[sdiy] Laser Harp in action

[Jay Vaughan]

>Andrew's harp is the earlier top sensor design. I believe this is the
>sort of harp that was used on the JMJ China Concerts video. Its easier
>to do than with back scattering, but does rely on careful placement of
>the beams to ensure beam breaks. Its surely the best way for smaller
>systems.
>

Doesn't back scattering also allow you to do 'height' breaks as well, 
where breaks at different heighs in the beam can provide another 
parameter, such as 'velocity' or 'volume'?  i.e. the height of the 
break lends to an 'intensity' value?

>Martin Frankcom's box is just that. A box. No top sensors. You just have
>the box on the floor and beams go up to the roof (or stars).
>

... with the added benefit that you don't need a super strong laser, 
though, right?

-- 

;

Jay Vaughan