Rangefinding project (a little help required)

[johncameron]

It was the wiring seemed slightly counter intuitive, the black (0V i though) is now connected to c.2, with the red into +vcc and the brown into the 0v rail

i tried every other combination after that and the current one is the only working one.


the voltage does seem off....and its strange, the voltage goes from 3.55--to--1.6--back to 3.55, over a range of 8cm, to 20cm, to 80cm, really very strange...

not entirly sure how to tackle getting that sorted out....however, i am happy it is "working" haha,



"similar triangles" ? so calibrating it so say a +0.1 volt jump = 1cm so it is reporting an accurate range? anybody got any help on that, because i genuinly dont have a clue :P

[eclectic]

Some possibilities that may help (or not :-)
http://www.basicx.com/Products/robot...urve%20fit.pdf

Pages 4 + 5 of
http://www.sharpsma.com/webfm_send/1203

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