Re: OT -> bit twiddling on a parallel port?

On Tue, 19 Jul 2005, Mac Mason wrote:

> So, I got an interesting question the other day. I know a guy who wants to
> programatically set the voltages on individual pins on a parallel port. (IE,
> have a command for "set pin 5 to 2 volts" or "set pin 7 to 1 volt".
> He wants to do this in windows, but I'm having no luck figuring this out on
> any platform...

No such luck directly with the port. Standard TTL sets a pin low (0 - 0.8VDC)
or high (2.4 - 5VDC), but no control over the actual voltage leve.

        --Arthur Corliss
          Bolverk's Lair -- http://arthur.corlissfamily.org/
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Received on Tue Jul 19 23:05:40 2005