On 11/18/2012 01:28 PM, Tom Metro wrote:
Mark Woodward wrote:
Tell us what you choose, and how it works for you in your application.
I wanted to prototype this using my desktop machine, rather than the
target server, and it doesn't have a parallel port.
I've been following this thread for a while and I'm confused.....
I originally thought you wanted to drive a relay from a parallel port...
Correct. That's still the plan.
So, did you see the schematic I posted? It is a standard TTL interfacing
circuit. 2 resistors, a diode, a 2n2222 and a relay. Excluding the relay
and connector, its probably 50c worth of stuff and you can build it onto
the connector.
and I'm reading that you have a USB parallel printer interface, which
you have seen is not the same thing. Let's put the engineering caps on!
It was a lengthly post, so you may have missed it, but I explained that
the only reason why I was exploring the USB option was for the
convenience of prototyping the interface using my desktop, rather than
the MythTV server located in my basement. (See quote above.)
I also noted that I anticipated issues with a USB parallel adapter.
Still, I was curious to find out what those issues would be. Now I know.
And so I shared that.
-Tom
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