan = 0;
int object = 0;
void setup() {
  pinMode(9, OUTPUT);
  pinMode(10, OUTPUT);
  pinMode(11, OUTPUT);
  pinMode(0, INPUT);
  servoleft.attach(9);
  servoleft.setMinimumPulse(1100);
  servoleft.setMaximumPulse(1900);
  servoleft.write(1500);
  servoright.attach(10);
  servoright.setMinimumPulse(1100);
  servoright.setMaximumPulse(1900);
  servoright.write(1500);
  scanner.attach(11);
  scanner.setMinimumPulse(1100);
  scanner.setMaximumPulse(1900);
  scanner.write(1500);
  Serial.begin(9600);
  Serial.println("Ready to Rock 'n' Roll baby");
}
void loop() {
  scan = 1;   //scan front
  if(object == 0){
    moveMode = 1;
    }
  else if(object == 1) {   //if object front then turn left
    Serial.println("Object in front");
    moveMode = 2;
    scan = 1;   //scan left
    if(object == 1) {   //if object left then turn right 2 times(that means turn around)
      Serial.println("Object on the left");
      moveMode = 3;
      moveMode = 3;
      scan = 1;   //scan right
      if(object == 1);
      {   //if object right then turn right once more(that means the robot is facing the opposite direction that at the start)
        Serial.print("Object on the right");
        moveMode = 3;
      }
    }
  }
  if (scan == 1) {
    scanner.write(1376);      //this whole group takes 5 readings
    IRread1 = analogRead(0);  //from front of the robot
    scanner.write(1438);       //and if any of tose readings
    IRread2 = analogRead(0);   //detects and object then
    scanner.write(1500);        //the programm tells the robot
    IRread3 = analogRead(0);    //that there is an object :)
    scanner.write(1562);     
    IRread4 = analogRead(0); 
    scanner.write(1624);     
    IRread5 = analogRead(0);   
    if (IRread1 > 500 || IRread2 > 500 || IRread3 > 500 || IRread4 > 500 || IRread5 > 500) {
      object = 1;
    }
    else (IRread1 <= 500 || IRread2 <= 500 || IRread3 <= 500 || IRread4 <= 500 || IRread5 <= 500);
    {
      object = 0;
    }
  }
  if(moveMode == 1) {
    servoleft.write(1100);   //move straight
    servoright.write(1900);
  }
  if(moveMode == 2) {
    servoleft.write(1900);   // turn left for 0.6 seconds
    servoright.write(1900);
    delay(600);
    servoleft.write(1500);   
    servoright.write(1500);
  }
  if(moveMode == 3) {
    servoleft.write(1100);   //turn right for 0.6 seconds
    servoright.write(1100);
    delay(600);
    servoleft.write(1500);
    servoright.write(1500);
  }
}okei i made this code (thank you ro-bot-x i made what u recommended)
i used the servo library, plz tel me if this would work? or would it make any errors( like start spinning on place or something...)?
BTW: is there any way i can change the speed of the servos?(i think not but just to be sure...)

if(IRreading > 500) {              //is this for no object? if it is, then scan left-to-right

actually no if IRreading > 500 then object detected (i think but i'm not sure cuz i still havent recieved the sensor and the arduino to test it)

EDIT: oops im so sorry i posted a wrong code and named it mine buy i fixed this problem now

[robonoob]

hey ppl i've been working with some codes :9 and i came up with this one(kinda used the same left edge detection that admins robot uses )

Code: [Select]

#include <Servo.h>

Servo servoleft;
Servo servoright;
Servo scanner;
int IRsensor = 0;
int scannerpos = 0;
int IRread = 0;
int leftedge = 0;
int scan = 0;
int moveMode = 0;


void setup() {
  pinMode(9, OUTPUT);
  pinMode(10, OUTPUT);
  pinMode(11, OUTPUT);
  pinMode(0, INPUT);
  servoleft.attach(9);
  servoleft.setMinimumPulse(1100);
  servoleft.setMaximumPulse(1900);
  servoleft.write(1500);
  servoright.attach(10);
  servoright.setMinimumPulse(1100);
  servoright.setMaximumPulse(1900);
  servoright.write(1500);
  scanner.attach(11);
  scanner.setMinimumPulse(1100);
  scanner.setMaximumPulse(1900);
  scanner.write(1500);
  Serial.begin(9600);
  Serial.println("Ready To Rock 'n' Roll Baby");
}
void loop() {

