Re: LASERS! && Freemont Street LED array (was Re: Cray J932SE (was Re: Straight 8 up on Ebay just now))

No, Brad was not the founder of NewTek. He did do early designs of the Toaster. - John Derp! Checked, he built the first Video Toaster but not the company. https://en.wikipedia.org/wiki/Brad_Carvey Thanks for the correction! -- Ethan O'Toole

Re: LASERS! && Freemont Street LED array (was Re: Cray J932SE (was Re: Straight 8 up on Ebay just now))

At 05:13 PM 7/19/2016, et...@757.org wrote: >I'm sure you know the thing about Garth/Dana Carvey? Him mentioning the Unix >book in Waynes World was a nod to his brother, his brother founded NewTek the >company behind the Amiga video toaster and the current NewTek Tricaster stuff? No, Brad was

Re: LASERS! && Freemont Street LED array (was Re: Cray J932SE (was Re: Straight 8 up on Ebay just now))

The only ones worth using that I'm aware of are Scream Tracker and Impulse Tracker and neither was around in the 16 bit ISA days pre-386, IIRC. I doubt Scream Tracker would be able to function on a 286 anyhow. It puts a 486DX2/66 at about 50% CPU load, from my recollection. The Amiga trackers

Re: LASERS! && Freemont Street LED array (was Re: Cray J932SE (was Re: Straight 8 up on Ebay just now))

On Wed, 20 Jul 2016, et...@757.org wrote: > Very cool! I'm a.d.d. a bit with hobbies. On the synth side I recently > picked up a Roland MT-32, so that was an achievement unlocked. Hope to > find an Oberheim Matrix 6 at some point. I'm not a keyboard guru like some on the list, but I've owned a

Re: LASERS! && Freemont Street LED array (was Re: Cray J932SE (was Re: Straight 8 up on Ebay just now))

I knew it! Piano, bass, violin, and guitar, here. I play them all badly but guitar a little less badly. I've been an amateur for about 10 years and I've been taking guitar lessons for about three years, now. Sax, eh? Cool. I've never tried a reed-based instrument. Very cool! I'm a.d.d. a bit

RE: LASERS! && Freemont Street LED array (was Re: Cray J932SE (was Re: Straight 8 up on Ebay just now))

On Tue, 19 Jul 2016, Mark Green wrote: > I don't know a lot about data transmission, my main application is > display. Thanks anyway for the informed reply. Do you happen to know the best place to view large format holograms? I'm just looking for your personal opinion, since you seem to be in

Re: LASERS! && Freemont Street LED array (was Re: Cray J932SE (was Re: Straight 8 up on Ebay just now))

I wouldn't be doing that. I cited the cg6 by way of contrast. How the points get into the display hardware is still open, but a framebuffer seems unlikely to be involved. (I suppose a framebuffer with something like DVI-D could be used as a way to continuously replay sequences very fast, but

Re: LASERS! && Freemont Street LED array (was Re: Cray J932SE (was Re: Straight 8 up on Ebay just now))

On Tue, 19 Jul 2016, et...@757.org wrote: > I live in Virginia but go to a number of events every year. I dabble > with music a little, have some synths and midi hardware (and of course > an Atari ST setup, and a luggable Pentium 200 with a SB/GUS and Voyetra > Sequencer!) Also dabble a little

Re: LASERS! && Freemont Street LED array (was Re: Cray J932SE (was Re: Straight 8 up on Ebay just now))

> On Jul 20, 2016, at 9:12 AM, Mouse wrote: > >> As far as sending video from a computer frame buffer, I think it >> might be way too fast. > > I wouldn't be doing that. I cited the cg6 by way of contrast. How the > points get into the display hardware is still

Re: LASERS! && Freemont Street LED array (was Re: Cray J932SE (was Re: Straight 8 up on Ebay just now))

> As far as sending video from a computer frame buffer, I think it > might be way too fast. I wouldn't be doing that. I cited the cg6 by way of contrast. How the points get into the display hardware is still open, but a framebuffer seems unlikely to be involved. (I suppose a framebuffer with

Re: LASERS! && Freemont Street LED array (was Re: Cray J932SE (was Re: Straight 8 up on Ebay just now))

> On Jul 19, 2016, at 4:58 PM, Wayne Sudol wrote: > > Laser technology to draw things like this is used in photo typesetters. A > laser beam is focused onto a thin (about 1/2" thick) many sided (about 8 > sides i think) spinning mirror. Each facet of the mirror is cut

Re: LASERS! && Freemont Street LED array (was Re: Cray J932SE (was Re: Straight 8 up on Ebay just now))

Laser technology to draw things like this is used in photo typesetters. A laser beam is focused onto a thin (about 1/2" thick) many sided (about 8 sides i think) spinning mirror. Each facet of the mirror is cut differently to deflict the beam up, down or center it on a sheet of moving paper or a

RE: LASERS! && Freemont Street LED array (was Re: Cray J932SE (was Re: Straight 8 up on Ebay just now))

I don't know a lot about data transmission, my main application is display. The mathematics behind data transmission and display are similar, they are based on wave propagation and diffraction and lots of Fourier transforms. The laser power is not overly important, it's the resolution of

