[dorkbotdc-blabber] SmarTrip Apparel

Lorne Covington lists at mediadog.com
Tue Jul 22 11:01:36 EDT 2008


Nikolas Coukouma wrote:
> ...  I'm wondering if the problem
> is that there's an induction coil element to this, since the chip
> draws power from that (yes?).
>   


Exactly.  It is not the overall length of the wire used for the antennae 
that is important; the loop size sets the frequency selectivity 
(resonance), and more loops get more power.  At least that's what I seem 
to remember from the olden days...  IANAEEBIPOOML (I am not an 
electrical engineer but I play one on mailing lists)

Ciao!

- Lorne





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