Can an RFID Tag Be Used to Light Up an LED?

By RFID Journal

  • TAGS
Ask The ExpertsCan an RFID Tag Be Used to Light Up an LED?
RFID Journal Staff asked 9 years ago

Is it possible to use the technology for this purpose?

—Name withheld


At one of our events in 2005, ThingMagic gave out a little device that captured energy from a reader and lit up light-emitting diodes (LEDs) to indicate the relative signal strength. A single illuminated LED indicated a weak signal, while all LEDs being lit signified a strong signal. So it is possible to obtain enough energy from a passive ultrahigh-frequency (UHF) reader to light up an LED. In order to use a tag to accomplish this task, the chip must have an output port enabling a user to connect the LED. Some chips have this capability, but many do not.

—Mark Roberti, Founder and Editor, RFID Journal

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