Can a smartphone transmit/receive 125KHz?

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SUMMARY

Smartphones cannot natively transmit or receive 125KHz RFID signals due to the absence of compatible antennas. While NFC technology operates at 13.56MHz, the required hardware for 125KHz communication is not present in standard smartphones. Users can, however, utilize external 125KHz RFID reader/writer devices connected via USB to Android phones for this purpose.

PREREQUISITES
  • Understanding of RFID technology and frequency ranges
  • Familiarity with NFC (Near Field Communication) principles
  • Basic knowledge of smartphone hardware capabilities
  • Experience with USB connectivity and external device integration
NEXT STEPS
  • Research external 125KHz RFID reader/writer options compatible with Android devices
  • Explore the differences between NFC and RFID technologies
  • Learn about antenna design for low-frequency RFID applications
  • Investigate USB communication protocols for connecting external devices to smartphones
USEFUL FOR

Electrical engineering students, mobile developers, and anyone interested in integrating RFID technology with smartphones.

YanivW
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As part of my final project in my EE studies I was thinking if it is possible to read 125KHz RFID tags with a smartphone. I know it is possible with NFC (13.56MHz) and I was thinking about implementing a 125KHz reader. Is there any antenna in a regular smartphone that can deal with these low frequencies? I'm not talking about rather it is possible to use it for this purpose, but just to know if the required hardware exists.
Thanks! :smile:
 
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YanivW said:
As part of my final project in my EE studies I was thinking if it is possible to read 125KHz RFID tags with a smartphone. I know it is possible with NFC (13.56MHz) and I was thinking about implementing a 125KHz reader. Is there any antenna in a regular smartphone that can deal with these low frequencies? I'm not talking about rather it is possible to use it for this purpose, but just to know if the required hardware exists.
Thanks! :smile:
What have you found with your Google searches so far?
 
YanivW said:
I'm not talking about rather it is possible to use it for this purpose, but just to know if the required hardware exists.
It might, but I would not expect a phone to work below 10MHz. There will be a big difference between the small antenna needed on a UHF mobile phone and the wire loop antenna that would be needed for a 125kHz RFID tag.
 
There is no antenna in any common smartphone capable of that. On the other hand you could connect a cheap external 125kHz RFID reader/writer to the USB plug of an android phone.
 

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