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Replying to @josecastillo
(this is the open hardware NFC antenna design from N‑O‑D‑E’s Data Runner, https://n-o-d-e.net/datarunner.html. it would in theory work with the NFC sensor board that’s off at the fab right now. alas, that’s just a hole for the screen, tho it would be cool if transparent PCBs were a thing…)
(original)