On Sun, 28 Dec 1997 22:09:03 +0100, you wrote:

> I know this is kinda off topic, but since this is the only
>hardware/software/everything list that i know of, i'll post it here....
>
> A couple of years ago, i saw a demonstration of a DSP from Analog Devices,
>wich displayed a rotating logo on a oscilloscope in X/Y mode. I have lately
>been thinking about doing the same thing, but with a laser instead... It
>could be fun to make a rotating (digitaly) clock display (like the opengl
>screensavers that come with WinNT 4.0), that was blown up on the wall...
>
> I was planning on using some galvanometers (if i can find some cheap)
>(Someone here mentioned that there was some in a videodisc player???) And a
>laser diode, for the light thing..
> So my questions is:
>
> 1. Anyone got any experience with such an implementation?
> 2. Where do one get hold of galvanometers?
> 3. How fast can one turn a laser led on/off?
> 4. See number 1. :)
>
>I know that it must be some kind of vectorised graphics engine in a DSP (i
>don't think a PIC is fast enough for this one). But besides this i haven't
>got any clues as to how i should attack this little challenge...
>
>- Thomas
If you can find an OLD Philips top-loading laservision player, these
have a HeNe laser and a nice pair of voice-coil controlled mirrors.
These players can sometimes be found at hamfests etc. very cheap.
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