Re: Device ON reporting - current sensors...

["Frank Mc Alinden" <frankmc@xxxxxxxxxxxxxxxx>]

Hi Kevin

>There is an LED if there was a light based sensor
> but haven't come across one.

I  make up my own led sensors for some of my kit........
http://www.armaghelectrical.com.au/page9.html

My  led probe pcbs use open collector output  and can be connected directly
to Homevision  Port B inputs...... It uses an LDR connected to a 741 op
amp.....The LDR is hot glued into a clipsal plastic cap.....

HTH
Frank

----- Original Message -----
From: "Kevin Hawkins" <yahoogroupskh@xxxxxxx>
To: <ukha_d@xxxxxxx>
Sent: Tuesday, May 13, 2008 6:54 PM
Subject: [ukha_d] Device ON reporting - current sensors...


> I'm after a tidy way of detecting when a device is switched on.
> Preferably something that sits in the mains lead feed and senses
current
> levels.  It should cope with a standby current and a full on so
ideally
> should be intelligent or have a threshold current selectable. I would
> like volt free contact reporting. What's available ? There used to be
a
> few of these -  the enthusiast versions involving a few turns of the
> live or neutral wire around a toroid (a bit untidy)  but I can't seem
to
> find many now - or not at an economical price.
>
> Having just been given one of the Intelliplugs (thans e-on) I was
toying
> with using those - it has switched socket outputs that could be used
to
> power a relay, does intelligent sensing and can be sourced for around
a
> fiver. There is a 5 second delay for both on and off sensing though
and
> the devices are slightly bulky being the size of a 3 way adaptor..
> Something small and inline to the power cable (IEC connectors) would
be
> great.
>
> On the devices I wish to monitor I dont't have any outputs that easily
> reflect state eg a  voltage or video synch signal that could be used
to
> trigger something.  There is an LED if there was a light based sensor
> but haven't come across one.
>
> Any ideas - what do you professional installers use nowadays ?
(although
> no doubt its at a professional price too)
>
>   K
>
> ------------------------------------
>
> **** Sponsored By http://www.Berble.com ****
> ****       Computers You Carry          ****
>
>
>
>
>


------------------------------------