AVR-Chat

On Thursday 11 March 2004 10:09, Ken Holt wrote:

> At 09:21 AM 3/11/2004 +0800, you wrote:
> >I've thought of using a soap bubble instead; triggering when the
> >refraction through or reflection from the bubble changes.
> >
> >Make sure that the air isn't moving too much around the test
> >cell to avoid false triggers.

> Since every wacky idea is being offered:

wacky idea? It's called "ideation".

> Use an accelerometer in the cannon itself to measure recoil
> momentum.  If the mass of the projectile is known, then the
> exiting velocity is also known.

Not quite.

-- 
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