Danie van der Merwe on Nostr: npub138xqt…hpcnq ok let me know if you find it - thing is NFC on cards is passive ...
npub138xqt2h03sees2rtlu7y98llgv2y5yr5d3ypefcw49kf036pgt3sxhpcnq (npub138x…pcnq) ok let me know if you find it - thing is NFC on cards is passive so really very little range at all in the first place. The antenna also needs to match the exact frequency to be effective harmonically.