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We will be closed on November 25, 2021 and November 26, 2021 in observance of the Thanksgiving holiday. We will resume normal operations on November 29, 2021. Wishing you a safe and happy holiday from all your friends at SparkFun!

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Receive a free SparkFun USB Thumb Drive with every order this weekend. Details.

Member #264211

Member Since: November 6, 2011

Country: United States

  • You could try using UHF RFID. It's passive and a sticker would be affixed to the bottom of the disc. The max range is 23feet so you need to be reasonably close to the lost disc while searching. This is an example of a UHF reader: https://bityl.co/8QIi

No public wish lists :(