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3301  Using Arduino / Installation & Troubleshooting / Re: Problems Running A Sketch on UNO with a 12 VDC external power supply on: April 12, 2012, 09:29:34 pm
Also, there is 0 v registered between GND and Vin.
If that the case, then why would you expect the regulator to work?  There's no voltage going into the regulator.
3302  Using Arduino / Installation & Troubleshooting / Re: arduino uno red led,s on: April 12, 2012, 09:27:07 pm
this board pcb is stamped with arduino so that explains  how the clone builders  have done it,

It isn't much of a mystery.  The pcb file is available on Arduino.cc.  Doesn't take much to download it and make one.
3303  Using Arduino / General Electronics / Re: Different V_Aref for different analog pins? Is is doable? on: April 12, 2012, 08:33:07 pm
Well maybe you only need to discard the first.

From the ATmega328 datasheet:
"When the bandgap reference voltage is used as input to the ADC, it will take a certain time for the voltage to stabilize. If not stabilized, the first value read after the first conversion may be wrong."
3304  Using Arduino / Microcontrollers / Re: full 23 i/o pins on atmega328 on: April 12, 2012, 08:26:59 pm
Details...  smiley-wink
3305  Using Arduino / Installation & Troubleshooting / Re: Arduino Crashes on Mac OS X 10.7.3 (lion) when uploading to Uno on: April 12, 2012, 08:26:31 pm
Well, the movie proves what you said... smiley-wink  Unfortunately, that's about all. 

I guess it is time to try 0023.

What happens if the Arduino isn't connected?  or if you select the wrong serial port? 
3306  Using Arduino / Installation & Troubleshooting / Re: Problems Running A Sketch on UNO with a 12 VDC external power supply on: April 12, 2012, 08:20:26 pm
Is the polarity correct?  With your multimeter's positive lead on Vin and your negative lead on GND, you are seeing positive 12V?
3307  Using Arduino / Installation & Troubleshooting / Re: Uno & Windows 7 x64... no com ports showing on: April 12, 2012, 08:17:55 pm
Disconnect the Uno and re-start the IDE.  Does COM4 still show up in the list?  If so, the Arduino is not COM4.
3308  Using Arduino / Installation & Troubleshooting / Re: arduino uno red led,s on: April 12, 2012, 08:17:01 pm
Clone makers use RED because they are cheaper.  That gives you an idea of the (non-)quality of the clone boards. 
3309  Using Arduino / Microcontrollers / Re: Uno voltage minimum on: April 12, 2012, 07:49:44 pm
BTW, how come the regulator doesn't mind if you put 5v on it's output, when not powering the input?
Because the schematic asked nicely.
3310  Using Arduino / Microcontrollers / Re: full 23 i/o pins on atmega328 on: April 12, 2012, 07:48:09 pm
A6 and A7 are usable.  The IDE recognizes them even though they aren't broken out to pins on the Arduino board
3311  Using Arduino / General Electronics / Re: Different V_Aref for different analog pins? Is is doable? on: April 12, 2012, 01:02:58 pm
I'll just toss out the first reading as James said. Thanks everyone!
It takes more than 1.

Quote
Note:
After changing the analog reference, the first few readings from analogRead() may not be accurate.
http://arduino.cc/en/Reference/AnalogReference
3312  Using Arduino / Project Guidance / Re: Ipad Based wireless DMX stagelighting Control on: April 12, 2012, 12:54:24 pm
am looking at a more convenient way, meaning no laptops, just arduino, wifly, ipad and my dmx stage lights.
Okay.

2) http://makesomecode.com/2009/12/30/arduino-osc-iphone-and-dmx/
    this is exactly how i wanted it to be, just that instead of using the ethernet shield, i want to use wifly to communicate with my ipad.
That's not exactly what you just said.  There is a router invovled in #2.  There isn't one in your "just arduio, wifly, ipad" scenario.  The Arduino is running a small server sketch which communicates with the iOS device through the router.
3313  Using Arduino / General Electronics / Re: SMT oops on: April 12, 2012, 11:11:04 am
Agree about the breakout boards, I'm too cheapskate to  buy them.

Personally, my time is worth something.  I wouldn't want to spend 2-3 hours trying to solder to a chip that I might ultimately burn up.  Factor in time and frustatio, you'll find that breakout boards can be an awesome value.
3314  Using Arduino / General Electronics / Re: SMT oops on: April 12, 2012, 08:44:05 am
Keep in mind that the 260°C is for the reflow oven where the entire package is subjected to that heat. 

There's a reason why hobby-vendors supply these on breakout boards.
3315  Using Arduino / Programming Questions / Re: While loop not behaving as expected on: April 11, 2012, 09:19:33 pm
P.S. I am still not sure why my original while loop did not work (see first post in this topic)?

Printing must not actually occur until you exit the interrupt routine.  That can't happen if the ISR is stuck in an infinite loop.
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