Re: TI-H: Re: Laser Network (OT)
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Re: TI-H: Re: Laser Network (OT)
i suppose it would be like an ir serial port, but it could probably go for
longer ranges, as for the uses, you could use it for city skyscraper
communication, just outside a window, and it couldn't be interuppted by other
communications, such as is the case with microwave transmitters... i saw a news
article here mentioning something similar but for satellites, as competing
businesses in neighboring buildings destroying the other buildings microwave
transmitter by sending a strong signal when the other is trying to recieve data
from a satellite... on the subject of satelites, i wonder how much bandwidth the
iridium system could support... its unfortunate that they plan to dump the
lot... i saw a site called www.saveiridium.com at least someone is trying to
save the satelites, they make interesting flares at night if you look at the
right time... anyway, using cables to communicate between buildings would
require many cables... all underground. Why not a set of laser transmitters on
the roof or on certain window ledges...
Nick wrote:
> it'd be kinda amusing, yeah, and it would work if you had the inclination.
>
> it would work like the IR serial ports most laptops already have; but if you
> can already -see- the other computer, then the cable you string out between
> them ought to be secure already, no? ;)
>
> y'know what would be really really cool, is changing the IR port on a laptop
> to work with a laser; it would be VERY simple to do, and highly amusing.
> change the LED in there to a laser diode, use a transistor to switch the
> larger current the LED demands, and pow.
>
> a laser Ethernet would probably be a mite slower than fiber, and if you ran
> a hub then all the computers would have to be able to -see- the hub, which
> could get interesting.
>
> and if i wanted to make it insecure, i'd pass a semisilvered mirror in the
> way of the beam, or semisilver one of the existing mirrors with a bias on
> the forward signal.
>
> or i could just tap the transciever at the hub.
>
> it'd still be wicked cool, though, i agree ;)
>
> ohohohoh hey, lookie what i found -- go to www.conversant.com & click on the
> banner thing for PAV Data Systems.
> now THAT's amusing.
>
> and they're right here in boston, too! neat-o.
>
> --nick
>
> Nick Foster / Bistromath / zaphod@coe.neu.edu
> KeyID 2048/1024 0x663CB446
> 6CAF FFD4 F9BA 64BA ECF9 032E 7402 3886 663C B446
>
> ----- Original Message -----
> From: "Giles Pollock" <glp71s@mailandnews.com>
> To: <ti-hardware@lists.ticalc.org>
> Sent: Monday, March 27, 2000 6:14 AM
> Subject: TI-H: Laser Network (OT)
>
> >
> > I had an idea earlier today, to make a secure and wireless network...
> > You could use a 10BaseF tranciever (the ones that have two fiber
> > connections, i take it that one is transmit and one recieve) and replace
> > the transmitter with a laser diode (maybe extra circuitry) and use a
> > different reciever. With a few mirrors you could focus the laser beam
> > into a reciever (say a photodiode...) and it wouldnt require much to
> > make an aiming device, if the entire arrangement was bolted to something
> > secure, say a window sill or something. I have a rough idea on how you
> > could make an automatic aiming device using another mirror and another
> > laser with a few photodiodes and small servos. The laser would be
> > completely secure, it would be almost impossible to infiltrate the beam.
> > The only disadvantage would be that it would be rather expensive...
> > anyone got any other ideas?
> >
> >
> >
> >
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