i just discovered that it seems as though the wizarding world interactive wands seem to have an IR reciever and not a reflector which now makes me nervous to crack into it (for even aesthetic reasons, let alone exploratory) but they don’t talk about batteries anywhere? which, even the RFID disney bracelets do talk about. (which tbh i’m surprised they’re not passive.)
can you have a passive circuit with a reciever?
i wish i knew how this fucking system worked beyond “it’s IR-based”