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Parallel Port Relay Control Circuit
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Re: Parallel Port Relay Control Circuit
by Tomi Engdahl on Thu Dec 03, 2009 12:16 pm
The computer side of the optoisolator is powered form data line coming to circuit and the output side is powered from the external 12V power supply that powers the relay.
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16 posts • Page 2 of 2 • 1, 2
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