Re: Serial Port control

[martin]

Yes you can get any serial port to go High or Low ( +5V or 0V ) and 
use very simple TTL interface circuitry to close a relay, if all you 
want to control is ONE item.  For more elaborate schemes, such as 
using a Classic to schedule home lights on and off etc, look into the 
XTension option.

Haven't checked, but Radio Shack may still be selling X10 modules. In 
any case, you can Google Xtension, and ActiveHome Communications, 
MouseHouse, and X-10 (with the hyphen); you'll have a ton of info to 
sort through.

Always nice if you can save another classic mac from the landfill by 
giving it a new sense of worth :)

m

 > 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.
Andrew
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