Re: LASERS! && Freemont Street LED array (was Re: Cray J932SE (was Re: Straight 8 up on Ebay just now))

> From: Mouse > my impression is that they're only for pre-prepared displays, and only > some displays (notably those that don't involve the beam turning any > sharp corners My vague recollection is that they could do pretty sharp corners, but it's been decades. IIRC, they were

Re: LASERS! && Freemont Street LED array (was Re: Cray J932SE (was Re: Straight 8 up on Ebay just now))

On 19/07/2016 21:46, Mouse wrote: You'd probably know, then - what's the fastest way to deflect a laser beam? In particular, I'm wondering how practical it might be to take a laser and turn it into a vector display Turning sharp corners is the hard part with mechanical deflectors like

Re: LASERS! && Freemont Street LED array (was Re: Cray J932SE (was Re: Straight 8 up on Ebay just now))

Killer. I wish we were neighbors, Ethan. We'd be able to throw the most awesome block parties, I swear. I bet you are a musician, too. I live in Virginia but go to a number of events every year. I dabble with music a little, have some synths and midi hardware (and of course an Atari ST setup,

Re: LASERS! && Freemont Street LED array (was Re: Cray J932SE (was Re: Straight 8 up on Ebay just now))

Yeah, me too, but my impression is that they're only for pre-prepared displays, and only some displays (notably those that don't involve the beam turning any sharp corners, such as Lissajous figures). My impression may, of course, have been - be - incorrect, which is what I'm asking for; if

RE: LASERS! && Freemont Street LED array (was Re: Cray J932SE (was Re: Straight 8 up on Ebay just now))

On Tue, 19 Jul 2016, Mark Green wrote: > In my day job I work on computational holography and other forms of > esoteric 3D displays, so I can give you some insight in how these things > work. Holography is amazing. Do you know much about so-called "free space optical" data transmission? I

RE: LASERS! && Freemont Street LED array (was Re: Cray J932SE (was Re: Straight 8 up on Ebay just now))

In my day job I work on computational holography and other forms of esoteric 3D displays, so I can give you some insight in how these things work. Remember these are vector displays and not raster displays, so the computational side is not an issue. You are basically looking at a pair of D/A

Re: LASERS! && Freemont Street LED array (was Re: Cray J932SE (was Re: Straight 8 up on Ebay just now))

On 7/19/2016 1:22 PM, Noel Chiappa wrote: Those have been around for decades - I recall seeing them used to draw things on the sides of building,_many_ moons ago. I know that the pen motors from Brush recorders were used eons ago. They have frequency response that is very high, and if you

Re: LASERS! && Freemont Street LED array (was Re: Cray J932SE (was Re: Straight 8 up on Ebay just now))

>> I'm wondering how practical it might be to take a laser and turn it >> into a vector display on a handy blank wall > Those have been around for decades - I recall seeing them used to > draw things on the sides of building, _many_ moons ago. Yeah, me too, but my impression is that they're only

Re: LASERS! && Freemont Street LED array (was Re: Cray J932SE (was Re: Straight 8 up on Ebay just now))

> From: Mouse > I'm wondering how practical it might be to take a laser and turn it > into a vector display on a handy blank wall Those have been around for decades - I recall seeing them used to draw things on the sides of building, _many_ moons ago. I'm assuming they bounce the

Re: LASERS! && Freemont Street LED array (was Re: Cray J932SE (was Re: Straight 8 up on Ebay just now))

> On Jul 19, 2016, at 4:02 PM, Mouse wrote: > >>> Light show hobby. > > You'd probably know, then - what's the fastest way to deflect a laser > beam? In particular, I'm wondering how practical it might be to take a > laser and turn it into a vector display on a

Re: LASERS! && Freemont Street LED array (was Re: Cray J932SE (was Re: Straight 8 up on Ebay just now))

On Tue, 19 Jul 2016, Mouse wrote: > You'd probably know, then - what's the fastest way to deflect a laser > beam? Whoa. Interesting problem since a photon carries no charge and thus you can't horizontally or vertically deflect it with a magnetic field. I guess that's why folks make things like

Re: LASERS! && Freemont Street LED array (was Re: Cray J932SE (was Re: Straight 8 up on Ebay just now))

They generaly use mirrors - I would cobble something together by taking the laser diode read head from a CD rom, and removing the diode assembly, and glue a small, thin, front surface mirror in its place, and drive the coil from the output of an audio amp, just to try it out. A pair of these,

Re: LASERS! && Freemont Street LED array (was Re: Cray J932SE (was Re: Straight 8 up on Ebay just now))

>> Light show hobby. You'd probably know, then - what's the fastest way to deflect a laser beam? In particular, I'm wondering how practical it might be to take a laser and turn it into a vector display on a handy blank wall - but that requires some very fast acceleration of the spot, probably

LASERS! && Freemont Street LED array (was Re: Cray J932SE (was Re: Straight 8 up on Ebay just now))

On Tue, 19 Jul 2016, et...@757.org wrote: > Light show hobby. Inspired by the Def Leppard music video "Pour some > sugar on me." Killer. I wish we were neighbors, Ethan. We'd be able to throw the most awesome block parties, I swear. I bet you are a musician, too. > Everything is from China and