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Re: [PSUBS-MAILIST] PWM Controllers
First, some relays "hold" themselves open and/or closed when
activated or deactivated. Others require a constant current to
keep them in the closed or open positions. The "hold" type are
called latching. One of the best sources for small quantity
electronics of all sorts is www.jameco.com Good luck.
Warren.
>
> On Monday, Jan 20, 2003, at 21:29 US/Central, Warrend Greenway wrote:
>
> > An SCR is similar to a latching relay, and a FET is similar to a
> > non-latching
> > relay. FETs only work full-on and full-off. They destroy themselves if
> > you
> > use them in an "analog" manner.
>
> Okay -- so tell me what a latching relay is, and I'll be all set.
>
> Pardon me if I missed messages in this thread where this was already
> discussed, but didn't John Farrington and Monica build their own PWM
> controller? Oh yes, I have it bookmarked here:
> http://www.prismnet.com/~jrf/SubPics/page017.html.
>
> (By the way, and completely OT, can somebody suggest a likely place to
> look for basic electronic components -- preferably someplace that would
> have parts lists or circuit diagrams for lots of consumer electronic
> gizmos? I need to replace a component in a JVC stereo, and it's too
> damaged to read what it was so I need to go by the number printed on
> the PCB.)
>
>
> David
> buchner@wcta.net
>
--
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