Subject:
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Computer Serial Port Optoisolator
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Newsgroups:
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lugnet.robotics.handyboard
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Date:
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Thu, 23 Sep 1999 22:18:16 GMT
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Original-From:
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Bill Denzel <wdenzel@polymail.cpunix&stopspammers&.calpoly.edu>
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Viewed:
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771 times
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This is somewhat off subject, but I am looking for a circuit schematic that
will show how to build a serial port optoisolator for my computer. The
problem I am having is that once in a while I wire a circuit wrong and end
up putting 115V onto the ground pin on my serial port. Obviously the
computer does not like this very much and I ended up frying an old
motherboard. Anyway, I wanted to build a small box that contained a circuit
that I could use to completely isolate my circuits from the serial port, yet
still be able to transmit and receive data through the port. If any of you
have seen such a schematic or pre-existing part I would be extremely
grateful. Thanks
Bill Denzel
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