Re: Understanding IR

["Marc Mosthav" <marc@xxxxxxx>]

I have written a MisterHouse module that outputs X10 RF in IR via the
RedRat2 device. When you point that at a IR extender transmitting at
433.92
MHz it can be picked up by a TM13U-AH. Works a treat for me and solved
my
two phase issue without a coupler (using two TM13U-AH's).

Marc
----- Original Message -----
From: <ian.bird@xxxxxxx>
To: <ukha_d@xxxxxxx>
Sent: Thursday, October 17, 2002 4:41 PM
Subject: Re: [ukha_d] Understanding IR


>
> Hi John
>
> First off, the port on your laptop will be IRDA not IR. IRDA is a
short
> range, low power high speed thingy. Your remote control is relatively
high
> power long range and slowww. The two on the whole do not mix. For
remote
> controls there are several 'standard' ways of encoding your binary
data
> including RC5, RC6 Sony PWM, Japanese etc. etc. All these though
are
> basically on and off pulses of IR light which can be interpreted by
a
> receiver. I have some references at home but they are just
snippets
really.
>
> X10 - what do you mean by remote devices? X10 works by superimposing
a
> small signal onto the mains at the zero crossing point of the sine
wave.
> This means x10 stuff is connected by the mains and only over a
relatively
> short distance without repeaters. X10 RF stuff is radio technology
to
carry
> the data in a very similar way to IR. The device which plugs in then
turns
> this back into waves on the mains.
>
> If you have a PC application for example this will need an interface
into
> the mains to produce the x10 signal. An x10 light socket or whatever
can
> then pick it up.
>
> HTH
>
> Ian
>
>
>
>
>
>
>                      
John Poltorak
>                      
<jp@xxxxxxx>           
To:
ukha_d@xxxxxxx
>                                               
cc:
>                      
17/10/02 15:43          
Subject:  [ukha_d]
Understanding IR
>                      
Please respond to
>                      
ukha_d
>
>
>
>
>
>
>
> Does anyone know of any good references for understanding IR?
>
> In principle, is there any reason why I shouldn't be able to use the
IR
> port on my laptop as a remote control for the TV or any other device
which
> which be remote controlled?
>
>
> I'm also trying to figure out how X10 is supposed to be used to
connect
> to remote devices... Do I need some sort of converter to be able to
do
> this? As I understand it X10 only works across devices connected by
the
> mains.
>
>
> --
> John
>
>
>
>
>
> http://www.automatedhome.co.uk
> Post message: ukha_d@xxxxxxx
> Subscribe:  ukha_d-subscribe@xxxxxxx
> Unsubscribe:  ukha_d-unsubscribe@xxxxxxx
> List owner:  ukha_d-owner@xxxxxxx
>
> List of UKHA Groups here - http://groups.yahoo.com/group/UKHA_Grouplists/
>
> Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
>
>
>
>
>
>
>
> http://www.automatedhome.co.uk
> Post message: ukha_d@xxxxxxx
> Subscribe:  ukha_d-subscribe@xxxxxxx
> Unsubscribe:  ukha_d-unsubscribe@xxxxxxx
> List owner:  ukha_d-owner@xxxxxxx
>
> List of UKHA Groups here - http://groups.yahoo.com/group/UKHA_Grouplists/
>
> Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
>
>
>
>

Yahoo! Groups Sponsor

ADVERTISEMENT

http://www.automatedhome.co.uk
Post message: ukha_d@xxxxxxx 
Subscribe:  ukha_d-subscribe@xxxxxxx 
Unsubscribe:  ukha_d-unsubscribe@xxxxxxx 
List owner:  ukha_d-owner@xxxxxxx
List of UKHA Groups here - http://groups.yahoo.com/group/UKHA_Grouplists/

Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service.