Temperature messuring, simple fire alarm, anti-mosquito?Re: Hurra Richard! Wofson WM8753 ; ) doing distance messuring with ultrasonic?

Robert Michel openmoko at robertmichel.de
Sun Dec 17 18:43:43 CET 2006

Salve Richard!

On Tue, 12 Dec 2006, Richard Franks wrote:

> 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 think longer distances should be possible as well, especialy with
software calculations :) - e.g. how far away is the front of that 

To have accurate distance messuring a themomether could help...
but knowing a distance - e.g. the hight of a room, sound could be
used for doing temperature messuring - as an integration of all
temperatures between device and refeletor (or sender and receiver).

That would make possible to put the Neo1973 on a table and track
the temperature - in case of changing, it could give an alarm
= very simple fire alarm. Not soooo good, because the smoke/fire gas
COx are very dangerous and they could come into the room without
changing the temperatur sinificant - but just as an idea.

The other idea would be to make noice with the sound of male
mosquito to adduct female mosquitos - I haven't yet a clue
how that would help against them (together with a candel to
burn them *g*).... 

But how to build a room scanner with moving the Neo1973 with your hands?
The vibra could give you a timing how fast you should rotate your hand
from right to left... and the result could be calculated as simple
A combination with an acceleration sensor would give some nice


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