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RE: Re: SOM1 relay board switching sound.
- To: <ukha_d@xxxxxxx>
- Subject: RE: Re: SOM1 relay board switching sound.
- From: "Amar Nagi" <groups@xxxxxxx>
- Date: Fri, 23 Aug 2002 15:16:26 +0100
- Mailing-list: list ukha_d@xxxxxxx; contact
ukha_d-owner@xxxxxxx
- Reply-to: ukha_d@xxxxxxx
I would love to be a beta tester,
I have homeseer and volunteer to write a plugin if you like
-----Original Message-----
From: ian.bird@xxxxxxx
[mailto:ian.bird@xxxxxxx]
Sent: Fri 23/08/2002 14:45
To: ukha_d@xxxxxxx
Cc:
Subject: RE: [ukha_d] Re: SOM1 relay board
switching sound.
Hi Amar
I have ordered the PCB's so assuming no
mistakes on my part boards will be available from about the 9th September.
I am away on hols for a little before that ;-))
Details and pictures are on my site at
www.mollyology.com then projects and relay board. At the moment it is aimed
at HV and Comfort users but I will be putting together a small simple
serial interface for it. This latter bit will make it very similar to the
unit you have. You can be my beta tester if you like ;-))
The relay board is opto isolated as well so
none of that nasty AC stuff going anywhere near your precious PC.
Ian
Ciba Vision (UK) Ltd
Tel:+44(0)1489 775570
Fax:+44(0)1489 779570
E mail: ian.bird@xxxxxxx
-----Original
Message-----
From: Amar
Nagi [mailto:groups@xxxxxxx]
Sent: 23
August 2002 14:33
To:
ukha_d@xxxxxxx
Subject: RE:
[ukha_d] Re: SOM1 relay board switching sound.
ian can i
have details of your board please
-----Original Message-----
From: ian.bird@xxxxxxx
[mailto:ian.bird@xxxxxxx]
Sent: Fri 23/08/2002 13:31
To: ukha_d@xxxxxxx
Cc:
Subject: RE: [ukha_d] Re: SOM1 relay board
switching sound.
When I was designing my relay board I
initially used reed relays which had some problems with things like
capacitive loads, AC etc. The relays on the SOM1 look very similar so you
may be experiencing similar problems. Check the relays are actually
switching off somehow with the speakers connected and showing the problems.
Alternatively use one of my boards <grin> which are rated up to 120v
AC and everything else you can think of.
Ian
Ciba Vision (UK) Ltd
Tel:+44(0)1489 775570
Fax:+44(0)1489 779570
E mail: ian.bird@xxxxxxx
-----Original
Message-----
From: Amar
Nagi [mailto:groups@xxxxxxx]
Sent: 23
August 2002 13:26
To:
ukha_d@xxxxxxx
Subject: RE:
[ukha_d] Re: SOM1 relay board switching sound.
i switched
both + and -
-----Original Message-----
From: PatrickLidstone
[mailto:patrickl@xxxxxxx]
Sent: Fri 23/08/2002 13:18
To: ukha_d@xxxxxxx
Cc:
Subject: [ukha_d] Re: SOM1 relay board
switching sound.
Loudspeakers use an AC signal, not DC. There
is no concept of a
common ground, so you can't switch it that
way.
Patrick
--- In ukha_d@y..., "Amar Nagi"
<groups@a...> wrote:
> i think you need to switch the live
>
>
>
-----Original Message-----
>
From: justin@g... [mailto:justin@g...]
>
Sent: Fri 23/08/2002 13:06
> To:
ukha_d
>
Cc:
>
Subject: [ukha_d] SOM1 relay board switching sound.
>
>
>
> I
recently purchased a SOM1 relay board
> (http://www.phaedrusltd.co.uk/system/index.html)
> I
am running 2 sets of speakers connected to a soundcard over
CAT5 and thought
> I
would try switching using the relay board (that's not why I
bought it though)
>
> The
wiring uses 4 cores, orange = left, green = right, w/o &
w/g = ground*.
>
When I switch the ground it just goes a bit quieter? Any
ideas why this
>
happens? I thought it would just switch the sound off!
>
>
Cheers,
>
Justin.
>
> * I
think it probably isn't a great idea to use 2 cores for
ground & 1 each for
>
left/right, but don't know why! I was thinking about
shielding.
>
>
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