maximum length of wire Arduino & shield


what is the maximum length of wire I can use between an arduino and shields of various kinds ? 100' ?

I want to put a motion sensor maybe 100' away from arduino ? TTL ?? PWM ?

thanks !


I'm a bit confused: a shield by its very nature sits on top of and is plugged directly into, its host Arduino.

Ok, I mean sensors, not shields !

Will the sensor have some smarts with it, say to send back a serial message? Or are you expecting to supply it with 5V (3.3V?) power & Gnd and take some kind of reading of its output?


I am thinking of something like this

thanks for your thoughts !