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  • Не мога да се ориентирам, дали това е отговор на моето запитване от преди малко и дали мога да отгов... more...
    06.04.17 20:22
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    29.03.17 21:57
  • hello sir good evening sir actully i have purchased your application and i have programmed the ardui... more...
    25.01.17 20:32
Frequently Asked Questions for RFID emulator

( 32 Votes )

 

What are the types of RFID cards?

Running on Low Frequency (LF)

Frequencies between 30 kHz and 300 are considered low. LF RFID systems typically operate at 125 kHz, less - to 134 kHz. LF devices have low-speed data exchange between the id and the reader, but are very stable in the vicinity of metal, liquids, snow, etc.. Stable behavior of these devices in an unfavorable environment is a very important feature of their conducive to widespread dissemination. LF systems operating at 125 kHz are the most common in Europe, system access control are the most typical application.

Running a High Frequency (HF)

Frequencies between 3 and 30 MHz. Standard frequency HF RFID system is 13.56 MHz. Among the disadvantages is the unstable behavior of 13.56 MHz tags near metal and liquids, but this does not preclude their use in many applications for tracking goods and assets, in libraries, in the textile industry, electronic payments and more.

Running on Ultra High Frequency (UHF) 

Frequencies between 300 MHz and 1 GHz. A typical frequency for passive UHF system. In Europe, between 865.7 - 867.5 MHz, U.S.: 902.75 - 927.75 MHz, Thailand: 922.25 - 927.75 MHz. Active UHF systems operate at 315 or 433 MHz. Fast data transfer and low cost are important identifiers of the advantages of UHF. The main disadvantage is their dependence on the environment, especially in noise performance in the presence of metals and liquids.

Operating at microwave frequencies 

Frequencies above 1 GHz. Standard used 2.45 or 5.8 GHz. Identifiers can be very small, the data transfer is faster than other frequencies, but metals and liquids are a serious obstacle to the use of microwave systems.

 

What is RFID emulator?

Often necessary we use RFID card to open the parking barrier or enter the office. In most cases it is white plastic with or without captions about the size of a calling card that serving in the receiver and trigger specific site you access. But as each key, it can be lost and it is good to have a copy and have spare keys. Then comes the need for RFID emulator. The device is a small printed circuit board the size of a standard smart card (ISO 7816-1), which is a scheme developed here has the ability to record inside information already existing map without the need for connection to a computer or complicated procedures.

 

What is it?

The device have 2 buttons and LED.

Button 1 – PLAY used to play pre-stored map.

Button 2 – LEARN is to record a new memory card in the device (if successful recording a new map that was last recorded is automatically deleted).

LED - LED lights only when the device is in the LEARN mode and new map fails to successfully register the device.

 

 

How to use

Look at the videos below:

 

Elementary. Just put the board on the road between the card you want to copy and receiver (eg a sensor barrier).

Since the board is not self-contained power supply, ie using the induced magnetic field and use it for their own power must be as the board firmly between the receiver and the card that will copy.

 

When will not working?

In RFID communication has many kinds of encryption and constantly developing new and new algorithms. This device works on most cheap and most high-profile devices to control access. Communication frequency is 125 KHz, so if for some reason you know that your card is the same, you have a great chance to work with you, but in any case not 100% sure.

 

How do I know if it works for my card?

Since there are different types of cards with different frequencies of operation, there is NO 100% GUARANTEE that the device will work in your case your card. The only way to ensure this is to make sure that the card is running at 125kHz or most probably to test a specific card you want to have a backup, using the method described below.

The unit should be delivered to the receiver and pressing PLAY. If the receiver responds with a beep or light indicator, red svetodiod or X (access denied) so the receiver can detect and future playback on your individual card. / Since the original purchase in memory has recorded a random map for you to perform the test - but it is not yours and is not listed on the particular receiver - do not expect to get access / access will be provided only if the serve real card or device to actually copied card for that location.

 

How to learn it for my card?

    1. Serve device to the receiver but before you press LEARN. (Because the emulator has no battery and is powered by the receiver strive to not further from during the training process).
    2. Once you have approached him - run button held earlier (LEARN).
    3. Presenting the card on the device (DO NOT emulator away from the receiver to the last step of course), and keep the card and the device to another one closer to the receiver (emulator behaves the card to the receiver - so stand in the way of information exchanged between the card and receiver). If you need a little map rearrange, rotate or slightly shifted in either direction (may be contact), and so for a few seconds there should be a result. If it happened successfully LEDs will light up.
    4. If the LED lights up and remove the card from the receiver emulator done with the setup. You now have two completely identical cards, and the other one your device. You can test it again closer to the receiver and press PLAY.

 

If not any of these steps fail to train your card emulator simply walk away from the receiver for 10-20 seconds. press 1 and 2 several times (no strict order) and try again from the beginning (step 1).

 

Schemes which application is freely released on the internet and I am not their author. I'm just an amateur who developed the device and confirm its correct operation. To supply other electronics lovers like me, I run the scheme in the form easy to understand and its eventual development. In no nasal discharge abuse by malicious individuals and not tolerate people who would use the device for unlawful purposes. Internet is free virtual space for expression, and who and what would use it, is entirely his responsibility.

Thank you.

The author of the article and the site is not responsible for malicious acts by consumers using the device for unlawful purposes for use of false identities and more. However, the Internet is a free space, and the information in it (true or false), and everyone decides what is used, therefore everyone is responsible for their actions and intentions. TAGGED: This article is for educational and research purposes. Use at your own risk!

 

For more questions visit: Forum of article

 

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