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18091  Using Arduino / LEDs and Multiplexing / Re: Single LED modulation on: August 01, 2011, 04:42:54 am
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I really need a _very_ constant output from the LED when it is on.

Lifetime?  As long as possible...
Need to hang some numbers on those WIBNIs

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if I want 10-20mA
You appear to be talking narrow margins, yet specify a 2:1 range.
18092  Using Arduino / LEDs and Multiplexing / Re: Single LED modulation on: August 01, 2011, 03:58:27 am
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I've reservations that running the LED in series with a resistor directly off an Arduino output pin will reduce the lifetime of the LED
Can you explain what leads you to think this?
What sort of lifetime do you require?

As long as you operate within the electrical and environmental specs, LEDs will have lifetimes in the tens or hundreds of thousands of hours.
18093  Community / Website and Forum / Thank you on: August 01, 2011, 03:51:46 am
Following Massimo's lead, I started off by thanking all who reported spam and forum abuse personally by email, but the sheer volume of reports coming in mean it is getting more difficult to achieve this.

I try to get onto spam as quickly as possible (though I do need the occasional break for work and sleep), so responding may not always be a priority.

So, I'd like to just say thanks to all who have reported stuff* (you know who you are), keep it coming and please keep up the good work, and let's keep this place spam-free.



* And particularly to the rather inept but helpful spammer who put his link in the "Report to moderator" box, thereby ensuring it didn't appear on the forum
18094  Using Arduino / Programming Questions / Re: Get Acceleration from Accelerometer on: August 01, 2011, 03:17:14 am
You need to check the documentation for the accelerometer.
It will give a sensitivity value, expressed in "mV/g" (for an analogue device) or "counts/g" (for a digital device).

You then simply do the arithmetic for the value you are seeing.
Don't forget the 0g offset.
18095  Community / Website and Forum / Re: Website Hardware section, please take care of it! on: August 01, 2011, 03:10:30 am
Don't involve the moderators - we're strictly forum.
18096  Using Arduino / Programming Questions / Re: Creating Objects on: August 01, 2011, 03:02:18 am
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A class is actually somewhat like a structure with functions.
Both can have functions, the only difference is for a structure, members are public by default, whereas a for class, members are private by default.
18097  Using Arduino / Programming Questions / MOVED: Acceleration Sensor BMA020 on: August 01, 2011, 02:16:15 am
This topic has been moved to Sensors.

http://arduino.cc/forum/index.php?topic=67541.0
18098  Using Arduino / Sensors / Re: Acceleration Sensor BMA020 on: August 01, 2011, 02:15:38 am
Do you have access to an oscilloscope?
18099  Community / Website and Forum / Re: Broken link in one of the tutorials. Who do I tell? on: August 01, 2011, 02:14:35 am
Sorry to be Mr. Teflon-Shoulders, but Mowcius is quite correct - "report to moderator" refers only to forum spam and abuse.
Our limited powers do not work over at the main site.
18100  Using Arduino / Programming Questions / Re: Creating Objects on: August 01, 2011, 02:03:19 am
The entity you have called "object" is not an object, it is a function, so as soon as "object" returns, "Lat" and "Long" go out of scope and are lost.

It isn't clear whether you need a C "struct" or a C++ "class" (but those are useful search terms)
18101  Using Arduino / Programming Questions / Re: Distance Program on: August 01, 2011, 01:58:40 am
http://arduino.cc/forum/index.php/topic,68037.0.html

Cross-posting is unhelpful and time-wasting.
Please don't do it.

Topics merged 08:10 BST 1 Aug 11
18102  Using Arduino / Project Guidance / Re: Noisy Data from Potentiometers on: August 01, 2011, 01:49:58 am
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Good to know that the longer the wire the more finicky the read.
Don't think "long wire", think "antenna"   smiley-twist
18103  Using Arduino / General Electronics / Re: What are transistors. on: July 31, 2011, 02:50:59 pm
Why is a question about transistors a poll?
18104  Using Arduino / Programming Questions / Re: Format String on: July 31, 2011, 02:42:44 pm
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How do you define, reliably, how long to wait for another character to arrive?
It is really, really simple.
And it doesn't use delay.
18105  Using Arduino / Sensors / Re: SENSOR PING))) QUESTION on: July 31, 2011, 02:40:14 pm
Code:
if ( pingPin,_______________ )
I don't understand what this is meant to signify. It doesn't look like C.

Please will you go back over your earlier posts, highlight the code, then click on the # icon. Then click "save".
Get rid of any "quote" tags, except where quotes are intended.
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