Re: Low Voltage Cutoff Circuit

From: Me (me_at_me.me)
Date: 08/27/04 

Date: Fri, 27 Aug 2004 16:17:59 GMT

"Fred Bloggs" <nospam@nospam.com> wrote in message
news:412E9C78.4010403@nospam.com...
>
>
> John Fields wrote:
> > On Thu, 26 Aug 2004 04:29:41 GMT, "Me" <me@me.me> wrote:
> >
> >
> >
> >>Thanks for the replies.
> >>
> >>Here's what I was thinking. An SCR connected in series with the Ballast.
> >
> >
> > ...
> >
> > ---
> > Sounds like a good idea. Just for grins, how much current does your
> > ballast draw when it's running? Does it draw any current when its
> > internal low-voltage cutoff is active?
> >
>
> good question- assuming that ballast cut-off current does fall below the
> SCR holding current, the simplest ckt would use a momentary ON-OFF-ON
> rocker switch- these are available in surplus:
>
> View in a fixed-width font such as Courier.
>
>
>
>
> rocker sw
> +--------+
> | o--|-------------+
> | | |
> +-|-o---> | |
> | | | |
> | | o | |
> | | | | |
> | +--------+ |
> | | SCR |
> | | |
> Vbatt>---+-------------------|>|--+-> Load
> | /
> | 100 |
> +---/\/\----+
>

The problem is, I have to use an existing switch, Momentary with lock on.