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1  Using Arduino / Project Guidance / Re: Solar Panel Voltage and Current Reading on: August 05, 2013, 10:00:37 pm
Robin, you're using that 0.005 ohm resistor in series with your load and reading the voltage across it, and using that to calculate (or get an analog value proportionate to) the current? 

That can make for a fairly large wattage resistor.  Like the old "shunt" ammeters on trucks and tractors.

I'm using 20W and 30W PV panels (12V) for a few things and have been contemplating how to measure their output with A1.  My max current is a little over 2A short-circuit.  I'm powering the Uno from the same PV panel too, so would I need capacitors to isolate that input voltage somehow?
2  Using Arduino / Audio / Re: WAV File from SD Card on: June 30, 2013, 11:00:00 pm
It would be helpful to know what shield board you're using, or if it's your own circuitry we'd like to see your schematic.  My Adafruit Wave Shield needs it's own library to be compiled and loaded to play audio, and it seems like you have no DAC firmware or software functioning.  If it sounds like a FAX machine or a telephone modem it's because you need that DAC to turn the digital code into an audio waveform.
3  Using Arduino / Audio / Re: Arduino Wave Module V2 (elechouse) on: June 30, 2013, 10:49:40 pm

I'm getting good service from my Adafruit Wave Shields v1.1 (that's the latest rev I'm finding). 
This link:

and it's links cover it well.  I speak English as my native language, so can only speak regarding that documentation.  Be careful with translations.

It is indeed quite a procedure, but gives good results, at least for my specific purposes.

4  Using Arduino / Programming Questions / Re: ADC problem, where is the voltage come form? on: April 24, 2013, 12:45:50 pm
Is his 1st line ok?

can I refer to my 1st analog input pin as A0 as opposed to 0?
5  Community / Bar Sport / Re: Be DIFFERENT! make good posts! on: April 23, 2013, 11:47:39 pm
Well, I'll respond to a bit of this, because within just a few replies it seems that somehow the native tongue of forum users has somehow been brought in.  I very much agree with much of what our friend from Brazil had to say.  I will only post in English, because I don't feel my own fluency in another 2 languages I have used from time to time is adequate.  For technical purposes such as forums like this, computerized translation is terribly inadequate.  My complaints do NOT pertain to spelling or typographic errors, per se (as initially stated).  However, if you post code you must check every character and space, or face the deserved ire of any readers.  According to the documentation I've seen, c++ is the official language of Arduino, regardless of what human language it may appear similar to.

As far as "insulting a few million" goes, you should get your decimal places and orders of magnitude figured out, and, "if the shoe fits"......
6  Community / Bar Sport / Be DIFFERENT! make good posts! on: April 21, 2013, 09:20:20 pm
I'm new to Arduino and c++ programming.  At first I thought I'd really found a pretty cool gizmo and usergroup.  I'm confronted by a community that is worse than unhelpful.  This forum, and published books written by some of it's big members, are bristling with trash.  I could produce a huge post, full of screen captures, page scans, and links to errors, and I'm not talking simple spelling and typographic errors,,,, but I won't.

READ YOUR POSTS before you post them!!!!!!!  Better yet, cut and paste it to your notepad, and post it a few hours later, or even the next day.  Maybe I need to use larger, more universal terms; READ ANYTHING you write before you expose others to it.

I've dealt with computer and industrial documentation, programming, standards, codes, and forums since the early 1980s.  I'm absolutely sickened by this crap.   Hell, click "reference" at the homepage to find throbbing recklessness (I don't feel it's my place to pronounce it to be stupidity).

The people who most need to be hit over the head with this probably won't even read this, but maybe you don't yet see yourself as an "expert".  There's hope for you.  If you intend to write a beginners guide to ANYTHING, once you think you're done, have a couple beginners read it.  Then beg them to explain your material to you, and make suggestions.

And if you find an error late, go correct it.

7  General Category / General Discussion / Re: Is this UNO counterfeit? (last one of these, I promise) on: April 19, 2013, 10:33:03 pm
I just got an envelope from China with 7 (almost certainly) counterfeit Arduino boards, which I bought through Amazon, probably "marketplace".  (Hey, I live 20 miles from Seattle!)  I certainly didn't expect counterfeits, but the price should have warned me.  I don't approach all my online purchases as though they were a trip to a market in the mideast or 3rd world,,, yet.  I got my 1st Arduino on Amazon just a month or so earlier, for at least 2x the price, but do I know it to be "genuine"?  I can't distinguish it from one at the local Radio Shack.

I won't knowingly purchase from a counterfeiter or other thief.  I only buy anything Chinese if an item is not available otherwise, and due to my thoughtless countrymen and politicians this is increasingly the case.  Still, if it's just a matter of where something is imported from, I don't have a lot of demands, other than not being lied to.

We are talking "open hardware" here.  The slimy chinks could easily come up with their own brand and just sell their stuff openly and cheap, but they're just too perverse to bother with honesty or integrity.  They're nearly as perverse as the outsourcers that brought them the capabilities to do what they do.
8  Using Arduino / Installation & Troubleshooting / Re: Have I fried my Arduino??? on: April 09, 2013, 07:52:16 pm
I'd say you've drawn more from that 5V buss than it could handle.  I'm a bit curious about which board you're using, probably not an Uno R3.  Whenever you draw off that regulated buss you should run your app through your VOM to read your current use.  I'd get worried at 50mA without even digging into the specs,,, and I can't dig into any specs without knowing your board.

I'd love to see a simple schematic of what you're doing there, I'm just starting into reading 2 voltages in the 8-20VDC range, I could "go digital" on one of those, now that I see your description of your application there.

These sure are handy little boards, aren't they?!

9  Using Arduino / Audio / Re: Arduino Wave Module V2 (elechouse) on: March 17, 2013, 11:20:32 pm
hmmm, that's not so hot.  Thanks for the info.

I'm working with a wav shield by Adafruit (or ladyada) that supposedly handles 16 bit, 22kHz, FAT32 and SDHC.  I'm not up and running yet, but they've had this one out for a bit, and it's rev 1.1.  I'll try to let you know how it works out.  Uno is my platform at this point.

I may be pressed for processor power and working memory space, but I don't know if 8bit and that low a sample rate can give me workable fidelity for my purposes.
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