Em 29/2/2012 08:52, David Duffy (AVD) escreveu:
> On 29/02/2012 9:45 PM, IVP wrote:
>>> Has anyone ever interfaced these off-the-shelf
>>> sensors to a PIC?
>> Popular in robotics. Google ultrasonic robot
> Yeah, already played with the robot ones.  They are open transducers. =20
> The sealed ones need a lot more drive level it seems.
>
> I guess my question is really two-fold;
>
> A) Does anyone have a reasonable reference design for interfacing to the=
=20
> sealed parking type sensors?
>
> B) Is there some basic code out there that shows what's required the=20
> ping and receive?
>
> There are lots of Google hits for unsealed Tx-Rx pair system, but not=20
> much for the sealed all in one units.
> David...


I measured several parameters of the one I bought from China (frequency,
pulse width, number of pulses, etc.). I can send the results if I can
find them...


Isaac

--=20
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