Subject: Re: IDE LED always on
To: None <email@example.com>
From: Chuck Yerkes <firstname.lastname@example.org>
Date: 05/20/2003 01:40:16
Motorola MOC3010 takes DTR on one side. Optoisolator.
On the other end, it controls a triac thats rated at least
400V. Or it drives a transistor that works a relay.
I prefer triacs where the heatsink isn't electrically hot.
In a box, you care less.
I've used parallel ports to run lights and do dimming (needs
something to trip an input on zero crossing). Worked well
enough on a 1MHz Apple ][, I'd presume that a 2000MHz PC
could do ok as well.
Now? I got a weeder tech (weedtech.com) DI/O module that
can control 16 relays. (It doesn't, it just COULD).
Quoting David Laight (email@example.com):
> > Speaking of DSL modems, I wish I had a little electronic switch that
> > I could open/close by controlling the DTR serial pin, say. My modem often
> > loses synch (my ISP says that all DSL modems do this) and can't resynch
> > on its own, about once every week or three. The only way to get it back
> > to life is to cycle the modem's power (!@#$ brain-damage inspired by
> > MS, no doubt). For a non-hardwawre type, is there an inexpensive part
> > or switch that will let me do this? The best any electronics places could
> > suggest was an X10 module which is overkill and way too much trouble, as
> > well as probably being 10 to 100 times more expensive than what I think I
> > really need...)
> All you need is a TRIAC in the AC supply - which will switch mains
> from a few volts either side of ground. You really need an opto-isolater
> though, to allow for the difference between mains neutral and 'earth'
> (or to allow for 'high-side' switching').
> The required parts might even fit inside a UK mains plug!