Read Digital icon Read Digital — Read TTL digital input from an ARC I/O port; real-time red/green status for low (0V) or high (+3.3/5V), selectable board/port and read interval. Try it →

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Holland
#2  

Is there a small and big version

#3  

Nope.

If you're lucky. You can get the nikko web cam or the nikko projector. One cost 300 and the latter cost 45 hundred.

the Hasbro is your best bet.