  if(leftedge == 1) {
    scanner.write(1100);
    moveMode = 1;
  }
  else if(leftedge == 0) {
    scanner.write(1900);
    moveMode = 2;
  }
  if(scan == 1) {
    IRread = analogRead(0);
    moveMode = 3;
    if(IRread > 500) {
      leftedge = 1;
    }
    else if(IRread <= 500) {
      leftedge = 0;
    }
  }
  if(moveMode == 1) {
    servoleft.write(1100);
    servoright.write(1900);
  }
  else if(moveMode == 2) {
    servoleft.write(1900);
    servoright.write(1900);
  }
  else if(moveMode == 3) {
    servoleft.write(1100);
    servoright.write(1900);
  }
}this finds the objects left edge and tries to head towards it(i dont know if this would work though )
and i want you to check this over and tell me if this would work as i want it to work or not?
also i dont know how to get the scanner.write value equal to the scannerpos value... i mean like something like this

Code: [Select]

scannerpos = scanner.write
if scanner.write(1900)
then scannerpos would be 1900 aswell
if scannerpos > 1500(neutral position of the servo)
turn robot right
if scannerpos < 1500
turn robot left
EDIT: i think i'm going to make a step-by-step tutorial if my mobile phone camera allows me to make enought detailed pictures..

[Admin]

Again, I am impressed with your image . . . I assume you won't mind me putting this on the sharpIR tutorial?
http://www.societyofrobots.com/robotforum/index.php?topic=2573.msg21176#msg21176

Oh and you should invest in a good digital cam. I regret every day that I have limited and low quality video of my earlier robots

[robonoob]

Again, I am impressed with your image . . . I assume you won't mind me putting this on the sharpIR tutorial?
http://www.societyofrobots.com/robotforum/index.php?topic=2573.msg21176#msg21176

Oh and you should invest in a good digital cam. I regret every day that I have limited and low quality video of my earlier robots

yea i saw that you have put this picture to the tutorial i'm so proud now :D
and  unfortunately i dont have money to buy the camera i would be very happy if i had one but yea... too bad huh.
anyway still anybody plz can you tell me what do u think abou the codes i wrote some posts ago

[robonoob]

Hi ppl i got my arduino starter pack yesterday and it is soooo AWESOME (my first robot-like thing )
i made the LED knightrider and blink etc... but i was wondering how to connect the photocell i got from the pack so it would give me proper input? do i need to use resistors? what resisors? where should i connect what?

[airman00]

[Trumpkin]

Have fun Robonoob! 

[robonoob]

okei thank you ill try this one out
if anybody has any interesting ideas what to do with my arduino board then let me know of them
(i dont have any servos or stuff yet )

[robonoob]

Hey ppl i got some IR emitters and receivers (i think that his is what they are) from an old mouse.
i thought you could help me figure out how to use them as an encoder detectors notice that half of them have been coloured red on top and half of them are coloured black. i mean that that means which one is emitter and which one is receiver. but i don't know which if which. so, these black frame-like things are the things that hold the sensors as shown on the pictures as well.
so tell me how would i have to wire these things up on my arduino mini breadboard

[Trumpkin]

the black ones are the detectors. it looks like 1 might be burnt.

[robonoob]

the black ones are the detectors. it looks like 1 might be burnt.

okei the black is detector but still how would i need to wire them up?
and i dont think it is burnt i think that the light played a trick on us


edit: i made an h-bridge with my arduino too so i can run motors at the moment i may make a simple robot using my 1 photocell and the h-bridge
any ideas? oh and the IR emitters and detectors (look above) i'd like to use as well
so pleaseee give me ideas and/or links to any this kind of projects
thank you in advance

[robonoob]

hi
still no reply
anyway i made an awesome robotlike thing its just a simple prototype(i think)
anyway i took an old CD-rom, make a simple car out of it that can drive only backward and forward.
i put a light sensing resistor on to the front of it and programmed the arduino, so that if the robot is too close to a wall(the sensor is in a shadow) then the robot goes backwards, and if the sensor see's no wall(it sees light), then the robot goes straight.
i hope you understood what i just said
anyway i am very pleased with my first "robotlike" thing

still wateing to get some guidance about theese IR sensors mentioned above.

