Marcel van Lieshout wrote:

>My ultimate goal is a range of at least 5 meters with a repeatable accuracy
>of 1 millimeter. Yes, I know one should have goals that can be met ;-)
>
I like that attitude, ...
... but ever calculated what the wavelength of a 40 kHz sound wave is ?
340 m/s  , 40 kHz  --->  ...... ;-(
And then I don't even talk about the change of sound speed due to
temperature and humidity !

>BTW it's my first PIC project (exept for the blinking led thing), even
>worse: it's my first embedded project.
>
And of course you are going to program it in assembler ?
And program the PIC with a selfmade programmer ?


Stef

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