RE: Re: Electronics Gurus brain required...

["Dr John Tankard" <john@xxxxxxx>]

> I wasn't thinking of using relays, from what I remember from the 
> previous posts they were not required... It's probably my 
> explaination that's at fault... I'll try again. (this may be totally
> incorrect - but that's why I'm asking :) 
> 
> The IR jack on the back of HV has +5v and GND 
> 
> You take the +5v from that jack and connect it to one side of the ALL
> IR emitters.. the other side of each emitter is connected to the A
> port.. ie. A1 through A8 .. this provides the GND for each emitter,
> individually controllable..
> 

Yes, sorry I did not read the original post, I was assuming you were
using it to switch some external source. However yes, it should work.
Remember its not a 5V supply its actualy the LED drive supplied from
the
emmitter of a transister, it will be 5v when the led is transmiting the
rest of the time its Ov because the transister is switched off.

>From memory the inside the HV there is a jumper which you can remove
to
disable the internal transmitter. 

John

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