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1  Using Arduino / Microcontrollers / Remove Atmega328P-PU for stand alone project on: November 26, 2012, 07:21:38 pm
I am still trying to figure this out and I know some out there has asked this same question with different words, but can I build a prototype on my uno r3 and then build for real off just the chip and (i assume we need) a crystal?

I found this

http://www.hobbytronics.co.uk/image/data/tutorial/arduino-hardcore/atmega328-arduino-pinout.jpg

and it looks like the start to my question but i want to know things like:
can i still have a reset button?
What are pins 20 21 & 22 (ARef)?
I have never seen a chip with power not on the corners but i am to believe that +5v is on pin 7 and ground is 8?
What is the voltage tolerance?
Should i even ask what SPI (pins 17,18&19)& I2C(27&28) is?

thanks for the support in advance!
2  Using Arduino / LEDs and Multiplexing / Re: Led for flash on: November 15, 2012, 10:18:52 pm
http://www.superbrightleds.com/moreinfo/component-leds/vollong-5w-white-high-power-leds/898/

these are powerful but might not fit you packaging style. poke around the rest of the site to be sure !
3  Using Arduino / LEDs and Multiplexing / Led oscillate on: November 15, 2012, 09:38:37 pm
i am learning
i am trying to figure out how to make 2 LEDs fade but out of phase

here is my fail attempt


/*
 *Double fade
 *
 *
 *This sketch is an experement to make two leds fade on and off
 *in opposite time to eachother.
 */

int led1 = 6; // the pin that the LED is attached to
int led2 = 5;
int brightness = 0;    // how bright the LED is
int fadeAmount = 5;    // how many points to fade the LED by

// the setup routine runs once when you press reset:
void setup()  {
  // declare pin 9 to be an output:
  pinMode(led1, OUTPUT);
  pinMode(led2, OUTPUT);
}

// the loop routine runs over and over again forever:
void loop()  {
  // set the brightness of pin 9:
  analogWrite(led1, brightness); 
  delay(15);
  analogWrite(led2, brightness); 

  // change the brightness for next time through the loop:
  brightness = brightness + fadeAmount;

  // reverse the direction of the fading at the ends of the fade:
  if (brightness == 0 || brightness == 255) {
    fadeAmount = -fadeAmount ;
  }     
  // wait for 30 milliseconds to see the dimming effect   
  delay(30);                           
}


furthermore, i would like to learn from some lessons, but i cant seem to find anything that goes too deep. any advice?
4  Using Arduino / Project Guidance / Re: This is my first time on: November 12, 2012, 11:02:20 pm
retrolefty,
Thank you for the direction, www.sparkfun.com looks like a great resource. (RGB LEDs seems a little intense)
However, the www.makeprojects.com shield seems to have no transistors and I think the Uno having only 14 Digital In/Outputs


arduinocreativity,

Thank you, I was wondering why none of my LEDs worked and all smelled funny (jk). Much appreciated pointer.

*+What I am looking for is a 'vanilla' 3x3x3 cube, my LEDs are blue I don't know how much the difference in current draw will affect the circuit beside different resistors for the LEDs
5  Using Arduino / Project Guidance / This is my first time on: November 12, 2012, 10:12:32 pm
This is my first post in a forum (took me a while to figure out how)
and my first project I would like to attempt

If there is a simpler project you feel I should attempt first let me know, I am here to learn and give back.

I own an Arduino Uno (r3) & a small pile of LEDs

I did the blink program, it was fun. I played with the timing and such but its time to step it up.

3x3x3 LED cube! I understand this has been done over and over again but in all my poking around this world wide web I can't find plans that I am confident will work with this particular Arduino device.

This post also makes me second guess myself in that if I 'need plans' I really shouldn't be messing with Arduino, I feel like I will just be mooching off the creativity and hard work of others.

Also please include tips for this forum etiquette (i r n00b)
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