AVR-Chat

--- In AVR-Chat@yahoogroups.com, "Stefan Trethan" 
<stefan_trethan@g...> wrote:
> On Fri, 18 Feb 2005 18:14:31 -0000, Dave Mucha <dave_mucha@y...>  
> wrote:
> 
> >
> > The mating would be by being next to each other.  maybe a contact
> > type connection, but not plugs or any type of protruding contacts.
> > Think of a deck of cards that would be flat and need to touch to 
be
> > identified.  (really close is fine)   alignement is fine if an 
opto
> > sensor were to be used.  ie: serial handshaking.    RF is not 
desired.
> > Dave
> 
> 
> I suggest either using IR or using inductive transmission (coils).
> Do the devices have batteries?
> Are there "male" and "female" devices, or can they mate freely?
> (in other words are some TX and some RX or are they all TX/RX)
> 
> ST

IR would be fine, prefer to have extreemly close and not something 
that would work more than an inch apart.

And, yes, each unit will have a battery.  Most likely a flat cell 
phone batt or similar

Dave