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Description: RFID (radio-frequency identification) is the wireless non-contact use of radio-frequency electromagnetic fields, for the purposes of identifying and tracking tags attached to objects. This is the ID-20LA, a very simple to use RFID reader module from ID Innovations. With a built in antenna, the only holdup is the 2mm pin spacing (breakout board available below). Power the module, hold up a 125kHz card, and get a serial string output containing the unique ID of the card.

The new ID-20LA is essentially the same as the older ID-20, but has a lower input voltage.

Features:

  • 2.8 - 5V supply
  • 125kHz read frequency
  • EM4001 64-bit RFID tag compatible
  • 9600bps TTL and RS232 output
  • Magnetic stripe emulation output
  • Read range of 180mm

Dimensions: 38x40x7mm

Documents:

Comments 10 comments

  • How does the magnetic stripe emulation output work? Is the output a waveform which could be read using the audio jack of a smartphone (just like the square reader reading magnetic cards)?

  • This reader is malfunctioning for me. Is there any way I could get it replaced?

  • In the video he’s reading 12 digit codes. Does this chip support 15 digit codes?

    • The datasheet specifies that it will output 10 ASCII characters that is in hexadecimal, the next two characters are just a checksum and doesn’t actually make the code any more unique. So… I guess the answer is no.

      • Hmm, now that I look more closely, the “15 digit codes” I’m interested in are 15 decimal digits. Unfortunately I think that still works out to about 13 hex digits…

  • Can you right rfid cards with this.

  • So, does this mean that I can use this directly with the raspberry pi?

    • If you power it directly from the 3.3v (or 5v it looks like?) out of the Raspi, it should work. Skimming through the data sheet I didn’t see the current draw, but I doubt it’s too much, as long as you’re not leaving cards in ‘range’ for very long.

      • Since the Pi inputs are 3.3V, you probably should go with 3.3V to power the ID-20LA. At 3.3V, the ID-20LA current draw is about 18 mA both when idle and when a card is in range. At 3.3V the range is reduced to about 5 cm (using a card type RFID tag). At 5V, the current draw is about 27 mA, and the read range is 7 to 8 cm using a card tag.


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