[Lab] range finding

[Darcy Whyte]

Hi, I have one of these (I think)
http://ramshackblog.blogspot.ca/2012/02/ultrasonic-range-finder-using-sdm-io.html

It has four pins.

I've got it working using the code at that page. It measures really well up
to about 30cm then after that it just prints out 999 cm?

I noticed with a piece of paper I can get further (around 70cm).

It's supposed to be good for 150cm.

Any ideas what's going on here?

I have two of them and I tried the other one (in case it was a bu
component). But same result...


--
Darcy Whyte

Art+ inventorArtist.com <http://inventorartist.com/> | Aviation
rubber-power.com
Contact: darcy at inventorArtist.com | 613-563-3634 by appointment (no text)
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