Ok, I figure if I can post one article...I can post another!
Here's a circuit that basically does what an optoisolator does, except the diode and phototransistor are not in the same package.
With the use of some "super bright LEDs" you can have a visible rs232 link that also provides a neat light show!
They say keep the LEDs and phototrans 50cm away for maximum isolation...not sure if it would work further away in a darker room.
Here's the circuit link:
Here's the article:
Just a note to other users posting links....it's nice to use the link button at the top of the 'new post' window as this allows people to just click on the link rather than retype/copypast in to their browser!
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