Tagged Questions
2
votes
3answers
80 views
Wireless communications for distance estimation (RFID perhaps?)
What I want to do it is measure the distance between two points/ devices which are constantly moving apart or together. The value for distance isn't really required I'd just be looking to have an ...
2
votes
1answer
170 views
The reading distance limit on passive RFID
It appears that nearly all "passive RFID" tag-reader combinations have around a 5-10cm specification for reading distance.
But I am interested in approx. 20 cm reading distance.
I am assuming one of ...
-1
votes
1answer
222 views
Combine a small pet chip reader and digital weighing scales using arduino [closed]
Firstly I would like to apoligise for my complete naivity.
I have absolutly no idea about electrical engineering, but I would like to create a product for a school project that combines a universal ...
0
votes
5answers
200 views
Ideas for tracking individuals in a building
I apologize if this question is inappropriate for this forum, but I'm coming up short in my research.
The problem is as follows: I would like to find a network of devices capable of tracking people ...
11
votes
3answers
507 views
What's the purpose of such weird wiring inside this smart card?
Here's a scan of a stripped MIFARE Ultralight smart card
That's some plastic film with (I assume aluminum) foil wiring acting as the antenna for both powering the chip and providing radio ...
0
votes
2answers
218 views
RFIDs versus Bluetooth
In terms of object tracking, I'm working on making a small device/tag that uses bluetooth technology to keep track of objects but a friend told me about RFIDs which are supposedly cheaper and also ...
1
vote
1answer
349 views
What's the technical limit to how small RFID-like system antenna can be?
So far I haven't seen a contactless smart card smaller than a standard credit card. My "biometric" travel passport holds a chip powered off the antenna - I lit the plastic holding the chip through ...
