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13381  Forum 2005-2010 (read only) / Bugs & Suggestions / Re: Rant about manufacturing quality on: January 16, 2011, 12:51:34 pm
My error was I just didn't scroll to the right of the picture cause I didn't notice the scroll bar. Duh!

Lefty
13382  Forum 2005-2010 (read only) / Bugs & Suggestions / Re: Rant about manufacturing quality on: January 16, 2011, 09:14:13 am
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Still shuddering at the thought of using desolder braid as toilet paper.
That's got to hurt.

Only if you apply the iron?

Lefty
13383  Forum 2005-2010 (read only) / Bugs & Suggestions / Re: Rant about manufacturing quality on: January 15, 2011, 02:09:43 pm
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Perhaps I should just leave them alone.

Hard to say without a picture to judge. If you do want to remove a little solder, I've had luck using solder wick brade, just lay the end of the brade flat as possible on the blog and apply the iron to the brade, it will suck-up a lot of the excess solder.

http://www.sparkfun.com/products/9327

Lefty
13384  Forum 2005-2010 (read only) / Bugs & Suggestions / Re: Recommendations for next iteration of Arduino on: October 07, 2010, 07:53:44 pm
I too like the smaller USB connectors and was also one of the reasons I purchased the Seeeduino Mega over the Arduino Mega board.

Lefty

13385  Forum 2005-2010 (read only) / Bugs & Suggestions / Re: IDE (0022) crash when loading invalid sketch name on: January 17, 2011, 09:18:10 am
I can tell you from experience that if you try to save a sketch while using the IDE and try and use a dash character for the file name, it gives you a bitchy message and tells that it changed the dash(s) to underscore characters.

So it seems that the IDE does not allow dashes in sketch pde file names. Don't know why, I just obey. Kind of like some of my wife's rules, don't make sense but easier to comply then not.  smiley-wink

Lefty
13386  Forum 2005-2010 (read only) / Bugs & Suggestions / Re: Arduino Uno - 2.54mm pitch compatibility on: January 13, 2011, 01:38:00 pm
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Good on seeed! I shall await the Seeeduno anxiously  

Good for you. The Seeeduino has several features that I think are a great improvement of the standard arduino design. But of course they had the advantage of designing on top of a pretty decent design to begin with. Standing on the shoulders of giants, so to speak.  smiley-wink

Yes, open source software and hardware plus multi-platform IDE are the key elements of why the Arduino platform is so successful and popular, at least in my opinion.

Lefty
13387  Forum 2005-2010 (read only) / Bugs & Suggestions / Re: Arduino Uno - 2.54mm pitch compatibility on: January 13, 2011, 12:53:07 pm
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Great minds think alike, eh lefty ?

I wouldn't know about that. No great minds at this end, as my mind has always had it's fair share of brain farts.  smiley-wink

Lefty
13388  Forum 2005-2010 (read only) / Bugs & Suggestions / Re: Arduino Uno - 2.54mm pitch compatibility on: January 13, 2011, 12:33:41 pm
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Perhaps some small updates to the next design could be made so that, if required, the header in question could be removed and re-soldered to an alternative position (along a bit, then either in or out by an appropriate amount for 2.54mm pitch).

Some manufactures of Arduino compatible boards do just that, they provide an extra row of pin pads with the correct .1" pin spacing:

http://www.seeedstudio.com/depot/seeeduino-v221-atmega-328p-p-669.html?cPath=132_133&zenid=9f6118c193cee9f8b7337d4df91a2eca

Lefty
13389  Forum 2005-2010 (read only) / Bugs & Suggestions / Re: External Power supply doesn't work on: January 12, 2011, 03:05:10 pm
A small 9vdc battery is a poor choice to power an Arduino, especially if your trying to drive leds or other external devices. The current capacity of those batteries is very small and it's voltage will sag low due to it's high internal resistance. Plus they are very expensive batteries when considering the low mah rating they have.

Lefty
13390  Forum 2005-2010 (read only) / Bugs & Suggestions / Re: External Power supply doesn't work on: January 12, 2011, 01:16:47 pm
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It should also work with 6V on DC jack according to MC33269 datasheet.

There is more to the issue then just the drop out spec for the MC33269. There is a series polarity protection diode that will drop some voltage and the auto voltage switching logic via voltage divider and op-amp comparator use a fixed reference to determine when to switch from usb power to external power. I would always recommend 8vdc as the minimum external voltage to apply to the external connector.

Lefty
13391  Forum 2005-2010 (read only) / Bugs & Suggestions / Re: External Power supply doesn't work on: January 11, 2011, 03:50:13 pm
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I have good batteries in the external power supply, but my arduino only turns on and runs the sketches when connected via USB.
Am I missing something?

What value voltage does your 'batteries' put out? The external power connector requires around 8vdc minimum to power an arduino.

Lefty
13392  Forum 2005-2010 (read only) / Bugs & Suggestions / Re: Hardware robustness... (ADC & RESET)... on: June 29, 2010, 04:26:43 pm
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it's not commonly known that the /RESET pins on most AVRs is not ESD-protected in the same way as all other I/O pins - its almost impossible to find this out in the data sheets - its very obtuse indeed.

I believe that is so it can be set-up for high voltage programming where (I think) +12vdc is wired to the reset pin. Perhaps the datasheet section covering HV programming might explain the reset pin functions better. Obviously the normal clamping diodes from Vcc to pin wouldn't work for this pin.
13393  Forum 2005-2010 (read only) / Bugs & Suggestions / Re: Problem with modulo (%) and reset on: December 31, 2010, 11:48:20 pm
Ah Ha, I knew something was mangled in those if statements, but what do I know I'm just a hardware guy faking the programming stuff.  smiley-wink

Lefty
13394  Forum 2005-2010 (read only) / Bugs & Suggestions / Re: Problem with modulo (%) and reset on: December 30, 2010, 06:55:53 pm
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Footnote:
If you hadn't been so fast on the trigger, I might have caught it and done a sneaky, silent edit to change it.  I really wish I hadn't had to lay off my proofreader and editor.  Oh, well...

Somehow I think you will get over it.  smiley-wink

Lefty
13395  Forum 2005-2010 (read only) / Bugs & Suggestions / Re: Problem with modulo (%) and reset on: December 30, 2010, 06:39:24 pm
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I can state unequivocally (and I am unanimous in that) that it has nothing do do with division.  

But that's what he is saying, division is do do.  smiley-wink

Lefty
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