[Development] IREDS

["Ian Lowe" <ian@xxxxxxx>]

Thats a neat idea!

Would there be enough I/O Pins to do this with a 16F84 or similar?

You would need one pin for the input from the local TSOP for IR RX, three
pins for the bits to read from an 8 bit encoder for the state of each
channel (we could use the B port pins with Interrupt on change, to detect
emitters being inserted/removed whilst the unit was on), another three pins
to drive the outputs, then presumably at least two pins for talking back to
the upstream controller. Is there a Dallas one-wire component that could
help in this?

Could you use a single 38Khx oscillator a-la-nigel, pipe it into something
like an 8-way analog switch IC, then just switch the particular line on or
off as requried to produce the pulses, or would you need a seperate version
of Nigel's IRTX circuit for each channel?

Ian.


----- Original Message -----
From: "Jon Whiten" <jon@xxxxxxx>
To: <ukha_d@xxxxxxx>
Sent: Sunday, May 20, 2001 4:04 PM
Subject: RE: [ukha_d] [Project] IREDS


> How's about:-
>
> 7 (+ 1) Channels
>
> CH #1 IR LED on-board
> CH #2 - #7 Plug-in emitters
> CH #8 Virtual Channel for Broadcasting to all emitters at this node.
>
> To keep things simple, arrange it so that the plug-in emitters use,
say a
> Mono 3.5mm jack plug and Stereo Skt.  Plugging in an emitter also
shorts
> Ring-to-screen which could be used to detect "Emitter
Present" - No
> Dip-switches to set.
>
> ??????
>
> Regards,
>
> Jon
> +--------------Personal------------+----------Work-----------+
>  Jon Whiten        Church Gresley   D.G. Controls Limited
>                        Derbyshire  Beacon Lamp Specialists
>  jon@xxxxxxx         England      mail@xxxxxxx
>  http://www.whiten.co.uk/     
     http://www.deegee.com
> +----------------------------------+-------------------------+
>
>
>
> > -----Original Message-----
> > From: Ian Lowe [mailto:ian@xxxxxxx]
> > Sent: 20 May 2001 15:45
> > To: ukha_d@xxxxxxx
> > Subject: Re: [ukha_d] [Project] IREDS
> >
> >
> >
> > So, your Controller would need to be able to interrogate the zone
> > boxes for
> > something like dip settings, to figure out what channels/zones
> > were in use,
> > and would provide an interface onto the Ethernet.
> >
> >
>
>
>
>
> Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
>
>




Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/