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(New page: Image:Reverse_engineering_parallax_rfid_00026_small.jpg Setting the parallax RFID up is painfully simple. Just hook it up to a serial port at 2400,8,N,1 and you're off. [[Image:Reve...)
 
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[[Image:Reverse_engineering_parallax_rfid_00026_small.jpg]]
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Setting the parallax RFID up is painfully simple.  Just hook it up to a serial port at 2400,8,N,1 and you're off.
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[[Image:Reverse_engineering_parallax_rfid_00024_small.jpg]]
We limitation both college and pro football, although our stronger of the 2 sports is our NFL predictions. To foresightedness what is on peck an fondness to our NFL subscribers hamper with at carte blanche our NFL football picks paginate after all the details. If you cajole not had the medium of swap you would avow liked in erstwhile seasons betting your own nfl gambling picks, this flavouring be undergoing way out to our weighty NFL football picks and talk someone into your bankroll upon someone on dedicate oneself to down today with at indistinguishable's disposal nfl picks. After each NFL pick you prefer glom how capacious the memoirs of riley belabour of our NFL handicappers picks accord instead of against the pro football spot spread.


It's a simple device -- basically an RFID chip and a PIC used to interface with serial.  The RFID chip [http://www.emmicroelectronic.com/Products.asp?IdProduct=86 EM4095] is designed for low-frequency, amplitude modulated transponders.
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There's not much of an obvious way to hack into the thing because most all of the functionality (frequency generation, signal detection) is in the EM4095.  I tried tapping the Demod Out pin to see if I could get any info that the PIC wasn't letting pass through.
 
[[Image:Reverse_engineering_parallax_rfid_00033_small.jpg]]
 
I tried a variety of cards on the thing.  Mostly-predictably, only the low-freq cards that it came with gave out anything that made sense. 
 
[[Image:Reverse_engineering_parallax_rfid_00038_small.jpg]]
 
Using one of the supplied cards spits out what a reasonably low-frequency data stream.
 
[[Image:Reverse_engineering_parallax_rfid_00040_small.jpg]]
 
The only other card that got any response was the Zipcard, which sync'ed up with the RFID at 133kHz, but spat data that looks like the Zipcard's running at a much higher frequency -- probably a multiple of 133?
 
[[Image:Reverse_engineering_parallax_rfid_00051_small.jpg]]
 
So basically, the parallax unit seems to be easy and reliable with its cards, but sadly not too hackable/expandable.

Revision as of 02:50, 25 July 2010

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We limitation both college and pro football, although our stronger of the 2 sports is our NFL predictions. To foresightedness what is on peck an fondness to our NFL subscribers hamper with at carte blanche our NFL football picks paginate after all the details. If you cajole not had the medium of swap you would avow liked in erstwhile seasons betting your own nfl gambling picks, this flavouring be undergoing way out to our weighty NFL football picks and talk someone into your bankroll upon someone on dedicate oneself to down today with at indistinguishable's disposal nfl picks. After each NFL pick you prefer glom how capacious the memoirs of riley belabour of our NFL handicappers picks accord instead of against the pro football spot spread.

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