All Questions
9 questions
0
votes
1
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161
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SRIX4K Emulator - ASK transceiver
I'm trying to build a simple SRIX4K emulator using an ATMEGA328p, I found this circuit on the internet, and it should work as a simple ASK transceiver, using the MCU to transfer data using the SRIX4K ...
1
vote
1
answer
243
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Why do lower frequency RFID readers have a smaller range for reading tags?
Low frequency RFID readers only go a few inches. UHF can read much farther (on the scale of meters). As far as I know, lower frequency waves of the same energy actually radiate better/farther.
Is ...
- 81
2
votes
1
answer
2k
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How can I direct an RFID reader to only read in a specific direction?
I'm trying to control the reading direction of an RFID reader, to only read in a specific direction.
I made a drawing to exemplify my question.
In the image you can see the setup I want to have. The ...
- 135
1
vote
4
answers
1k
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What are the basics I need to know to power LEDs with RF at a range of 30 feet?
I would like to light up a path in the woods with hundreds of LEDs using RF. The idea is that I would carry a RF transmitter powerful enough to light LEDs. As I approach the LEDs would get brighter, ...
- 19
1
vote
1
answer
100
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How to detect several agents within a radius, what is the best and easiest way to do it?
I have a room with 30 objects which may or not be present, and I want to be able to detect which objects are in the room.
My first idea was to attach a RFID tag to each one of these objects and have ...
- 471
2
votes
1
answer
11k
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Determine the working frequency band of unknown RFID chip
I have a passive RFID chip from which I would like to scan the ID.
I have a standard USB RFID Reader, but this doesnt print out anything. This reader scans the 120–150 kHz range, so the chip must use ...
- 335
0
votes
1
answer
94
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Can RFID readers submit scanned data to one location?
Let's assume that I have lots of RFID readers, is there a way, either a specific product or peripheral that allows the reader to send data about the tag it scanned over a distance of about 500m - 650m ...
- 103
6
votes
1
answer
517
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Faraday Cage - Detecting one
I am looking for a cheap and easy way of creating a small electronic device that is capable of detecting whether or not it is inside a Farraday Cage.
Hopefully, without an external sensor/emittor.
- 182
0
votes
3
answers
170
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What is "RFIS" tag
I read somewhere about "RFIS" tag. I know what is "RFID" but does something called "RFIS" exist? I tried to search but all suggestions are RFID related. Would be nice if you have any clue share it ...
- 3,294