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Frequent Maker and Roomba hacker extraordinaire Tobdbot writes –

The Parallax RFID reader is a pretty cool bit of tech. For $40 you get a reader with integrated antenna that outputs ASCII at 2400bps. Unfortunately, the integrated antenna means you can’t place RFID tag sensing in tight spaces. You can however circumvent the built-in antenna and add your own. With a remote antenna of your own creation, you can customize its size and shape to fit your application.

Adding a remote antenna to Parallax’s RFID reader – Link.

From the pages of MAKE:
Make 969
RFID for Makers. MAKE 06 – page 162. Build this kit to read radio frequency ID tags. From the column Theory & Practice. Subscribers–read this article now in your digital edition or get MAKE 06 from the Maker store – Link.