Re: Idea for IR zoning with HV

["andy_powell_is" <ukha@xxxxxxx>]

I really really wish I understood this... it seems like a simple 
solution that will work... but I just don;t understand it :(

Anyone fancy building something like this for me ... pretty please? 
with idiot proof docs.. :D

Andy

--- In ukha_d@y..., "Keith Doxey" <lists.diyha@b...>
wrote:
> You dont actually need ANYTHING to Zone IR on Homevision.
> 
> The 3.5mm jack has the tip connected to SWITCHED +5v which is the 
modulated
> IR output.
> The sleeve of the jack is permanently connected to ground.
> 
> PORT A is an open collector driver which GROUNDS the pins of port
A.
> 
> If you wire like this you have IR
> 
> 
> 3.5mm
> Tip
----------------------------------------------------------------
--------
> ----------------------
>                      
                   
                     
>
                    
>                     
R                  
R                    
R
>
R                  
R
>                      
                   
                     
>
                    
>                     
E                  
E                   
E
>
E                  
E
>                      
                   
                     
>
                    
>                     
A1               
A2                   
A3
>
A4                 
A5 ETC
> 
> where R is a series resistor of about 100 ohms, E is the IR 
emitter, A(x) is
> the port A pin
> 
> Before you send an IR command you just set the required pin of port
A to low
> (remember the logic is inverted for PortA) and away you go.
> Keith
> 
> www.diyha.co.uk
> www.kat5.tv




For more information: 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

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