[robonoob]

okey ppl i received my parts today(about time huh?) and now I'm trying to put it all together...as admin told me that i can post my software questions here too, I'm going to ask you some things:

how can i make the servo turn clockwise for 1 second and then counterclockwise for 1 second and then again clockwise 1 second and so on, so on??? remember I'm using arduino, so its C++(or C, i don't really know)
i believe it has something to do with millis() function, but because I've never used millis() before, i don't know how to use it.

then secondly. how would you recommend me to make the robot scan? like scan from front and then sides and then make a decision? or scan from front and if there is an object then scan from the sides for a way to go?
or o u ppl have any better ideas for me to use?i wanted to do something like this: scan from five different directions: far left, left, front, right, far right. then make a decision where to move and then scan again.
but i think that this makes the robot to stop while it is scanning, but i want it to move and scan at the same time(of course if it is even possible)

i really hope you can help me with this guys.
oh and keep in mind that this is still my first robot, so be patient with me

thank you.

[airman00]

okey ppl i received my parts today(about time huh?) and now I'm trying to put it all together...as admin told me that i can post my software questions here too, I'm going to ask you some things:

how can i make the servo turn clockwise for 1 second and then counterclockwise for 1 second and then again clockwise 1 second and so on, so on??? remember I'm using arduino, so its C++(or C, i don't really know)
i believe it has something to do with millis() function, but because I've never used millis() before, i don't know how to use it.

then secondly. how would you recommend me to make the robot scan? like scan from front and then sides and then make a decision? or scan from front and if there is an object then scan from the sides for a way to go?
or o u ppl have any better ideas for me to use?i wanted to do something like this: scan from five different directions: far left, left, front, right, far right. then make a decision where to move and then scan again.
but i think that this makes the robot to stop while it is scanning, but i want it to move and scan at the same time(of course if it is even possible)

i really hope you can help me with this guys.
oh and keep in mind that this is still my first robot, so be patient with me

thank you.

hey robonoob

I appreciate that you condensed all your questions

but I would like  a new thread for the software questions

[robonoob]

considered, done

[Brandon121233]

Hey sorry I didn't find this earlier but have you guys checked out my tutorial on Walbot? I made my robot with the Arduino board, the MaxEZ1 Ultrasonic sensor and 2 Sharp dist. sensors. I answer a lot of your questions that you have been asking in my tutorial thats on this website under the Member Tutorials page http://www.societyofrobots.com/member_tutorials/node/45, if you have any questions more about your project, I know a bunch about the Arduino board and I'm sure I could help you...

[newbie]

The $50 Robot (with ATmega168 upgrade) uses the same microcontroller as the Arduino. Code is the same.

Nope, it actually isn't. The Arduino uses an own language, based on wiring. It's a whole different environment. Many things are predefined and made very easy. However, you could program it in the ordinary language.

how to redefine it in ordinary language?hard?
admin always emphasis that the two envionment is same.
i  know we can burn arduino using avr studio but how about my motor library which is afmotor.h from ladyada?
my avr studio always have this error:

gcc plug-in: Error: Object file not found on expected location C:\Users\user\Desktop\irobot\iRobot.elf
Make sure your makefile specifies the output .elf file as iRobot.elf

i am so pity no one help me ......

i got errors and error when using the below code in arduino without redefine ( i am stupid)!!!!
http://www.societyofrobots.com/robotforum/index.php?topic=5065.0
http://
i really hope that someone may help me to redefine the below code into aduino capable......
at least give some guide......
don't let me walk alone in dark(robotics),
pls help

actually i am finding some arduino software capable source code for a micromouse(either good or bad nevermind)

[Admin]

my avr studio always have this error:

gcc plug-in: Error: Object file not found on expected location C:\Users\user\Desktop\irobot\iRobot.elf
Make sure your makefile specifies the output .elf file as iRobot.elf

Just search that gcc error and you will find answers


Also, you can just use my $50 Robot code on the Arduino and it will work.