Re: Ultrasonic sensor interactions

Hello Brian,

>    Specificly, I can not find a way to turn off the US sensor from the
> LEGO-provided SW environment. There may very well be some functionality at a
> lower level I don't have access to (at the moment), or LEGO themselves may do
> something about this (after all, for FLL it will be an issue).
>
That's easy to do in NBC, and not hard with NXT-G: to shut off the US sensor,
just "use" another sensor type on the same port. Here is a sample program that
switches the US sensor on/off with NXT enter button.
http://www.brickshelf.com/gallery/Philo/Misc/test_stop_usd.png


>> If the sensor actually pings 10 times a second...
>
>    I've not been able to exactly measure how fast the US sensor pings, but from
> simply (trying!) to count the barely audiable pings it seems around 10/second.
> But another interesting fact comes up when I do that - I can hear variation in
> the ping rate. 

At low level sample rate can be changed - and even a single shot mode is
available - but presently NXT-G doesn't give access to these features

Philo