>The internal alternator powered wheel trims.
>At about $US3 per item they seem to be value for money :-)

Shucks, shades of the little fan I bought from a local shop for =A31.99, wi=
th
a handful of single colour LEDS on one blade. Must have some form of tiny
micro in the rotor portion as each LED gets turned on at various rates to
make rotating patterns, which vary according to time. Doesn't seem to have
any index point to check the speed, as the LEDs still get turned off and on
if you stall it.

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