SparkFun Electronics will be closed in observance of memorial day on Monday, May 29th. We will resume normal business hours on Tuesday, May 30th. Any orders placed after 2pm Mountain Time on Friday, May 26th will process and ship out on Tuesday, May 30th.
micah
Member Since: April 4, 2008
Country: United States
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If this does turn out to be a 125 kHz HID card, they’re pretty easy to read and emulate. I built a really simple homebrew HID card reader a while back as a garage door opener, and just for fun I built my own emulated HID card using just an AVR and a coil.
Here’s a schematic and details on the HID card reader. It’s just a Propeller microcontroller and a few passive components:
http://forums.parallax.com/forums/default.aspx?f=25&m=287204
And this is a blog post on the AVR firmware that emulates a HID card:
http://scanwidget.livejournal.com/32928.html
Cheers, and good luck on your quest to carry fewer things (and take more of them apart)!
–Micah -
I’m really happy to see these at Spark Fun. I’ve bought these from Parallax before, and I can vouch for how amazing these chips are. Response time is very fast, and the overall noise is quite low.
I used two of these as servo feedback sensors to build a laser projector out of hard disk voice coils:
http://www.flickr.com/photos/22238428@N05/2932267038/
No public wish lists :(