Have a question on Arduino? Ask our expert Simon Monk

how to use a non boot loaded atmega328 ic in arduino?

You can use the ICSP header with a programmer like the USBTiny ISP to programe the ATMega directly, but if you are doing that, you may as well burn the bootloader using the programmer.

Thanks for your reply.I have ARDUINO UNO and an ATMEGA328(without boot loaded) IC.I need some reference for making it to be boot loaded or to program the arduino code into the ATMEGA 328 IC

@jagadeshwaran

http://arduino.cc/en/Hacking/Bootloader?from=Main.Bootloader

'ello, Matey.  Please, the next time you see Clive 'Max' Maxfield ask him if he can spell the original unit of conductance:  M??

Clue:  it is not MOH.

The source of this posting is the 3rd Ed. of his published book:

Bebop to the Boolean Boogie, Third Edition: An Unconventional Guide to Electronics

by Clive Maxfield (Dec 23, 2008)

I mean, REALLY?  in the 3rd Edition!!!

================================

Read more: http://www.answers.com/topic/mho#ixzz26vfj17xi

=========================

And what the heck is a Milliard?   

Have you seen a system that could find a dimple target, then move a small ink jet to within  .05in of dimple center?

Target will be moving down a belt line at 1/sec.

Roy.   Royincs@gmail.com

Have you seen a system that could find a dimple target, then move a small ink jet to within  .05in of dimple center?

Target will be moving down a belt line at 1/sec.

Roy.   Royincs@gmail.com

@roy david. The short answer is 'No'.

That sounds like quite a specialized industrial control problem. What is it for?

Is the target always in the same place? or are you anticipating some kind of optical sensing to find it on a plane?

Fish lure has a small dimple where the eye goes. The eye is applied with a drop of ink as the lure passes by.

Roy.  Royincs@gmail.com

@roy - if the lures are on some kind of conveyer, always in the same orientation and position, then could you just use a beam interrupting optical sensor, followed by a delay of just the right amount followed by a squirt?

That's a good idea. The present method is to use a person to dot about 3 lures by hand, then move them on down the line.  There are a lot of different size Lures and they are not located well on the belt. The little dot has to be right in the eye center or the part gets rejected. Your idea could be made to work, but it would require a lot of changes in the process to achieve the necessary tolerance. The only dependable

target with the pesent process is the dimple where that eye goes.  I was hoping to Find a optical way to locate the dimple, then program a little servo system to take the inner head there for a drop of ink.  This would give us a lot of freedom to handle most any body shape and also add some colors to the body.

Do you think one of your systems using a computer program ,servo and camera might do that job?

Roy

@roy

Yes, in theory, an accurate robot arm and a imaging system could look at a tray full of lures and put the dots or fancier painting on, but that's beyond an Arduino.

IMHO A far simpler / cheaper problem to solve is to make some kind of bracket, so that each lure is put in exactly the right place to recieve a dot.

Maybe you have a carrier with cut outs just the right size for the lures, evenly spaced, that moves past the dot painter that is set up the right X position. An indexing hole in the carrier triggers the dot paining as the eye gets to the right place.

Si.

Simon.  That's  a great idea.  I will work on it for awhile.  Thanks. Roy

Hi.

I am trying to make a DC motor turn backwards and forwards on a loop using arduino and a motor shield.

I need it to go 12rpm for about 10 seconds in each direction, with about a 5 second pause inbetween each direction change.

It seems somewhat straight forward, but I have been searching online for a while but have found no tutorial for this, or a specific code

If you would be able to help me out asap, that would be greatly appreciated.

@ash - Something a bit like this perhaps?

From my book 'Arduino + Android Projects for the Evil Genius'.

#define supplyVolts 6

#define motorVolts 5

int pwmLeftPin = 3; 

int pwmRightPin = 11; 

int directionLeftPin = 12; 

int directionRightPin = 13; 

void setup() 

{

  pinMode(pwmLeftPin, OUTPUT);

  pinMode(pwmRightPin, OUTPUT);

  pinMode(directionLeftPin, OUTPUT);

  pinMode(directionRightPin, OUTPUT);

  setMotors(0, 0);

}

void loop()

{

  // forward

  setMotors(255, 255);

  delay(1000);

  // stop

  setMotors(0, 0);

  delay(1000);

  // back

  setMotors(-255, -255);

  delay(1000);

  // left

  setMotors(255, -255);

  delay(1000);

  // right

  setMotors(-255, 255);

  delay(1000);

  // stop

  setMotors(0, 0);

  delay(5000);

}

void setMotors(int left, int right)

{

   int vLeft = abs(left) * motorVolts / supplyVolts;

   int vRight = abs(right) * motorVolts / supplyVolts;

   int dLeft = (left > 0);

   int dRight = (right > 0);

   if (vLeft < 50)

   {

     vLeft = 0;

   }

   if (vRight < 50)

   {

     vRight = 0;

   }

   analogWrite(pwmLeftPin, vLeft);

   analogWrite(pwmRightPin, vRight);

   digitalWrite(directionLeftPin, dLeft);

   digitalWrite(directionRightPin, dRight);

}