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4hv.org :: Forums :: General Science and Electronics
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opto-isolator for a parallel port

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cavemen
Sun May 16 2010, 06:25PM Print
cavemen Registered Member #2008 Joined: Tue Mar 03 2009, 05:11AM
Location: USA, Frederick, MD
Posts: 118
hello
i am trying to resolve a simple engineering problem of optoisolating my parallel port (17 pins)
and a controll board that would run steper motors

is there an optocoupler chip that has that many channels?

all the chips that i had found are either 4 channel or 1 channel and are all very large in size and i would need a lot

thank you

(i am working on two projects and researching one as i am waiting for parts for another)
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radiotech
Sun May 16 2010, 07:25PM
radiotech Registered Member #2463 Joined: Wed Nov 11 2009, 03:49AM
Location:
Posts: 1546
How many of the 17 pins actually step the motor? Do you need any bidirectional functions on that port?
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cavemen
Sun May 16 2010, 10:13PM
cavemen Registered Member #2008 Joined: Tue Mar 03 2009, 05:11AM
Location: USA, Frederick, MD
Posts: 118
good question
i will research that
thank you
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Bjørn
Sun May 16 2010, 10:37PM
Bjørn Registered Member #27 Joined: Fri Feb 03 2006, 02:20AM
Location: Hyperborea
Posts: 2058
You also need to define what you are trying to protect yourself against, maybe there is a much simpler way around the problem.
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