
by MacroLensgithub.com/MacroLens/NFC_F91W
This is a mod for the Casio F91-W to include a 125kHz NFC chip, specifically the T5577. The goal of this was to create a working tag that would fit in the watch with no modification to the outer case and water resistance.

Imported from a public repository by MacroLens. View the source
MIT — MIT: reuse and modification are permitted, with attribution to the original author.
Is this yours? Claim it by signing in with the GitHub account it was published from.
Boards whose names, descriptions and tags overlap most with this one.
heypcb keeps a picture and the design files for this board, and there is no project behind this page until somebody opens one. Opening it makes a copy on your own account — the original stays where its author put it.
Radios and SDR, LoRa and Meshtastic nodes, antennas, GNSS, ham gear.