Hi Andrew,

I have a couple of pages for you to check out:

http://www.hobbyrobot.com/info/gp2d02/index.html

and

http://www.people.cornell.edu/pages/shb7/ranger.html

The first is an appnote (rather long,but you can just skim it to get an
idea) about a sensor from Sharp which uses IR to measure distance in
exactly the range you mentioned (a few cm to about 1.5 meter) and sends out
the data serially. The note shows how to interface it to a PIC and a BSII.
The sensor costs about $30 and can be purchased from HobbyRobot.com Yeah,
it is kinda expensive, but it does work reliably and it is quite small.

The second is an ultrasonic ranger that I designed and built a couple of
years ago. Mine worked out to about 2.5 meters. The design could be
improved but I thought it might give you some ideas, especially if you are
a do-it-yourselfer like myself.

Sean

>Hi Everybody,
>
>
>I am new to this PIC business and I am trying to use it to build a
distance meter with a range >from a few cm's to a Meter or so.  Any tips on
where  I may get any example source code or >pointers.
>
>Thanks for your help
>Andrew

|
| Sean Breheny
| Amateur Radio Callsign: KA3YXM
| Electrical Engineering Student
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Personal page: http://www.people.cornell.edu/pages/shb7
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