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1  Forum 2005-2010 (read only) / Forum / Single Post on: July 13, 2010, 09:33:33 pm
Hi I'm making a post here so the website will stop jamming up when I try to post a hyperlink in my first message.

Granted, I understand why you do it, but it also seems to have a bug where I can no longer preview/post the message without reloading the forums.

Anyway, problem solved now.
2  Forum 2005-2010 (read only) / Interfacing / Re: Arduino RFID (Parallax?) Project  - Advice Wanted on: July 14, 2010, 03:34:51 pm
Any thoughts on UART vs Weigand?  They're just the output protocol of the reader, correct?
3  Forum 2005-2010 (read only) / Interfacing / Re: Arduino RFID (Parallax?) Project  - Advice Wanted on: July 14, 2010, 01:36:14 pm
Thanks everyone for your input and information.

'Throwing away' my current fob (or at least not using it) has always been an option I was considering.  I didn't pick it, it's used for access elsewhere, I just thought it would make sense for me to read/code it for my project instead of having more than one fob to carry.  (Assuming it wasn't too expensive.)

It sounds like if I wanted to spend ~$80 on a reader, I could get one of these: and try and get it to work with my current fob.

But it also sounds like if I wanted to buy a ~$50 kit which would include a Parallax reader + keys that I know would work with it, I should go with

As I said before, I think there's already sample code for the Parallax reader working with the arduino, and some projects that I could mimic, but there appear to be different models of the Parallax reader, does anyone have any advice on the differences?
4  Forum 2005-2010 (read only) / Interfacing / Re: Arduino RFID (Parallax?) Project  - Advice Wanted on: July 14, 2010, 07:11:08 am
Any idea how I could go about figuring out what type/sub-type of fob I have?

All I have was the link (which has a datasheet pdf) which said it was a 125Khz fob.  Does that at least narrow it down?
5  Forum 2005-2010 (read only) / Interfacing / Arduino RFID (Parallax?) Project  - Advice Wanted on: July 13, 2010, 09:34:34 pm
Hello all,

I'm new to Arduino and RFID but I'm not new to programming, microcontrollers, and breadboarding/soldering.

I'd like to purchase my first Arduino for a project where I can use an RFID keyfob to unlock a door (to start), but I'm not 100% sure on the details of how the arduino works with the RFID.

As I understand it, there's a popular 'Parallax RFID reader' that the arduino already has sample code to work with.  Any idea if it would work with my existing RFID keyfob, the I read that there's at least two basic models for the RFID keyfobs and they're completely incompatible with each other.

I'm hoping to get my current RFID keyfob to work (though it's not an absolute requirement, it just saves me time) but that also means that I have to be able to figure out its ID#.  So I assume that I just need to hook up the arduino to an LCD and RFID reader and have the code on the arduino display what ID# it sees?

Then, assuming I want to start out basic and only check against the single RFID that I have, just add that number to a 'if true' statement that would perform the required mechanical action?

So far I'm looking at getting an Arduino, Parallax RFID reader, LCD arduino screen... and that's about it.  I'm sure I have most of the 'basic electrical components' that I would need, wires/resistors/etc.

Any advice, insight, links, etc, that people can offer me would be appreciated.  I'm not looking to get super complicated on this yet, I'd be happy with just ordering the basic parts that I'll need.

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