hi again
thanks for the replies
that ping distance sensor looks possibly like the way to go for my needs. 2 cm to 3m is pretty much the distance i'm after
can i ask : what would i need to buy if i wanted to connect 8 or 10 to an arduino board? which board would you recommend for this purpose? would they all fit into the one board or would i need some kind of adaptor?
and then i guess i can link the board to a computer with max msp using usb?
again, many thanks