>> It depends on how many items you want to control? If you only wanted to >> control 1 simple on/off item like a lamp then some simple latch circuit >> connected to the serial port could probably be made, of course you will >> need some good isolation between your mac circuit and the AC side of >> things, if you don't know what you are doing there it is best left alone. > >Yes, I only have in mind a simple on/off circuit, to control a relay >that is isolated from the AC side. I'll have to do a little >experimenting to see if the serial port can supply a simple on/off >circuit.
My guess, and I haven't tried any if this on a Mac, would be to look at the handshake lines using a scope, and then try opening and closing the port in code on the Mac, this is what I have done on RS-232 before, and I would expect a similar operation on the Mac. For the AC side, I used to have a circuit which used an opto-isolator from the nasty triac AC side of things, just to keep your Mac safe ;-) >Andrew Regards Sean. -- Compact Macs is sponsored by <http://lowendmac.com/>. Support Low End Mac <http://lowendmac.com/lists/support.html> Compact Macs list info: <http://lowendmac.com/lists/compact.shtml> --> AOL users, remove "mailto:"; Send list messages to: <mailto:[EMAIL PROTECTED]> To unsubscribe, email: <mailto:[EMAIL PROTECTED]> For digest mode, email: <mailto:[EMAIL PROTECTED]> Subscription questions: <mailto:[EMAIL PROTECTED]> Archive:<http://www.mail-archive.com/compact.macs%40mail.maclaunch.com/> --------------------------------------------------------------- >The Think Different Store http://www.ThinkDifferentStore.com ---------------------------------------------------------------
