Subject: Re: IDE LED always on
To: Chuck Yerkes <>
From: David Laight <>
List: netbsd-users
Date: 05/20/2003 08:58:49
On Tue, May 20, 2003 at 01:40:16AM -0400, Chuck Yerkes wrote:
> 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.

My quick perusal of Farnel's web site showed that you can buy
optoisolating triac drivers that have built-in zero crossing detection.

Since the triac drivers are rated at 100ma, they might actually be
able to drive a 'wall wart' PSU directly...


David Laight: