Thanks for that suggestion, Mike. That looks like a good solution. Oddly, I had saved that data sheet back on may 7, 2009 - probably for similar reasons.
I still need to follow Bob's advice and verify the TTL measurement capability of my circuit. I don't have a signal generator, so I intend on driving it with another arduino and the tone library. Just haven't found the time, and I needed to take a break from it for a while.
Last edited by glug; 04-28-2011 at 11:19 AM..
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