Josh Wrote
>
> I once ripped one of those shoes apart. All that was inside was a clear
> plastic block with a round watch battery, a couple LEDs, and a ball
> bearing in a channel molded inside the block. When the child took a
> step, the bearing slid forward, then back where it made contact with two
> wires, lighting the LED, then was pushed forward with a little spring. I
> assume this was so the LED could never be constantly lit thereby
> draining the battery.
>

There is also a kynar strip + fet + battery version, I have
seen the circuitry and images of the large scale
production for it. The shoes are ASICS.



_____________________________

Lance Allen
Technical Officer
Uni of Auckland
Psych Dept
New Zealand

www.psych.auckland.ac.nz

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