Posts Tagged ‘radio signal’

How to build your own RFID reader

Thursday, April 22nd, 2010

DIY RFID

Do you have any idea on how easy it is to build your own RFID reader? Well, we stumbled upon some sites that’ll give you some clearer picture on how to make this thing happens. As pointed out by hackaday,

[Klulukasz] left a comment pointing to this DIY RFID reader that was a final project in 2006 for a class at Cornell University. It is well documented and includes not only a schematic and code, but an explanation of the design considerations used during the build. The project uses an ATmega32 and the parts list priced out at about $50 at the time. There were plenty of responses to theRFID spoofer post pointing out that there are readers available for $40, but we want the fun of building our own.

A bit more vague with the details but no less interesting is this other simple RFID reader design.

Courtesy: hackaday

See through walls via wireless network

Sunday, October 4th, 2009

Researchers at the University of Utah have been able to detect movement in a room based on variations in wireless signals. Accurate to about a meter, they are using a 34 node wireless network to do their sensing.  As a person moves, they change the signals, and can therefore be detected. They state one possible application being rescue workers deploying multiple wireless nodes around a building to find people located inside.

source: gizmodo, youtube