Re: Electronics Gurus brain required...

["andy_powell_is" <ukha@xxxxxxx>]

--- In ukha_d@y..., "i.bird@t..." <Ian@M...> wrote:

> *********************HOW TO*************************
> Basically and without thinking it through too much you would have
> HV power from the jack running to the collector (the in) of a 
transistor.
> The emitter (the out) from said transistor would run to to base of
another transistor (resistors would be needed).
> The first tranny would be switched by PORTA somehow. This gives the
zoning. Can't remember how PORTA works so I cannot say more now.
> 
> All you need then is a power supply through the IR LEDs to the 
collector (the in) of the second transistor
> As above this is being switched by the 'zoning' transistor.
> Connect the emitter to ground and off you go. Again resistors may 
be needed to stop the LEDs going pop.
> ******************END HOW TO**********************

Ian following your message I did a search for transistors, to try and 
get some understanding of what you mean.. I think I got the general 
gist...(you can see it here: 

http://groups.yahoo.com/group/ukha_d/files/Transistor.bmp

Am I going along the right lines? I'm making some assumptions:

I would need 1 x TR and 1 x TR2 for each Homevision port used (ie the 
diagram above is an 8th of what the circuit might look like...

You'll explain what a "decoupling capacitor" is, and where it
should 
go...and what it does? 

Andy






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.