It is possible, but you need something in between the relay and the serial port. The system I use has a box that connects to the computer and to the various inputs. The ROM in that handles the communications including the various commands that can be sent from the computer. This box then talks to an output box that actually contains the relays for switching pumps, valves etc.
Sorry I can't be more helpful, but I don't know the details - I just plug everything in and hope it works :-) Cheers, Sarah > Hello List: > > I caught Sarah's post regarding old Hypercard serial externals and was > hoping I could solicit an explanation or opinion... > > I'm wondering if the port commands in MC/REV are what can be used to control > hardware -- specifically, to open and close a relay which controls other > gear. If anyone has built anything like this, perhaps they wouldn't mind > passing along some of the details of how this would be constructed. > > Thanks & Regards, > > Scott > > _____________________________________________________________________ > Scott Rossi Tactile Media - Multimedia & Design > Creative Director Email: [EMAIL PROTECTED] > Web: www.tactilemedia.com >
