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1  General Category / General Discussion / Arduino Trademark on: February 13, 2014, 03:11:03 am
So it seems that one cannot use the arduino name in a domain name. I didn't know that, I got informed about this after running a website for 18 months...

There  are literally thousands of websites that do this.

Not sure yet if I want to continue running my website, by changing its name.

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innersky
2  Community / Products and Services / Re: Industruino - DIN-rail Leonardo compatible on: March 01, 2013, 06:50:08 am
Any news on the ethernet part? I'm very interested in that as I'm planning to do a home automation project based the Industruino.
3  Using Arduino / Audio / Re: Play .wav file from SDcard (ethernet shield) on UNO on: July 12, 2012, 02:49:55 pm
I think you need a DAC to playback sounds. More info here : http://www.sparkfun.com/tutorials/160
4  Using Arduino / Networking, Protocols, and Devices / Re: NRF24L01 transceiver and 315/433MHz RF links on: June 28, 2012, 01:47:46 am
There are a few things to consider:

The first is more software/hardware - the NRF24L01 uses a proper protocol, is controllable via a library and probably has some handshaking and error checking/correction.  I'm not entirely sure what the 315/433MHz ones are, they may or may not include these things, or it may be that they are literally a transmitter and modulator, and you have to provide the data that's to be sent.  In terms of implementation it might make it more difficult/challenging, and if you have multiple devices you might not be able to distinguish between the two.

The second is more the nature of the EM waves they emit.  Generally speaking, lower frequency means lower power, better penetration, and longer range.  So the 314MHz/433MHz transmitters may perform better in situations where there isn't a direct line of sight etc.  However, an efficient antenna at 2.4GHz is easier to make on a PCB, so performance may be equal.


One last thing is that as you're looking at *cheap* solutions (i.e. not sparkfun branded), the actual implementations may vary.  Someone may have a decent NRF24L01 and get great performance, and someone might have a badly made one and find it's not satisfactory.  But I guess that's the nice thing about cheap components, if they work then great, if not then you aren't losing much for them to go in the parts drawer and for you to buy something better.  For the project you have described however I would imagine that both will perform well.

I've noticed that dealextreme recently started selling a very cheap NRF24L01 version. (other than displayed) I wonder if they're any good...

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Bart
5  Using Arduino / Networking, Protocols, and Devices / Re: NRF24L01 transceiver and 315/433MHz RF links on: June 27, 2012, 05:47:26 am
While I did not yet used it myself, I'd avoid the 315/433MHz RF as they are less reliable. (at least, that is what I read about using these frequencies)
I plan to use the NRF24L01 myself extensively, as soon as I can find some spare time :-)

PS you can find a real nice implementation for the NRF24L01 here : http://maniacbug.wordpress.com/2012/03/30/rf24network/
or here some hello world examples: http://maniacbug.github.com/RF24Network/examples.html

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hth,
Bart
6  Using Arduino / Project Guidance / Re: Arduino as USB stick? on: May 10, 2012, 04:54:23 am
I found it  smiley

Atmel and Arduino will be demonstrating several platforms in the Atmel-sponsored Arduino Pavilion including:
Arduino Leonardo. Based on the Atmel ATmega32u4, it is a low-cost Arduino board which includes a simpler circuit as the Arduino UNO board. The software on the board includes a USB driver that can simulate a mouse, keyboard and serial port. In addition, the bootloader includes a serial port and USB mass storage driver.

from http://www.atmel.com/about/news/release.aspx?reference=tcm:26-35030
The upcoming Leonardo will support it.

Thank you for the responses.
7  Using Arduino / Project Guidance / Arduino as USB stick? on: May 09, 2012, 04:32:40 am
Hello,

Does anyone know if an Arduino board can act as a USB memory stick? Suppose you connect a SD card to the board, is it possible to use it so you can see/delete/add files on the connected SD card when plugged in the computer? If this is not possible, will it be with the upcoming Leonardo as it has usb host functionality?
I've searched Google but did not find an answer.

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Thank you
Bart
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