Re: AC Proximity Detector
- From: ehsjr <ehsjr@xxxxxxxxxxxxxxxx>
- Date: Fri, 07 Sep 2007 16:24:02 GMT
Rich Grise wrote:
On Wed, 05 Sep 2007 11:43:39 -0400, Spehro Pefhany wrote:
On Wed, 05 Sep 2007 07:46:19 -0700, Richard Henry
On Sep 4, 9:34 am, Don Lancaster <d...@xxxxxxxxxx> wrote:
monolo...@xxxxxxxxx wrote:
Out of curiosity - how do those hand held AC proximity sensors work ?
(e.g. the pen sized devices that you hold near to a live mains wire
which light up when AC is present). Is there an off the shelf IC that
you can purchase to make one yourself ? Anyone have a circuit diagram
for one ?
Reason for asking, I want to build an electronic circuit to detect the
presence of 240v in a wire - without disturbing the wire.
http://www.tinaja.com/glib/muse89.pdf, of course.
Your battery symbol is upside-down.
Yeah, I've always thought that it should be the opposite, since the
can on carbon-zinc batteries is the (-), but that's the standard..
So, then, Don's symbol is "right" in that the thick black one, the
carbon, is plus, and the thin line, the zinc envelope, is minus.
That's the way I've _always_ done it, and I don't care if everybody
else in the world does it wrong. ;-)
Cheers!
Rich
:-)
As long as you label the side _you_ designate as +
it won't be misunderstood, even if you do it *right*.
:-)
Ed
.
- References:
- AC Proximity Detector
- From: monolog99
- Re: AC Proximity Detector
- From: Don Lancaster
- Re: AC Proximity Detector
- From: Richard Henry
- Re: AC Proximity Detector
- From: Spehro Pefhany
- Re: AC Proximity Detector
- From: Rich Grise
- AC Proximity Detector
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