[Ronja] Further lcd thoughs...

[Thomas Egenhofer]

if you want to imporve speed without breaking range or ending up with an
expensive and impossible to use system. you have basically 3 choices:
1st. increase switching speeds of your transmitter/receiver. which is
most likely only possible with laser-diodes without further trouble.
-would require quite some changes to the existing hardware.

2nd. you you several different colors to transmit several bits paralell.
-requires advanced optical system which i would prefer not to use.

3rd. and probably the most reasonable choice. use several light-levels
for encoding the signal. 3-level encoding like the standart 100mbit
network does sounds possible to me. requires a completely new
transmitter and receiver. but has potential to make even autoneg working
to some extend (since the idle signal would be missing on 10mbit
connections its not fully operational, but 100mbit link should be ok
just like that).

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> 
> In reply to self :
> 
> Most webcams are at best 640x480 at 30fps.
> And as we would running monochrome (sans ir filter) there is simply not 
> enough bandwidth to make it sensible.
webcams or cemras in general. even if you manage to project your image
over several hundret meter (try with a beamer if you have one) , allign
it would be very difficult, even if you use 3x3 or 4x4 pixels for each
bit. syncronising the refresh rates of both would be another issue.
guess the resulting link would be extremly unstable.using a tv-remote is
easyer, and in the end you might get more data transmitted with it.