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541  Forum 2005-2010 (read only) / Bar Sport / Re: LED cycling on: November 30, 2009, 10:39:53 pm
Did you try searching the forum? This has been discussed a few times.

Here's an excellent thread with experimental results (and explanations) of how quickly an Arduino can toggle a pin.

http://www.arduino.cc/cgi-bin/yabb2/YaBB.pl?num=1230286016

Of course the answer depends on how you toggle it - using arduino-native digitalWrite() commands is much lower than using assembly code.

If fact you could get it to toggle millions of times per second - 4 million times if you use a 16MHz clock and assembly code. Using digitalWrite() would get you one hundred thousand or so per second.

Even if an LED could toggle this fast, your eye wouldn't be able to see it :-)
542  Forum 2005-2010 (read only) / Bar Sport / Re: SPARK FUN FREE DAY on: January 07, 2010, 11:07:46 am
Cart no longer loading for me...

It's 3am!
543  Forum 2005-2010 (read only) / Bar Sport / Re: SPARK FUN FREE DAY on: January 06, 2010, 09:13:46 pm
Hey guys!

The just said that it has been canceled!

You should totally just trust me and not check their website or anything.

Trust me!

:-)

544  Forum 2005-2010 (read only) / Bar Sport / Re: SPARK FUN FREE DAY on: December 17, 2009, 10:10:22 pm
3AM for me... could be interesting
545  Forum 2005-2010 (read only) / Bar Sport / Re: F*** THIS S*** --> Something needs to be done.. on: December 16, 2009, 09:35:49 pm
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My only request is a thread subscription setup like most forums I am on (99% are vb) In most cases if I find info that I feel is interesting or may be needed in the future I like to easily be able to find it again.

You mean like the "Notify of Replies" button at the bottom of each thread?

It's here  
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546  Forum 2005-2010 (read only) / Bar Sport / Re: Rant! 1st msg on: December 28, 2009, 08:24:39 pm
Also you can EDIT your first pot to go back and include the URLs
547  Forum 2005-2010 (read only) / Bar Sport / Re: Reseller Reputations on: November 12, 2009, 09:41:11 pm
If you search the forum there are lots of discussions about various resellers.

The futurlec one in particular is quite long. They seem to be cheap, but slow in postage. This seems to be unacceptable to some, but a fair trade-off for others (including me).

Never heard anything but praise for the other shops you mention.

548  Forum 2005-2010 (read only) / Bar Sport / Re: Sheevaplug on: February 26, 2009, 09:30:43 pm
Yeah the $50 was a "future bulk-rate" price - i.e. educational/enterprise rate
549  Forum 2005-2010 (read only) / Bar Sport / Re: Cadsoft bought by Farnell on: September 24, 2009, 08:36:45 pm
Hmmm...

I'll be keeping my 4.16 and 5.0 zip files in a safe place.
550  Forum 2005-2010 (read only) / Bar Sport / Re: Two random and totally unrelated questions on: September 10, 2009, 06:17:37 am
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Apple's website doesn't say annihilation about a annual fee... and I alone see 2 programs - claimed and enterprise.

Pretty sure that's spam.
551  Forum 2005-2010 (read only) / Bar Sport / Re: Two random and totally unrelated questions on: September 07, 2009, 07:37:20 pm
Interesting.

I know that some manufacturers, which include sparkfun, pay a licencing fee. They may be slightly different though, as they do use the "Arduino" name.

I'm sure I read somewhere that ladyada pays a licensing fee or royalty to the Arduino guys for her Boaduino products - but I might be remembering wrong, and not sufficiently motivated to go searching.

Well if the developers get nothing from clones I double my support for buying "official" boards.
552  Forum 2005-2010 (read only) / Bar Sport / Re: Two random and totally unrelated questions on: September 07, 2009, 06:50:56 pm
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1.
Is there any reason why I would want to buy a real arduino rather than a cheaper clone?

To support the original developers - I don't know what kind of licensing deal they have with the companies that sell clones (e.g. seeed studio), but I can imagine they would get more dollars for an official arduino board.
553  Forum 2005-2010 (read only) / Bar Sport / Re: Identify RFID tags on: August 11, 2009, 06:14:31 am
Hmmm...

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IPICO improved the passive system by energizing the tags at 125 kHz to allow the tags to start charging at a further distance from the timing mats, and then the tags emit their numeric codes at 6.8 MHz

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How does it work?
The system is very simple. The tag contains a microchip and two antenna loops—one to “wake-up” the tag and the other to send its signal. When the tag comes into contact with the antenna mat, it wakes up and starts sending its unique signal again and again to the reader.
554  Forum 2005-2010 (read only) / Bar Sport / Re: Identify RFID tags on: August 11, 2009, 06:02:34 am
Very interesting, thanks again for your help.

Doing some research on those frequencies now...
555  Forum 2005-2010 (read only) / Bar Sport / Re: Identify RFID tags on: August 10, 2009, 05:52:44 pm
Well I can post an image of the outside - it just looks like a smooth plastic rectangle, approx 35mm x 25mm x 1.5mm thick.



Nothing visible from the outside - no sign of antenna loops or anything.

The manufacturer describes them as "IPICO dual frequency systems"

Thanks for your help!
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