How to search for the schematics of a simple system where if a device is far away from the user , the receiver would sound an alarm warning to warn the user!!! Can i get samples of these components in TI??
Winson,
Please give me more specifics into what you're looking for so I can help you find your answer.
Brian,
Thanks for the reply,
I am looking to create something like a RFID system to detect the receiver when the user is walking away from the object. For example, i have my pen drive at the desktop, and i walk away forgetting to unplug it, as i walk further the system sounds an alarm and blinks the LED for instance, even faster as the distance increases.
I have researched that it is similar to a child tracking device, but this uses a gps system, and its too expensive to install.
My objective is to make it as small as possible, a respectable range for detection and also cost effective ,cheaper than the pen drive at least.
Thx regards
Winson
Winson, indeed, a RFID solution could do the job .... however there are several technologies available, each with different pro and cons. But all systems is common that they consist of an reader unit (requires power and an uC e.g. MSP430) and a Tag (batteryless). Depending on the object you want to detect a Low Frequency (134kHz), High Frequency (13.56MHz) or even an UHF (900MHz) solution can be used. As a first starting point I propose to have a look on our High Frequency (HF) reader and Tag products; there are complete solutions at a reasonable price available. Feel free to visit: http://www.ti.com/rfid/ For further questions, pls. drop me a mail and/or contact our local support. Thx regards Juergen email: j-mayer@ti.com
indeed, a RFID solution could do the job .... however there are several technologies available, each with different pro and cons.
But all systems is common that they consist of an reader unit (requires power and an uC e.g. MSP430) and a Tag (batteryless).
Depending on the object you
want to detect a Low Frequency (134kHz), High Frequency (13.56MHz) or even an UHF (900MHz)
solution can be used.
As a first starting point I propose to have a look on our High Frequency (HF) reader and Tag products; there are complete
solutions at a reasonable price available. Feel free to visit:
http://www.ti.com/rfid/
For further questions, pls. drop me a mail and/or contact our local support.
Juergen
email: j-mayer@ti.com
Winson -
As Juergen said, everything needs power and our passive RFID may not compeltly meet all your requirements with regards to size and power consumption based off what i think i understand you are wanting here - please feel free to check our RFID website or contact him or myself (i am in Dallas, in the SC building) for assistance - however if i understand the goal/use case, i would at first suggest perhaps keying off the RSSI value of the RF2500 kit as your pointer to where the user is in relation to the USB stick. The eval kit is very inexpensive and even comes with a GUI and all the docs, source code, etc. to demo what i think you want almost immediately. check out the link: http://focus.ti.com/general/docs/litabsmultiplefilelist.tsp?literatureNumber=slaa378b and the demo kit product page: http://focus.ti.com/docs/toolsw/folders/print/ez430-rf2500.html
let use know!
Best Regards,
Josh (josh.wyatt@ti.com)
BR-
Josh
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