9 Mar
2007
9 Mar
'07
11:56 a.m.
Popular Electronics had a lissajous figure generator project to attach to a
scope in XY mode. Just a couple of slowly frequency and amplitude ramping
sine wave oscillators. I always wanted to drive some XY servo mirrors and
put that on the wall for a laser light show.
My XY mirrors came out of an old Pioneer laser disk player. (HeNe tube
too!) They would swing several degrees, with the mirrors mounted on a voice
coil like yoke over a magnet.
Randy
From: Tom Peters <tpeters at mixcom.com>
Reply-To: "General Discussion: On-Topic and Off-Topic
Posts"<cctalk at classiccmp.org>
To: "General Discussion: On-Topic and Off-Topic Posts"
<cctalk at classiccmp.org>
Subject: Re: raster laser?
Date: Fri, 09 Mar 2007 13:32:13 -0600
At 12:01 PM 3/9/2007 -0500, you wrote:
_________________________________________________________________
Mortgage rates as low as 4.625% - Refinance $150,000 loan for $579 a month.
Intro*Terms
https://www2.nextag.com/goto.jsp?product=100000035&url=%2fst.jsp&tm…
And thusly were the wise words spake by David
Griffith
It was somewhere about 1980 that I built the basic high-power car-audio
speaker laser deflector. Mine used plastic ball-socket pivots and aluminum
stock as levers, to pivot a speaker horizontally. The laser goes from that
mirror to another one driven vertically by a second speaker.
I have a Real Laser (plasma tube NeHe) to drive it. Still works.
Haven't we all built something like that at one time or another?
-----
481. [Humor] Shouldn't the Psychic Friends call you? --heard on the radio
--... ...-- -.. . -. ----. --.- --.- -...
tpeters at nospam.mixcom.com (remove "nospam") N9QQB (amateur radio)
"HEY YOU" (loud shouting) WEB: http://www.mixweb.com/tpeters
43? 7' 17.2" N by 88? 6' 28.9" W, Elevation 815', Grid Square
EN53wc
WAN/LAN/Telcom Analyst, Tech Writer, MCP, CCNA, Registered Linux User
385531
Somehow I got subscribed to an optics catalog. This got me to
thinking.
How hard would it be to cause a laser beam to
sweep with the speed and
accuracy to be a substitute for a CRT? The upshot? Take an old
terminal
with nasty screen burn. Cut off the gun end of
the bottle, clean off
the
old phosphor. Apply new phosphor of some kind,
then mount the laser
rasteriser where the old gun was. Projecting raster images on the side
of
a building would be fun too.
I would rather do vector graphics.. :) I have seen plans on the where
you use the voice coils from two old hard drives with mirrors stuck to
them to bounce the laser onto a wall..