Hurra Richard! Wofson WM8753 ; ) doing distance messuring with ultrasonic?

[Richard Franks]

On 12/12/06, Robert Michel <openmoko at robertmichel.de> wrote:
> Doing distance messuring with ultrasonic?
> ;))
> 40kHz example:
> http://www.parallax.com/dl/docs/prod/audiovis/Distance28015.pdf

Interesting article... 3.3m ping is not insignificant, especially in
dark/smoke-filled environments. I remember doing something similar
with LegOS (using the infrared port) with the original LEGO
Mindstorms.

I wonder if you could also defend against bears or dogs by playing
with these frequencies.. mind you, 6m away from a grizzly, that UI
better be clean and fast. No pressure ;-)

Richard