Interesting idea, Russell, but at this point time is quite tight and I
don't think I could switch to NFC unless I were to use an
off-the-shelf solution. I already have an IR-based proto working.

Sean


On Sun, Jun 5, 2011 at 8:59 PM, RussellMc <apptechnz@gmail.com> wrote:
> Inductive coupling / "Near Field Communication" / NFC sounds close to ide=
al.
> Can be used to power remote too if desired.
> They say 4 cm range here but range can be metres if desired.
>
> =A0 =A0 =A0 =A0 =A0 http://en.wikipedia.org/wiki/Near_field_communication
>
>> =A0several of these devices could be in close proximity to each other
>
> Depending on the value of "close", 50 cm is getting a bit far if you
> have multiple units but if you can get the two closer together and
> reduce available range then you can use N in closish physical
> proximity. Dust no problem. Probably no certification issues either
> (YMMV). Potentially low cost and simple.
>
> Capacitive coupling also worth thinking about.
>
>
> =A0Russell
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