Re: laser projector...

On Tue, 13 Jan 1998 11:08:00 -0800, Clay Cowgill <clayc@diamondmm.com> wrote:

>Just an "oh-by-the-way"...
>
>I was organizing some Circuit Cellar Ink magazines the other day and
>noticed a write-up on a home-brew laser projector system. (the 12-bit DAC
>outputs caught my eye...) Anyway, it's nothing shockingly new-- just a
>couple of galvo's driven as XY deflection from a PC-- but has the usual
>good-quality Circuit Cellar technical backgrounder with it.
>
>(Including some interesting filter and spectral content stuff...
>Specifically they suggested using an FFT to analyze vector drawings to be
>displayed and have the PC rework the input vectors slightly to reduce
>bandwidth requirements of the output. That's a big deal for the galvos,
>but it probably wouldn't hurt a vector monitor either...)
>
>Anyway, the design as presented was good for about 30k vectors per second--
>I don't know what they used as a definition for a "vector" though. Even if
>it's "full deflection" that still only about 500 vectors at 60hz refresh...
>I dunno.

Hey, you only need about 400 small vectors (max for Sundance, typically only
around 200) at 38hz for Cinematronics games!

(You build the contraption, I'll write the driver!)

-Zonn

<><><><><><><><><><><><><><><><><><><><><><><><><><><><

 ------ ___ Member of A.A.C.S.:
 |---- | ( ) Association for Artistically
    / / ( () ) Challenged Signatures
   / / //\\ // (__)
  / ---/ // \\ //\\ // zonn @ zonn . com
 -------| // \\/
Received on Tue Jan 13 13:25:16 1998