(Circuit details: http://www.epanorama.net/circuits/parallel_output.html)
I also combined it with laser gesture recognition to turn four appliances on or off using a laser pointer for Engineer 2007. I guess everyone loved it. :)
If you can make pcbs, and are interested in a simple little circuit to provide opto-isolator protection to 4 parallel port inputs, and relays on the other 4 bits, as outputs, then check the offer on....
... which is a little way down the page, next to the Google panel, in the paragraph starting "I have a third generatino, inexpensive...".
keep posting more and more content
Absolutely looking forward to seeing what you have planned after that. Any news on what you're functioning on?
3very informatic post on mobile relays
love your search.
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