RFID Triggered Presentation Box

February 11, 2011 by Mike Nathan 12 Comments

blasphemous_bible_box

[Lace] needed to build a “box project” for his college art class and figured he could spice things up a bit by adding some electronic components to the mix. His project, dubbed the ‘Blasphemous Bible Box‘ consists of a bible opened up the section of the book of Revelations that discusses the mark of the beast in an old cigar box. The box is normally locked, but has been programmed to unhook an internal latch when he passes the RFID chip embedded in his hand over it. The effect could have been achieved using a simpler circuit, but the enclosed Arduino seems to do the job decently enough. [Lace] has not mentioned if he has considered revising the box any, but a spring-loaded external latch secured with a magnetic lock would make for a nice effect if version 2 was ever built. Adding a servo to slowly open the box as well as including a speaker blaring Carmina Burana – O Fortuna upon opening would be pretty cool as well (hint, hint). We have video of the box in action after the break.

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Simple RFID Access System Clone

February 7, 2011 by Mike Nathan 7 Comments

rfidbboards

A few months back, [John] was reading an article about a simple RFID security system kit, and decided he would like to build one himself. While many of the system’s details, including full schematics were provided, he was dismayed to find that the source code for the project was not published as it was held under copyright by the manufacturer. Believing that open source is better, he modified the original design, replacing their PIC controller with an ATmega328 armed with an Arduino bootloader.

His system replicates all of the original kit’s functionality, while offering plenty of opportunity for modification beyond the initial design. The article contains a complete parts list, wiring schematic, and the Arduino code required to get things up and running. He even has a video of his clone at work, demonstrating the acceptance and rejection of RFID tags as well as the system’s learning mode.

Yet Another Cat Door

January 24, 2011 by James Munns 11 Comments

Cat Flap Fever

RFID cat flaps are one of those projects we see all of the time. They are generally pretty simple to rig up, not too expensive, and have a good “wow” factor for any non-technical friends or family, not to mention tremendously useful. Why did we decide to share this one? Well, for one, it is simple. It doesn’t tweet, email, or text message, it just gets the job done. Two, it is excellently documented, including a detailed parts list and a step by step schematic just about anyone could use to build their own. [landmanr] does mention that he recommends some sort of project enclosure to protect the electronics from damage, which would be bad for the poor cat stuck outside.

Building A Security Access Panel

December 31, 2010 by Mike Szczys 14 Comments

It turns out that hacking together a security keypad is remarkably simple if you know what you’re doing. [Don] needed to add a keypad with an RFID reader on it. He had previously built a USB RFID reader and thought he could integrate those concepts into the new unit.

He once again started with a serial to USB converter and removed the voltage converter IC for later use since he doesn’t need TTL levels for this project. The keypad is a USB product and it turns out there’s a hub inside. With plenty of space inside for the serial converter PCB and a blank spot at the top where he mounted the RFID reader, he adding a few passive components to wire it up and connect it to the hub. The only connection is the original USB cord but the PC will detect both the keypad and the converter.

Keep Your Kids In Line With A Time Clock

December 19, 2010 by Mike Szczys 68 Comments

When the cat’s away the mice will play, but a least you’ll know when they came home if you use this time clock. It’s called the Kid-e-log and [John Boxall] developed it to help a friend who wanted to keep track of their teenage children’s after school activities while they were still at work. He figured having them punch a time clock would at least let you know if they came straight home as they were supposed to. An RFID tag was issued to each (no, they didn’t implant the tags) and used to record the time. To keep fraud to a minimum the hardware has a battery back-up for its real-time clock, and the tag read events are stored to EEPROM for retention between power cycles. This doesn’t prevent common tricks like taking the reader with you, or sending your tag with a sibling, but it’s a start. See it in action after the break.

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RFID Spoofer With Code And Instructions

November 28, 2010 by Mike Szczys 11 Comments

Here’s a field-programmable RFID spoofer developed by [Doug Jackson]. He was inspired by the spoofers we looked at near the end of September that didn’t have source code available. With the idea seeded in his mind he figured he could develop his own version, and then decided to share the build details with the rest of us.

The tags that he purchased for testing and developing the spoofer have a code printed on the back of them. A bit of sleuthing at the data from a tag reader and he managed to crack the code. From there he built this tag spoofer with a keypad on which you enter the number from the back of any 125 kHz tag and the device becomes that tag. If you have been waiting to test your RFID hacking skills there should be nothing holding you back now that [Doug] shared the details of his own adventure.

Your Mobile Phone, Now With 100% More RFID

November 7, 2010 by James Munns 15 Comments

More and more today, it is becoming harder to avoid having some sort of RFID tag in your wallet. [bunnie], of bunnie:studios decided to ease the clutter (and wireless interference) in his wallet by transplanting the RFID chip from one of his subway cards into his mobile phone. Rather than the tedious and possibly impossible task of yanking out the whole antenna, he instead pulled the antenna of a much more accessible wristband with an RFID chip of similar frequency instead. Nothing too technical in this hack, just a great idea and some steady handiwork. We recommend you try this out on a card you haven’t filled yet, just in case.