From: Andreas Robinson (sleeper75se_at_yahoo.se)
Date: 2001-11-26 23:16:38
Hi all,
I've been lurking on this list for quite a while, and
so far I have not had much to contribute, until now.
I think you can make a good compromise between a
simple optocoupler and IrDA. How about using Toslink?
It is commonly used for optical transmission of audio,
but you can transmit any data you want.
Take a look at the schematic (pdf file) and tell me
what you think. The other file is a schematic for a
spice simulator called Simetrix. A very useful demo
(limited but free) It's available at
www.newburytech.co.uk
On one end I use a regular toslink transmitter ($5)
and on the other a cheap transistor circuit powered by
the serial port. The regular toslink receiver is too
power hungry to be powered this way. So far, I've only
tested with a fairly short optical cable, about 1
meter (3 feet) but it should work with much longer
cables, perhaps 5-10 meters.
Be well,
Andreas
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