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This is a simple, thumbnail-size RFID tag. These tags are great for sensing presence, identification, etc., and they're small, so they can be easily sewn into clothing or inserted into enclosures. Each tag comes with a unique 32-bit ID code and is not reprogrammable. The carrier frequency of this tag is 125kHz, so it works great with our ID-2, ID-12 and ID-20 RFID readers.
We tested this RFID tag with one of our ID-12 readers and measured a maximum read distance of about 32mm.
- 32-bit unique ID - non-reprogrammable
- 125kHz read frequency
- EM4001 ISO based RFID IC
- Manchester encoding
- Diameter: 16mm
- Thickness: 1.85mm
RFID Button - 16mm (125kHz) Product Help and Resources
SparkFun RFID Starter Kit Hookup Guide
May 5, 2015
Learn the basics of how to get started with the SparkFun RFID Starter Kit.
SparkFun Qwiic RFID-IDXXLA Hookup Guide
March 14, 2019
The Qwiic RFID ID-XXLA is an I2C solution that pairs with the ID-LA modules: ID-3LA, the ID-12LA, or the ID-20LA, and utilizes 125kHz RFID chips. Let's take a look at the hardware used for this tutorial.
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Customer Reviews
5 out of 5
Based on 1 ratings:
Perfect Size and Works Great!
Small enough to slip in my phone case and read through the rubber backing. Well worth waiting for it to be back in stock!
I'm trying to build a set of 30 (different ID's) blocks that communicate with another when sat side by side (each block is approx 30mm cube). My idea is to have a sensor in each block so it knows when it is sat beside the other, communicate with each other, and know which blocks are on each side (left and right on table). Then do something. Are there any RFIDs/sensors that will work for this so that I don't have to have a reader at one end of the string of blocks? Thank you!
Hey, I'm working on a similar project. Did you ever figure this out? I'm interested in hearing about your solution.
Do you plan to have a smaller tag?
1.6mm is just .1mm too big!
Thanks!
We do have the glass capsule tag which is smaller, have you seen that?
Yes, I did. Thanks.
But I need a tag I could glued on a 15x15 mm flat surface!
I'm afraid removing 0.5 mm on the periphery would damage the antenna.
hey. did you manage to find smaller tags ? I need even smaller one - 13x13 mm flat... I wonder if inside this tag there is clear disk with plastic border, which you can shave down. have you tried to open it ?
Can someone explain the differences between the 125kHz and the 13.56MHz RFID systems? Why use one over the other? Is one better for tinkering with?
WILL THESE READ THROUGH THIN ALUMINUM OR PLASTIC?
plastic should be fine as long as the tag is still within range of the reader. aluminum wont work as is blocks the signal.
What data rate do these transmit at?
Is it f/16, f/32 or f/64 (f being 125kHz)
From my research this changes from one tag to another.
Is there a way to extend its range little bit? maybe like 2 to 3 meters? I would love to make proximity door opener!
is there anyway to get a few holes like a real button or do i have to sew a small pocket around it
buy a couple, drill some holes, let us know if they work? :D
You could also use an epoxy and glue it to a button, though then you couldn't resew it.