Re: Re: Hmevision ir transmitter

["Dave McLaughlin" <dave@xxxxxxx>]

Yep, the drawing looks good.

See my previous reply.

Dave...

----- Original Message ----- 
From: "andy_powell_is" <ukha@xxxxxxx>
To: <ukha_d@xxxxxxx>
Sent: Friday, May 31, 2002 1:56 PM
Subject: [ukha_d] Re: Hmevision ir transmitter


> 
> Dave,
>  
> > The outputs on Homevision are open collector NPN or PNP?
> 
> Errrr... chicken soup
> 
> 
> > Do they sink current to ground when the output is ON?
> 
> I believe so...
> 
>  
> > If my assumption is that the output goes to GROUND when on, then
> you will
> > need to put a pull up resistor on the output to +5V to make the
> output go to
> > HIGH (almost +5V but not quite) when the output is OFF. This will
> 
>  Ermm.. do you mean like this: (if yahoo doesn't screw it
up!)
> 
> +5v--+---C    E----
>           B
>      +-R---+
>            
> 
> 
> R=resistor
> C=collector
> B=base
> E=emitter



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