Chris Kirtley wrote:
>Dear all,
>
>Sorry to keep asking questions, but I'm trying to kill several birds
>with one stone. I want to sense proximity to a receiver so that I can
>transmit telemetry data (hence the reason I asked about RFID tags), and
>also to charge the battery inductively. I wonder if anyone has any tips
>on the latter? The battery is very low capacity (20mA 3V) Vanadium
>Pentoxide Lithium.
>

Alternatively, use a piezo in the sole of the shoe that flexes
and produces voltage during walking to keep the battery charged.
I think this has been done already by someone.

- danM

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