MattBeck@AOL.COM wrote:
>
> piezo elements ...
> is there any way, using natural body motion, to
> produce ... 4 ma at 5V for about a .06% duty cycle on a 24
> hour rotation using proper storage (low leakage cap).

~12 uW overall, maybe. But transmitting for 52 seconds
your cap needs to be fairly big. Caps are not really
practical, a tiny nicad might be better.

> I want to build a super small RF remote xmitter using a PIC

Who/what are you bugging?
I heard the FBI already had one that fitted inside an olive
so they could bug a Mafia boss who insisted on meeting in
a sauna. Meeting naked, he could be sure people had no
wires on them. He didn't realise the olive in the agent's
Martini picked up everything!